/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:20:42,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:20:42,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:20:42,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:20:42,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:20:42,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:20:42,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:20:42,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:20:42,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:20:42,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:20:42,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:20:42,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:20:42,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:20:42,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:20:42,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:20:42,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:20:42,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:20:42,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:20:42,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:20:42,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:20:42,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:20:42,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:20:42,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:20:42,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:20:42,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:20:42,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:20:42,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:20:42,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:20:42,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:20:42,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 04:20:42,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 04:20:42,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 04:20:42,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 04:20:42,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 04:20:42,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 04:20:42,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 04:20:42,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 04:20:42,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 04:20:42,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:20:42,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:20:42,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:20:42,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 04:20:42,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:20:42,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:20:42,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:20:42,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:20:42,611 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:20:42,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:20:42,611 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:20:42,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:20:42,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:20:42,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:20:42,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:20:42,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:20:42,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:20:42,613 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:20:42,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:20:42,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:20:42,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:20:42,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:20:42,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:20:42,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:20:42,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:20:42,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:20:42,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:20:42,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:20:42,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:20:42,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:20:42,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:20:42,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:20:42,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:20:42,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:20:42,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:20:42,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:20:42,944 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:20:42,946 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:20:42,946 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:20:42,947 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-19 04:20:43,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/720cebd01/953061483ced47d2abb49e9c145f23d4/FLAG8c6613962 [2020-08-19 04:20:43,412 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:20:43,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-19 04:20:43,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/720cebd01/953061483ced47d2abb49e9c145f23d4/FLAG8c6613962 [2020-08-19 04:20:43,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/720cebd01/953061483ced47d2abb49e9c145f23d4 [2020-08-19 04:20:43,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:20:43,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:20:43,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:20:43,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:20:43,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:20:43,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:20:43" (1/1) ... [2020-08-19 04:20:43,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56da84b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:43, skipping insertion in model container [2020-08-19 04:20:43,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:20:43" (1/1) ... [2020-08-19 04:20:43,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:20:43,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:20:44,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:20:44,105 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:20:44,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:20:44,159 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:20:44,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44 WrapperNode [2020-08-19 04:20:44,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:20:44,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:20:44,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:20:44,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:20:44,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... [2020-08-19 04:20:44,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... [2020-08-19 04:20:44,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... [2020-08-19 04:20:44,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... [2020-08-19 04:20:44,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... [2020-08-19 04:20:44,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... [2020-08-19 04:20:44,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... [2020-08-19 04:20:44,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:20:44,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:20:44,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:20:44,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:20:44,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:20:44,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:20:44,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:20:44,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 04:20:44,366 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-19 04:20:44,367 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-19 04:20:44,367 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-19 04:20:44,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:20:44,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:20:44,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 04:20:44,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 04:20:44,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 04:20:44,368 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-19 04:20:44,368 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-19 04:20:44,368 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-19 04:20:44,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:20:44,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:20:44,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:20:44,792 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:20:44,792 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 04:20:44,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:20:44 BoogieIcfgContainer [2020-08-19 04:20:44,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:20:44,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:20:44,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:20:44,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:20:44,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:20:43" (1/3) ... [2020-08-19 04:20:44,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d22d685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:20:44, skipping insertion in model container [2020-08-19 04:20:44,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:44" (2/3) ... [2020-08-19 04:20:44,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d22d685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:20:44, skipping insertion in model container [2020-08-19 04:20:44,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:20:44" (3/3) ... [2020-08-19 04:20:44,805 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-19 04:20:44,816 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:20:44,824 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:20:44,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:20:44,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:20:44,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:20:44,861 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:20:44,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:20:44,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:20:44,861 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:20:44,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:20:44,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:20:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-19 04:20:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 04:20:44,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:44,888 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] [2020-08-19 04:20:44,888 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-19 04:20:44,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:44,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148287462] [2020-08-19 04:20:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 04:20:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 04:20:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 04:20:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:45,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148287462] [2020-08-19 04:20:45,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:45,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 04:20:45,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451793655] [2020-08-19 04:20:45,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:20:45,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:20:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:20:45,266 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-19 04:20:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:45,410 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-19 04:20:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:20:45,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-19 04:20:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:45,427 INFO L225 Difference]: With dead ends: 136 [2020-08-19 04:20:45,428 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 04:20:45,432 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 [2020-08-19 04:20:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 04:20:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-19 04:20:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 04:20:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-19 04:20:45,491 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-19 04:20:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:45,493 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-19 04:20:45,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:20:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-19 04:20:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 04:20:45,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:45,497 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] [2020-08-19 04:20:45,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:20:45,499 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-19 04:20:45,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:45,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715260919] [2020-08-19 04:20:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 04:20:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:20:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:20:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:45,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715260919] [2020-08-19 04:20:45,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:45,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 04:20:45,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708556048] [2020-08-19 04:20:45,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:20:45,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:20:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:20:45,674 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-19 04:20:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:45,754 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-19 04:20:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:20:45,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-19 04:20:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:45,758 INFO L225 Difference]: With dead ends: 129 [2020-08-19 04:20:45,758 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 04:20:45,760 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 [2020-08-19 04:20:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 04:20:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-19 04:20:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 04:20:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-19 04:20:45,778 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-19 04:20:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:45,778 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-19 04:20:45,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:20:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-19 04:20:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 04:20:45,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:45,781 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] [2020-08-19 04:20:45,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:20:45,782 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-19 04:20:45,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:45,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301690580] [2020-08-19 04:20:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 04:20:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 04:20:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 04:20:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:45,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301690580] [2020-08-19 04:20:45,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:45,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 04:20:45,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378276073] [2020-08-19 04:20:45,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:20:45,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:20:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:20:45,951 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-19 04:20:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:46,103 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-19 04:20:46,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:20:46,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-19 04:20:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:46,106 INFO L225 Difference]: With dead ends: 145 [2020-08-19 04:20:46,106 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 04:20:46,107 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 [2020-08-19 04:20:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 04:20:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-19 04:20:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 04:20:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-19 04:20:46,123 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-19 04:20:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:46,123 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-19 04:20:46,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:20:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-19 04:20:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 04:20:46,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:46,126 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] [2020-08-19 04:20:46,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:20:46,127 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:46,127 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-19 04:20:46,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:46,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949541923] [2020-08-19 04:20:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 04:20:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 04:20:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:20:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:46,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949541923] [2020-08-19 04:20:46,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:46,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 04:20:46,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811683686] [2020-08-19 04:20:46,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:20:46,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:46,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:20:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:20:46,295 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-19 04:20:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:46,392 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-19 04:20:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:20:46,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-19 04:20:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:46,395 INFO L225 Difference]: With dead ends: 156 [2020-08-19 04:20:46,395 INFO L226 Difference]: Without dead ends: 93 [2020-08-19 04:20:46,396 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 [2020-08-19 04:20:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-19 04:20:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-19 04:20:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 04:20:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-19 04:20:46,410 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-19 04:20:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:46,411 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-19 04:20:46,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:20:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-19 04:20:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 04:20:46,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:46,414 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] [2020-08-19 04:20:46,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:20:46,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-19 04:20:46,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:46,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303109394] [2020-08-19 04:20:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 04:20:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 04:20:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 04:20:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:46,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303109394] [2020-08-19 04:20:46,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:46,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:20:46,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886925214] [2020-08-19 04:20:46,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:20:46,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:20:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:20:46,568 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-19 04:20:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:46,681 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-19 04:20:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:20:46,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-19 04:20:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:46,683 INFO L225 Difference]: With dead ends: 166 [2020-08-19 04:20:46,683 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 04:20:46,685 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 [2020-08-19 04:20:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 04:20:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-19 04:20:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 04:20:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-19 04:20:46,702 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-19 04:20:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:46,703 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-19 04:20:46,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:20:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-19 04:20:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 04:20:46,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:46,706 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] [2020-08-19 04:20:46,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:20:46,706 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-19 04:20:46,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:46,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792941113] [2020-08-19 04:20:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 04:20:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 04:20:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 04:20:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:46,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792941113] [2020-08-19 04:20:46,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:46,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:20:46,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984259338] [2020-08-19 04:20:46,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:20:46,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:20:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:20:46,881 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-19 04:20:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:46,981 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-19 04:20:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:20:46,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-19 04:20:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:46,985 INFO L225 Difference]: With dead ends: 176 [2020-08-19 04:20:46,985 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 04:20:46,987 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 [2020-08-19 04:20:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 04:20:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-19 04:20:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 04:20:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-19 04:20:47,026 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-19 04:20:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:47,027 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-19 04:20:47,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:20:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-19 04:20:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 04:20:47,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:47,029 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] [2020-08-19 04:20:47,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:20:47,030 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:47,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-19 04:20:47,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:47,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180974197] [2020-08-19 04:20:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 04:20:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:20:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 04:20:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:47,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180974197] [2020-08-19 04:20:47,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:47,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:20:47,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695507889] [2020-08-19 04:20:47,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:20:47,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:20:47,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:20:47,216 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-19 04:20:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:47,348 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-19 04:20:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:20:47,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-19 04:20:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:47,350 INFO L225 Difference]: With dead ends: 178 [2020-08-19 04:20:47,350 INFO L226 Difference]: Without dead ends: 115 [2020-08-19 04:20:47,351 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 [2020-08-19 04:20:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-19 04:20:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-19 04:20:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 04:20:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-19 04:20:47,364 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-19 04:20:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:47,365 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-19 04:20:47,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:20:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-19 04:20:47,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 04:20:47,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:47,366 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] [2020-08-19 04:20:47,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:20:47,367 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:47,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-19 04:20:47,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:47,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336083844] [2020-08-19 04:20:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 04:20:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 04:20:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 04:20:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:47,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336083844] [2020-08-19 04:20:47,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:47,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:20:47,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759363978] [2020-08-19 04:20:47,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:20:47,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:20:47,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:20:47,490 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-19 04:20:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:47,608 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-19 04:20:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:20:47,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-19 04:20:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:47,612 INFO L225 Difference]: With dead ends: 193 [2020-08-19 04:20:47,612 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 04:20:47,613 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 [2020-08-19 04:20:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 04:20:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-19 04:20:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 04:20:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-19 04:20:47,631 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-19 04:20:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:47,631 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-19 04:20:47,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:20:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-19 04:20:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 04:20:47,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:47,633 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] [2020-08-19 04:20:47,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:20:47,633 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-19 04:20:47,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:47,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717579383] [2020-08-19 04:20:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 04:20:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:20:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 04:20:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:47,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717579383] [2020-08-19 04:20:47,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:47,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:20:47,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313735861] [2020-08-19 04:20:47,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:20:47,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:47,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:20:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:20:47,830 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-19 04:20:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:48,040 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-19 04:20:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:20:48,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-19 04:20:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:48,042 INFO L225 Difference]: With dead ends: 190 [2020-08-19 04:20:48,042 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 04:20:48,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:20:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 04:20:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-19 04:20:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 04:20:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-19 04:20:48,054 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-19 04:20:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:48,054 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-19 04:20:48,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:20:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-19 04:20:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 04:20:48,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:48,056 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] [2020-08-19 04:20:48,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:20:48,056 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-19 04:20:48,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:48,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082764816] [2020-08-19 04:20:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 04:20:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 04:20:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:20:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:48,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082764816] [2020-08-19 04:20:48,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:48,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:20:48,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142247458] [2020-08-19 04:20:48,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:20:48,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:20:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:20:48,170 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-19 04:20:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:48,265 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-19 04:20:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:20:48,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-19 04:20:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:48,267 INFO L225 Difference]: With dead ends: 210 [2020-08-19 04:20:48,267 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 04:20:48,268 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 [2020-08-19 04:20:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 04:20:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-19 04:20:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 04:20:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-19 04:20:48,278 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-19 04:20:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:48,278 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-19 04:20:48,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:20:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-19 04:20:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 04:20:48,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:48,280 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] [2020-08-19 04:20:48,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:20:48,280 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-19 04:20:48,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:48,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4766336] [2020-08-19 04:20:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 04:20:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 04:20:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 04:20:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:48,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4766336] [2020-08-19 04:20:48,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:48,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:20:48,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900172954] [2020-08-19 04:20:48,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:20:48,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:48,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:20:48,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:20:48,449 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-19 04:20:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:48,608 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-19 04:20:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:20:48,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-19 04:20:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:48,611 INFO L225 Difference]: With dead ends: 202 [2020-08-19 04:20:48,611 INFO L226 Difference]: Without dead ends: 133 [2020-08-19 04:20:48,612 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 [2020-08-19 04:20:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-19 04:20:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-19 04:20:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-19 04:20:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-19 04:20:48,622 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-19 04:20:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:48,622 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-19 04:20:48,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:20:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-19 04:20:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 04:20:48,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:48,624 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] [2020-08-19 04:20:48,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:20:48,624 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-19 04:20:48,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:48,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608678003] [2020-08-19 04:20:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:20:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 04:20:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 04:20:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:48,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608678003] [2020-08-19 04:20:48,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:48,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:20:48,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558549695] [2020-08-19 04:20:48,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:20:48,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:48,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:20:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:20:48,752 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-19 04:20:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:48,865 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-19 04:20:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:20:48,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 04:20:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:48,868 INFO L225 Difference]: With dead ends: 227 [2020-08-19 04:20:48,868 INFO L226 Difference]: Without dead ends: 152 [2020-08-19 04:20:48,869 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 [2020-08-19 04:20:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-19 04:20:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-19 04:20:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 04:20:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-19 04:20:48,879 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-19 04:20:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:48,880 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-19 04:20:48,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:20:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-19 04:20:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 04:20:48,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:48,881 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] [2020-08-19 04:20:48,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:20:48,882 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-19 04:20:48,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:48,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204057082] [2020-08-19 04:20:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 04:20:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 04:20:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 04:20:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:49,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204057082] [2020-08-19 04:20:49,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:49,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:20:49,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005873344] [2020-08-19 04:20:49,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:20:49,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:20:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:20:49,060 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-19 04:20:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:49,281 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-19 04:20:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:20:49,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-19 04:20:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:49,283 INFO L225 Difference]: With dead ends: 214 [2020-08-19 04:20:49,283 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 04:20:49,284 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 [2020-08-19 04:20:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 04:20:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-19 04:20:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 04:20:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-19 04:20:49,295 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-19 04:20:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:49,295 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-19 04:20:49,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:20:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-19 04:20:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 04:20:49,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:49,297 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] [2020-08-19 04:20:49,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:20:49,297 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-19 04:20:49,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:49,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890140909] [2020-08-19 04:20:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 04:20:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 04:20:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 04:20:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:49,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890140909] [2020-08-19 04:20:49,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:49,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:20:49,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682496818] [2020-08-19 04:20:49,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:20:49,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:20:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:20:49,424 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-19 04:20:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:49,574 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-19 04:20:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:20:49,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-19 04:20:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:49,576 INFO L225 Difference]: With dead ends: 244 [2020-08-19 04:20:49,576 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 04:20:49,577 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 [2020-08-19 04:20:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 04:20:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-19 04:20:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 04:20:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-19 04:20:49,591 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-19 04:20:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:49,592 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-19 04:20:49,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:20:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-19 04:20:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 04:20:49,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:49,594 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] [2020-08-19 04:20:49,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:20:49,594 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-19 04:20:49,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:49,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699207300] [2020-08-19 04:20:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 04:20:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:20:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 04:20:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:49,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699207300] [2020-08-19 04:20:49,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:49,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:20:49,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91345374] [2020-08-19 04:20:49,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:20:49,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:20:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:20:49,831 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-19 04:20:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:50,066 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-19 04:20:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:20:50,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-19 04:20:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:50,068 INFO L225 Difference]: With dead ends: 226 [2020-08-19 04:20:50,068 INFO L226 Difference]: Without dead ends: 151 [2020-08-19 04:20:50,071 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 [2020-08-19 04:20:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-19 04:20:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-19 04:20:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 04:20:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-19 04:20:50,086 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-19 04:20:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:50,086 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-19 04:20:50,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:20:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-19 04:20:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 04:20:50,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:50,088 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] [2020-08-19 04:20:50,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:20:50,088 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-19 04:20:50,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:50,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336668233] [2020-08-19 04:20:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 04:20:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-19 04:20:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 04:20:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:50,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336668233] [2020-08-19 04:20:50,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:50,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:20:50,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918125311] [2020-08-19 04:20:50,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:20:50,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:20:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:20:50,273 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-19 04:20:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:50,435 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-19 04:20:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:20:50,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-19 04:20:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:50,438 INFO L225 Difference]: With dead ends: 261 [2020-08-19 04:20:50,438 INFO L226 Difference]: Without dead ends: 180 [2020-08-19 04:20:50,440 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 [2020-08-19 04:20:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-19 04:20:50,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-19 04:20:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-19 04:20:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-19 04:20:50,460 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-19 04:20:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:50,461 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-19 04:20:50,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:20:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-19 04:20:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 04:20:50,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:50,463 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] [2020-08-19 04:20:50,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:20:50,464 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-19 04:20:50,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:50,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531344654] [2020-08-19 04:20:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 04:20:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 04:20:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 04:20:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:50,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531344654] [2020-08-19 04:20:50,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:50,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:20:50,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572380329] [2020-08-19 04:20:50,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:20:50,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:20:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:20:50,767 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-19 04:20:51,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:51,038 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-19 04:20:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:20:51,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-19 04:20:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:51,041 INFO L225 Difference]: With dead ends: 238 [2020-08-19 04:20:51,041 INFO L226 Difference]: Without dead ends: 160 [2020-08-19 04:20:51,042 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 [2020-08-19 04:20:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-19 04:20:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-19 04:20:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 04:20:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-19 04:20:51,057 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-19 04:20:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:51,058 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-19 04:20:51,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:20:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-19 04:20:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 04:20:51,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:51,059 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] [2020-08-19 04:20:51,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:20:51,060 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:51,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-19 04:20:51,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:51,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884064028] [2020-08-19 04:20:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 04:20:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 04:20:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 04:20:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:51,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884064028] [2020-08-19 04:20:51,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:51,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:20:51,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264243875] [2020-08-19 04:20:51,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:20:51,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:51,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:20:51,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:20:51,233 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-19 04:20:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:51,385 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-19 04:20:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:20:51,386 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-19 04:20:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:51,387 INFO L225 Difference]: With dead ends: 278 [2020-08-19 04:20:51,387 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 04:20:51,388 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 [2020-08-19 04:20:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 04:20:51,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-19 04:20:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-19 04:20:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-19 04:20:51,402 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-19 04:20:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:51,403 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-19 04:20:51,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:20:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-19 04:20:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 04:20:51,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:51,406 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] [2020-08-19 04:20:51,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 04:20:51,406 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-19 04:20:51,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:51,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798529416] [2020-08-19 04:20:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 04:20:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 04:20:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 04:20:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:51,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798529416] [2020-08-19 04:20:51,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:51,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:20:51,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640384635] [2020-08-19 04:20:51,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:20:51,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:51,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:20:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:20:51,688 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-19 04:20:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:51,985 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-19 04:20:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 04:20:51,985 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-19 04:20:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:51,987 INFO L225 Difference]: With dead ends: 250 [2020-08-19 04:20:51,987 INFO L226 Difference]: Without dead ends: 169 [2020-08-19 04:20:51,988 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 [2020-08-19 04:20:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-19 04:20:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-19 04:20:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-19 04:20:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-19 04:20:51,999 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-19 04:20:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:52,000 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-19 04:20:52,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:20:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-19 04:20:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 04:20:52,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:52,001 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] [2020-08-19 04:20:52,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 04:20:52,002 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-19 04:20:52,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:52,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307195377] [2020-08-19 04:20:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:20:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-19 04:20:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 04:20:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:52,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307195377] [2020-08-19 04:20:52,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:52,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:20:52,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935839825] [2020-08-19 04:20:52,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:20:52,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:20:52,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:20:52,204 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-19 04:20:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:52,358 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-19 04:20:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 04:20:52,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-19 04:20:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:52,362 INFO L225 Difference]: With dead ends: 295 [2020-08-19 04:20:52,363 INFO L226 Difference]: Without dead ends: 208 [2020-08-19 04:20:52,364 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 [2020-08-19 04:20:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-19 04:20:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-19 04:20:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 04:20:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-19 04:20:52,376 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-19 04:20:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:52,376 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-19 04:20:52,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:20:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-19 04:20:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 04:20:52,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:52,379 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] [2020-08-19 04:20:52,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 04:20:52,379 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:52,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:52,379 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-19 04:20:52,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:52,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614705035] [2020-08-19 04:20:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 04:20:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 04:20:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 04:20:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:52,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614705035] [2020-08-19 04:20:52,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:52,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 04:20:52,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958977907] [2020-08-19 04:20:52,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 04:20:52,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 04:20:52,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:20:52,679 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-19 04:20:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:53,065 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-19 04:20:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:20:53,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-19 04:20:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:53,068 INFO L225 Difference]: With dead ends: 262 [2020-08-19 04:20:53,068 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 04:20:53,069 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 [2020-08-19 04:20:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 04:20:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-19 04:20:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-19 04:20:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-19 04:20:53,082 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-19 04:20:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:53,083 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-19 04:20:53,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 04:20:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-19 04:20:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 04:20:53,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:53,085 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] [2020-08-19 04:20:53,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 04:20:53,085 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-19 04:20:53,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:53,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769477332] [2020-08-19 04:20:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 04:20:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 04:20:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:20:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:53,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769477332] [2020-08-19 04:20:53,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:53,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 04:20:53,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406176647] [2020-08-19 04:20:53,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 04:20:53,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:53,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 04:20:53,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:20:53,280 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-19 04:20:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:53,447 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-19 04:20:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:20:53,448 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-19 04:20:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:53,450 INFO L225 Difference]: With dead ends: 312 [2020-08-19 04:20:53,450 INFO L226 Difference]: Without dead ends: 222 [2020-08-19 04:20:53,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:20:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-19 04:20:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-19 04:20:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 04:20:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-19 04:20:53,464 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-19 04:20:53,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:53,464 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-19 04:20:53,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 04:20:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-19 04:20:53,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 04:20:53,465 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:53,466 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] [2020-08-19 04:20:53,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 04:20:53,466 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:53,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:53,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-19 04:20:53,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:53,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57500548] [2020-08-19 04:20:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 04:20:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 04:20:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 04:20:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:53,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57500548] [2020-08-19 04:20:53,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:53,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:20:53,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269055405] [2020-08-19 04:20:53,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:20:53,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:53,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:20:53,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:20:53,813 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-19 04:20:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:54,305 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-19 04:20:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 04:20:54,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-19 04:20:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:54,308 INFO L225 Difference]: With dead ends: 274 [2020-08-19 04:20:54,308 INFO L226 Difference]: Without dead ends: 187 [2020-08-19 04:20:54,309 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 [2020-08-19 04:20:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-19 04:20:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-19 04:20:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-19 04:20:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-19 04:20:54,340 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-19 04:20:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:54,341 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-19 04:20:54,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:20:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-19 04:20:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-19 04:20:54,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:54,342 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] [2020-08-19 04:20:54,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 04:20:54,343 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:54,343 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-19 04:20:54,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:54,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044576343] [2020-08-19 04:20:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 04:20:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 04:20:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 04:20:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:54,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044576343] [2020-08-19 04:20:54,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:54,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:20:54,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822028617] [2020-08-19 04:20:54,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:20:54,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:54,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:20:54,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:20:54,557 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-19 04:20:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:54,721 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-19 04:20:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 04:20:54,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-19 04:20:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:54,723 INFO L225 Difference]: With dead ends: 329 [2020-08-19 04:20:54,724 INFO L226 Difference]: Without dead ends: 236 [2020-08-19 04:20:54,725 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 [2020-08-19 04:20:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-19 04:20:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-19 04:20:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-19 04:20:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-19 04:20:54,738 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-19 04:20:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:54,738 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-19 04:20:54,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:20:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-19 04:20:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 04:20:54,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:54,740 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] [2020-08-19 04:20:54,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 04:20:54,740 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:54,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-19 04:20:54,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:54,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550187922] [2020-08-19 04:20:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:54,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 04:20:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 04:20:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 04:20:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:55,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550187922] [2020-08-19 04:20:55,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:55,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 04:20:55,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763170065] [2020-08-19 04:20:55,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 04:20:55,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:55,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 04:20:55,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:20:55,060 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-19 04:20:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:55,485 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-19 04:20:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:20:55,486 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-19 04:20:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:55,487 INFO L225 Difference]: With dead ends: 286 [2020-08-19 04:20:55,488 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 04:20:55,488 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 [2020-08-19 04:20:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 04:20:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-19 04:20:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-19 04:20:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-19 04:20:55,503 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-19 04:20:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:55,503 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-19 04:20:55,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 04:20:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-19 04:20:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 04:20:55,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:55,505 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] [2020-08-19 04:20:55,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 04:20:55,505 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:55,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-19 04:20:55,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:55,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444865324] [2020-08-19 04:20:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 04:20:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 04:20:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 04:20:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:55,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444865324] [2020-08-19 04:20:55,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:55,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 04:20:55,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284854224] [2020-08-19 04:20:55,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 04:20:55,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 04:20:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:20:55,799 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-19 04:20:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:56,011 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-19 04:20:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:20:56,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-19 04:20:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:56,013 INFO L225 Difference]: With dead ends: 346 [2020-08-19 04:20:56,013 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 04:20:56,014 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 [2020-08-19 04:20:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 04:20:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-19 04:20:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 04:20:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-19 04:20:56,029 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-19 04:20:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:56,030 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-19 04:20:56,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 04:20:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-19 04:20:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 04:20:56,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:56,032 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] [2020-08-19 04:20:56,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 04:20:56,032 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-19 04:20:56,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:56,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443612958] [2020-08-19 04:20:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 04:20:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:20:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 04:20:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 04:20:56,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443612958] [2020-08-19 04:20:56,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:20:56,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:20:56,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134963927] [2020-08-19 04:20:56,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:20:56,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:56,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:20:56,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:20:56,097 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-19 04:20:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:56,110 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-19 04:20:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:20:56,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-19 04:20:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:56,112 INFO L225 Difference]: With dead ends: 160 [2020-08-19 04:20:56,112 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 04:20:56,113 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 [2020-08-19 04:20:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 04:20:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 04:20:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 04:20:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-19 04:20:56,128 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-19 04:20:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:56,129 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-19 04:20:56,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:20:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-19 04:20:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 04:20:56,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:56,131 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] [2020-08-19 04:20:56,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 04:20:56,131 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-19 04:20:56,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:56,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421505789] [2020-08-19 04:20:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 04:20:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:20:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 04:20:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 04:20:56,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421505789] [2020-08-19 04:20:56,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:20:56,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 04:20:56,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898445126] [2020-08-19 04:20:56,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:20:56,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:20:56,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:20:56,209 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-19 04:20:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:56,236 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-19 04:20:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:20:56,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-19 04:20:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:56,238 INFO L225 Difference]: With dead ends: 161 [2020-08-19 04:20:56,238 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 04:20:56,239 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 [2020-08-19 04:20:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 04:20:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 04:20:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 04:20:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-19 04:20:56,254 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-19 04:20:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:56,254 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-19 04:20:56,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:20:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-19 04:20:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 04:20:56,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:56,257 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] [2020-08-19 04:20:56,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 04:20:56,257 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:56,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-19 04:20:56,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:56,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47012081] [2020-08-19 04:20:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 04:20:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:20:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 04:20:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:56,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47012081] [2020-08-19 04:20:56,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:56,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:20:56,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307353898] [2020-08-19 04:20:56,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:20:56,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:56,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:20:56,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:20:56,661 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-19 04:20:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:57,168 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-19 04:20:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 04:20:57,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-19 04:20:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:57,172 INFO L225 Difference]: With dead ends: 298 [2020-08-19 04:20:57,172 INFO L226 Difference]: Without dead ends: 205 [2020-08-19 04:20:57,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:20:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-19 04:20:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-19 04:20:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-19 04:20:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-19 04:20:57,189 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-19 04:20:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:57,190 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-19 04:20:57,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:20:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-19 04:20:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 04:20:57,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:57,192 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] [2020-08-19 04:20:57,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 04:20:57,192 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:57,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-19 04:20:57,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:57,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926635045] [2020-08-19 04:20:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 04:20:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-19 04:20:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 04:20:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:57,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926635045] [2020-08-19 04:20:57,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:57,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:20:57,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309623541] [2020-08-19 04:20:57,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:20:57,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:57,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:20:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:20:57,490 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-19 04:20:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:57,714 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-19 04:20:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 04:20:57,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-19 04:20:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:57,717 INFO L225 Difference]: With dead ends: 363 [2020-08-19 04:20:57,718 INFO L226 Difference]: Without dead ends: 264 [2020-08-19 04:20:57,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:20:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-19 04:20:57,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-19 04:20:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-19 04:20:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-19 04:20:57,739 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-19 04:20:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:57,740 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-19 04:20:57,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:20:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-19 04:20:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-19 04:20:57,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:57,741 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] [2020-08-19 04:20:57,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 04:20:57,742 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-19 04:20:57,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:57,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824444435] [2020-08-19 04:20:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:57,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:58,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 04:20:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:58,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 04:20:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:58,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 04:20:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:58,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824444435] [2020-08-19 04:20:58,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:58,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 04:20:58,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488748217] [2020-08-19 04:20:58,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 04:20:58,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:58,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 04:20:58,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:20:58,175 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-19 04:20:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:58,875 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-19 04:20:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:20:58,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-19 04:20:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:58,878 INFO L225 Difference]: With dead ends: 310 [2020-08-19 04:20:58,878 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 04:20:58,879 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 [2020-08-19 04:20:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 04:20:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-19 04:20:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-19 04:20:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-19 04:20:58,890 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-19 04:20:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:58,890 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-19 04:20:58,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 04:20:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-19 04:20:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-19 04:20:58,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:58,892 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] [2020-08-19 04:20:58,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 04:20:58,893 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-19 04:20:58,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:58,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30664399] [2020-08-19 04:20:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:58,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:58,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 04:20:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 04:20:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 04:20:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:59,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30664399] [2020-08-19 04:20:59,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:59,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 04:20:59,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404691369] [2020-08-19 04:20:59,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 04:20:59,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 04:20:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:20:59,178 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-19 04:20:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:59,375 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-19 04:20:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:20:59,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-19 04:20:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:59,379 INFO L225 Difference]: With dead ends: 380 [2020-08-19 04:20:59,379 INFO L226 Difference]: Without dead ends: 278 [2020-08-19 04:20:59,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:20:59,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-19 04:20:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-19 04:20:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-19 04:20:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-19 04:20:59,401 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-19 04:20:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:59,401 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-19 04:20:59,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 04:20:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-19 04:20:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 04:20:59,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:59,403 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] [2020-08-19 04:20:59,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 04:20:59,403 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-19 04:20:59,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:59,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045709269] [2020-08-19 04:20:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:20:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:20:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 04:20:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 04:20:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 04:20:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:20:59,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045709269] [2020-08-19 04:20:59,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:20:59,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:20:59,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40011817] [2020-08-19 04:20:59,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:20:59,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:20:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:20:59,940 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-19 04:21:00,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:00,578 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-19 04:21:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 04:21:00,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 04:21:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:00,584 INFO L225 Difference]: With dead ends: 322 [2020-08-19 04:21:00,584 INFO L226 Difference]: Without dead ends: 223 [2020-08-19 04:21:00,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:21:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-19 04:21:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-19 04:21:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-19 04:21:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-19 04:21:00,601 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-19 04:21:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:00,601 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-19 04:21:00,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:21:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-19 04:21:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 04:21:00,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:00,604 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] [2020-08-19 04:21:00,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 04:21:00,604 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-19 04:21:00,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:00,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116959759] [2020-08-19 04:21:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:00,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:00,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:00,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:00,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:21:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:00,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 04:21:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 04:21:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:00,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116959759] [2020-08-19 04:21:00,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:00,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:21:00,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492778787] [2020-08-19 04:21:00,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:21:00,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:00,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:21:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:21:00,966 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-19 04:21:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:01,217 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-19 04:21:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 04:21:01,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-19 04:21:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:01,219 INFO L225 Difference]: With dead ends: 397 [2020-08-19 04:21:01,220 INFO L226 Difference]: Without dead ends: 292 [2020-08-19 04:21:01,221 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 [2020-08-19 04:21:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-19 04:21:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-19 04:21:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-19 04:21:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-19 04:21:01,236 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-19 04:21:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:01,236 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-19 04:21:01,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:21:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-19 04:21:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 04:21:01,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:01,238 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] [2020-08-19 04:21:01,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 04:21:01,238 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-19 04:21:01,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:01,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784805866] [2020-08-19 04:21:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:01,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:01,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:01,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 04:21:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:01,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 04:21:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:01,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 04:21:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:01,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784805866] [2020-08-19 04:21:01,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:01,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 04:21:01,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549618287] [2020-08-19 04:21:01,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 04:21:01,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:01,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 04:21:01,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:21:01,837 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-19 04:21:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:02,674 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-19 04:21:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:21:02,675 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-19 04:21:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:02,677 INFO L225 Difference]: With dead ends: 334 [2020-08-19 04:21:02,677 INFO L226 Difference]: Without dead ends: 232 [2020-08-19 04:21:02,678 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 [2020-08-19 04:21:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-19 04:21:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-19 04:21:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 04:21:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-19 04:21:02,695 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-19 04:21:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:02,695 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-19 04:21:02,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 04:21:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-19 04:21:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-19 04:21:02,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:02,697 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] [2020-08-19 04:21:02,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 04:21:02,697 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-19 04:21:02,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:02,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999943026] [2020-08-19 04:21:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:02,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:02,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:02,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 04:21:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 04:21:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 04:21:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:03,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999943026] [2020-08-19 04:21:03,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:03,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 04:21:03,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053575182] [2020-08-19 04:21:03,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 04:21:03,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 04:21:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:21:03,061 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-19 04:21:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:03,366 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-19 04:21:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:21:03,367 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-19 04:21:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:03,369 INFO L225 Difference]: With dead ends: 414 [2020-08-19 04:21:03,369 INFO L226 Difference]: Without dead ends: 306 [2020-08-19 04:21:03,370 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 [2020-08-19 04:21:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-19 04:21:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-19 04:21:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-19 04:21:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-19 04:21:03,385 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-19 04:21:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:03,386 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-19 04:21:03,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 04:21:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-19 04:21:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 04:21:03,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:03,387 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] [2020-08-19 04:21:03,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 04:21:03,388 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-19 04:21:03,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:03,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004208518] [2020-08-19 04:21:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 04:21:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 04:21:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 04:21:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:03,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004208518] [2020-08-19 04:21:03,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:03,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 04:21:03,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193850822] [2020-08-19 04:21:03,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 04:21:03,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:03,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 04:21:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:21:03,893 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-19 04:21:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:04,666 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-19 04:21:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 04:21:04,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-19 04:21:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:04,668 INFO L225 Difference]: With dead ends: 346 [2020-08-19 04:21:04,668 INFO L226 Difference]: Without dead ends: 241 [2020-08-19 04:21:04,669 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 [2020-08-19 04:21:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-19 04:21:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-19 04:21:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-19 04:21:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-19 04:21:04,683 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-19 04:21:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:04,684 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-19 04:21:04,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 04:21:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-19 04:21:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-19 04:21:04,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:04,686 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] [2020-08-19 04:21:04,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 04:21:04,686 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-19 04:21:04,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:04,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653516047] [2020-08-19 04:21:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:04,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:04,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:04,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 04:21:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 04:21:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 04:21:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:05,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653516047] [2020-08-19 04:21:05,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:05,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 04:21:05,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50503635] [2020-08-19 04:21:05,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 04:21:05,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 04:21:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:21:05,096 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-19 04:21:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:05,438 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-19 04:21:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 04:21:05,438 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-19 04:21:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:05,441 INFO L225 Difference]: With dead ends: 431 [2020-08-19 04:21:05,442 INFO L226 Difference]: Without dead ends: 320 [2020-08-19 04:21:05,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:21:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-19 04:21:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-19 04:21:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-19 04:21:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-19 04:21:05,459 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-19 04:21:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:05,459 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-19 04:21:05,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 04:21:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-19 04:21:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-19 04:21:05,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:05,461 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] [2020-08-19 04:21:05,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 04:21:05,461 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-19 04:21:05,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:05,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226588644] [2020-08-19 04:21:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 04:21:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 04:21:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 04:21:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:05,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226588644] [2020-08-19 04:21:05,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:05,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 04:21:05,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668663212] [2020-08-19 04:21:05,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 04:21:05,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 04:21:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:21:05,976 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-19 04:21:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:06,752 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-19 04:21:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 04:21:06,753 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-19 04:21:06,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:06,755 INFO L225 Difference]: With dead ends: 358 [2020-08-19 04:21:06,755 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 04:21:06,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:21:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 04:21:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-19 04:21:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-19 04:21:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-19 04:21:06,770 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-19 04:21:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:06,770 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-19 04:21:06,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 04:21:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-19 04:21:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-19 04:21:06,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:06,772 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] [2020-08-19 04:21:06,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 04:21:06,772 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-19 04:21:06,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:06,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869899220] [2020-08-19 04:21:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:06,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:06,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:06,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:07,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 04:21:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:07,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 04:21:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:07,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:07,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869899220] [2020-08-19 04:21:07,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:07,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 04:21:07,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280162501] [2020-08-19 04:21:07,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 04:21:07,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:07,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 04:21:07,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:21:07,180 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-19 04:21:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:07,420 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-19 04:21:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 04:21:07,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-19 04:21:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:07,427 INFO L225 Difference]: With dead ends: 448 [2020-08-19 04:21:07,427 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 04:21:07,429 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 [2020-08-19 04:21:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 04:21:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-19 04:21:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 04:21:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-19 04:21:07,452 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-19 04:21:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:07,453 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-19 04:21:07,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 04:21:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-19 04:21:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 04:21:07,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:07,455 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] [2020-08-19 04:21:07,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 04:21:07,456 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-19 04:21:07,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:07,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236330703] [2020-08-19 04:21:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:07,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:07,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:07,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:08,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 04:21:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:08,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 04:21:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:08,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 04:21:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:08,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236330703] [2020-08-19 04:21:08,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:08,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 04:21:08,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275119260] [2020-08-19 04:21:08,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 04:21:08,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 04:21:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:21:08,083 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-19 04:21:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:08,975 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-19 04:21:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 04:21:08,976 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-19 04:21:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:08,978 INFO L225 Difference]: With dead ends: 370 [2020-08-19 04:21:08,979 INFO L226 Difference]: Without dead ends: 259 [2020-08-19 04:21:08,980 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 [2020-08-19 04:21:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-19 04:21:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-19 04:21:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-19 04:21:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-19 04:21:08,996 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-19 04:21:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:08,996 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-19 04:21:08,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 04:21:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-19 04:21:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 04:21:08,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:08,998 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] [2020-08-19 04:21:08,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 04:21:08,998 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:08,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:08,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-19 04:21:08,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:08,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406053448] [2020-08-19 04:21:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 04:21:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 04:21:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-19 04:21:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:09,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406053448] [2020-08-19 04:21:09,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:09,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 04:21:09,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244794313] [2020-08-19 04:21:09,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 04:21:09,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:09,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 04:21:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:21:09,436 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-19 04:21:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:09,813 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-19 04:21:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 04:21:09,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-19 04:21:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:09,816 INFO L225 Difference]: With dead ends: 465 [2020-08-19 04:21:09,816 INFO L226 Difference]: Without dead ends: 348 [2020-08-19 04:21:09,817 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 [2020-08-19 04:21:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-19 04:21:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-19 04:21:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-19 04:21:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-19 04:21:09,834 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-19 04:21:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:09,834 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-19 04:21:09,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 04:21:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-19 04:21:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-19 04:21:09,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:09,836 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] [2020-08-19 04:21:09,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 04:21:09,836 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:09,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-19 04:21:09,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:09,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977413820] [2020-08-19 04:21:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:09,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:10,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 04:21:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:10,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 04:21:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:10,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 04:21:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:10,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977413820] [2020-08-19 04:21:10,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:10,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 04:21:10,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424984928] [2020-08-19 04:21:10,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 04:21:10,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:10,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 04:21:10,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-19 04:21:10,487 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-19 04:21:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:11,674 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-19 04:21:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 04:21:11,675 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-19 04:21:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:11,676 INFO L225 Difference]: With dead ends: 382 [2020-08-19 04:21:11,676 INFO L226 Difference]: Without dead ends: 268 [2020-08-19 04:21:11,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:21:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-19 04:21:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-19 04:21:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-19 04:21:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-19 04:21:11,700 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-19 04:21:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:11,701 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-19 04:21:11,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 04:21:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-19 04:21:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-19 04:21:11,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:11,703 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] [2020-08-19 04:21:11,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-19 04:21:11,704 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:11,704 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-19 04:21:11,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:11,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306462975] [2020-08-19 04:21:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:11,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:11,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:12,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 04:21:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:12,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 04:21:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:12,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 04:21:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:12,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306462975] [2020-08-19 04:21:12,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:12,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 04:21:12,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812656403] [2020-08-19 04:21:12,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 04:21:12,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:12,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 04:21:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 04:21:12,158 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-19 04:21:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:12,529 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-19 04:21:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 04:21:12,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-19 04:21:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:12,532 INFO L225 Difference]: With dead ends: 482 [2020-08-19 04:21:12,532 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 04:21:12,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:21:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 04:21:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-19 04:21:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-19 04:21:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-19 04:21:12,560 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-19 04:21:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:12,560 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-19 04:21:12,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 04:21:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-19 04:21:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 04:21:12,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:12,562 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] [2020-08-19 04:21:12,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-19 04:21:12,562 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-19 04:21:12,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:12,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416340770] [2020-08-19 04:21:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:12,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:12,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:12,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:13,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 04:21:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:13,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 04:21:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:13,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 04:21:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:13,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416340770] [2020-08-19 04:21:13,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:13,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 04:21:13,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077326531] [2020-08-19 04:21:13,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 04:21:13,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 04:21:13,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:21:13,259 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-19 04:21:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:14,519 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-19 04:21:14,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 04:21:14,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-19 04:21:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:14,521 INFO L225 Difference]: With dead ends: 394 [2020-08-19 04:21:14,521 INFO L226 Difference]: Without dead ends: 277 [2020-08-19 04:21:14,523 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 [2020-08-19 04:21:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-19 04:21:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-19 04:21:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-19 04:21:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-19 04:21:14,540 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-19 04:21:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:14,540 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-19 04:21:14,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 04:21:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-19 04:21:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-19 04:21:14,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:14,542 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] [2020-08-19 04:21:14,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-19 04:21:14,542 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-19 04:21:14,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:14,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125302493] [2020-08-19 04:21:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:14,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:14,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:14,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:14,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 04:21:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:14,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 04:21:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:14,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-19 04:21:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:15,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125302493] [2020-08-19 04:21:15,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:15,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 04:21:15,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70816009] [2020-08-19 04:21:15,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 04:21:15,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 04:21:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:21:15,030 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-19 04:21:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:15,412 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-19 04:21:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 04:21:15,413 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-19 04:21:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:15,415 INFO L225 Difference]: With dead ends: 499 [2020-08-19 04:21:15,416 INFO L226 Difference]: Without dead ends: 376 [2020-08-19 04:21:15,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 04:21:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-19 04:21:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-19 04:21:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-19 04:21:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-19 04:21:15,435 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-19 04:21:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:15,436 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-19 04:21:15,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 04:21:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-19 04:21:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-19 04:21:15,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:15,438 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] [2020-08-19 04:21:15,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-19 04:21:15,438 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:15,438 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-19 04:21:15,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:15,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256412111] [2020-08-19 04:21:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:15,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:15,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:15,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:16,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 04:21:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:16,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-19 04:21:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:16,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 04:21:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:16,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256412111] [2020-08-19 04:21:16,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:16,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 04:21:16,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214629664] [2020-08-19 04:21:16,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 04:21:16,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 04:21:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-19 04:21:16,128 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-19 04:21:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:17,437 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-19 04:21:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 04:21:17,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-19 04:21:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:17,443 INFO L225 Difference]: With dead ends: 406 [2020-08-19 04:21:17,445 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 04:21:17,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:21:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 04:21:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-19 04:21:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-19 04:21:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-19 04:21:17,471 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-19 04:21:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:17,472 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-19 04:21:17,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 04:21:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-19 04:21:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-19 04:21:17,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:17,473 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] [2020-08-19 04:21:17,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-19 04:21:17,474 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:17,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-19 04:21:17,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:17,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8563463] [2020-08-19 04:21:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:17,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:17,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:17,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:18,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 04:21:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:18,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 04:21:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:18,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 04:21:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:18,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8563463] [2020-08-19 04:21:18,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:18,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 04:21:18,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728565453] [2020-08-19 04:21:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 04:21:18,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:18,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 04:21:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 04:21:18,036 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-19 04:21:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:18,333 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-19 04:21:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 04:21:18,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-19 04:21:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:18,336 INFO L225 Difference]: With dead ends: 516 [2020-08-19 04:21:18,336 INFO L226 Difference]: Without dead ends: 390 [2020-08-19 04:21:18,338 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 [2020-08-19 04:21:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-19 04:21:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-19 04:21:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-19 04:21:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-19 04:21:18,357 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-19 04:21:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:18,357 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-19 04:21:18,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 04:21:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-19 04:21:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 04:21:18,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:18,359 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] [2020-08-19 04:21:18,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-19 04:21:18,359 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-19 04:21:18,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:18,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091191939] [2020-08-19 04:21:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:18,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:18,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:18,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:19,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 04:21:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:19,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 04:21:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:19,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 04:21:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:19,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091191939] [2020-08-19 04:21:19,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:19,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 04:21:19,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080860629] [2020-08-19 04:21:19,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 04:21:19,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:19,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 04:21:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:21:19,095 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-19 04:21:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:20,471 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-19 04:21:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 04:21:20,471 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-19 04:21:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:20,473 INFO L225 Difference]: With dead ends: 418 [2020-08-19 04:21:20,474 INFO L226 Difference]: Without dead ends: 295 [2020-08-19 04:21:20,475 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 [2020-08-19 04:21:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-19 04:21:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-19 04:21:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-19 04:21:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-19 04:21:20,498 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-19 04:21:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:20,498 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-19 04:21:20,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 04:21:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-19 04:21:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-19 04:21:20,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:20,500 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] [2020-08-19 04:21:20,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-19 04:21:20,500 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-19 04:21:20,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:20,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963122828] [2020-08-19 04:21:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:20,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:20,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 04:21:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 04:21:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-19 04:21:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 04:21:21,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963122828] [2020-08-19 04:21:21,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:21,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 04:21:21,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382602699] [2020-08-19 04:21:21,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 04:21:21,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 04:21:21,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:21:21,074 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-19 04:21:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:21,503 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-19 04:21:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 04:21:21,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-19 04:21:21,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:21,506 INFO L225 Difference]: With dead ends: 533 [2020-08-19 04:21:21,506 INFO L226 Difference]: Without dead ends: 404 [2020-08-19 04:21:21,507 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 [2020-08-19 04:21:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-19 04:21:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-19 04:21:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-19 04:21:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-19 04:21:21,527 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-19 04:21:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:21,527 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-19 04:21:21,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 04:21:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-19 04:21:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 04:21:21,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:21,529 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] [2020-08-19 04:21:21,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-19 04:21:21,529 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-19 04:21:21,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:21,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459712050] [2020-08-19 04:21:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 04:21:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 04:21:21,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459712050] [2020-08-19 04:21:21,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:21:21,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 04:21:21,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194155003] [2020-08-19 04:21:21,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:21:21,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:21:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:21:21,727 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-19 04:21:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:22,245 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-19 04:21:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:21:22,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 04:21:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:22,250 INFO L225 Difference]: With dead ends: 271 [2020-08-19 04:21:22,251 INFO L226 Difference]: Without dead ends: 261 [2020-08-19 04:21:22,251 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 [2020-08-19 04:21:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-19 04:21:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-19 04:21:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-19 04:21:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-19 04:21:22,282 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-19 04:21:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:22,283 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-19 04:21:22,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:21:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-19 04:21:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 04:21:22,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:22,286 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] [2020-08-19 04:21:22,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-19 04:21:22,287 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-19 04:21:22,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:22,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172226254] [2020-08-19 04:21:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 04:21:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 04:21:22,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172226254] [2020-08-19 04:21:22,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:22,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:21:22,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345605338] [2020-08-19 04:21:22,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:21:22,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:21:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:21:22,590 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-19 04:21:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:22,821 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-19 04:21:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:21:22,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 04:21:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:22,825 INFO L225 Difference]: With dead ends: 285 [2020-08-19 04:21:22,825 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 04:21:22,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:21:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 04:21:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-19 04:21:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 04:21:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-19 04:21:22,856 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-19 04:21:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:22,856 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-19 04:21:22,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:21:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-19 04:21:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 04:21:22,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:22,858 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] [2020-08-19 04:21:22,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-19 04:21:22,859 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:22,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-19 04:21:22,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:22,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192261925] [2020-08-19 04:21:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 04:21:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-19 04:21:22,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192261925] [2020-08-19 04:21:22,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:21:22,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:21:22,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614490703] [2020-08-19 04:21:22,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:21:22,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:21:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:21:22,988 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-19 04:21:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:23,050 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-19 04:21:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:21:23,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-19 04:21:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:23,053 INFO L225 Difference]: With dead ends: 271 [2020-08-19 04:21:23,053 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 04:21:23,054 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 [2020-08-19 04:21:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 04:21:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-19 04:21:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 04:21:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-19 04:21:23,092 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-19 04:21:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:23,092 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-19 04:21:23,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:21:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-19 04:21:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 04:21:23,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:23,095 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] [2020-08-19 04:21:23,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-19 04:21:23,095 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-19 04:21:23,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:23,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988984770] [2020-08-19 04:21:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 04:21:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 04:21:23,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988984770] [2020-08-19 04:21:23,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:23,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:21:23,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544049288] [2020-08-19 04:21:23,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:21:23,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:21:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:21:23,448 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-19 04:21:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:23,684 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-19 04:21:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:21:23,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-19 04:21:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:23,687 INFO L225 Difference]: With dead ends: 284 [2020-08-19 04:21:23,687 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 04:21:23,688 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 [2020-08-19 04:21:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 04:21:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-19 04:21:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-19 04:21:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-19 04:21:23,719 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-19 04:21:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:23,720 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-19 04:21:23,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:21:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-19 04:21:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 04:21:23,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:23,723 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] [2020-08-19 04:21:23,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-19 04:21:23,723 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-19 04:21:23,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:23,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864249036] [2020-08-19 04:21:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 04:21:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 04:21:23,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864249036] [2020-08-19 04:21:23,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:21:23,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:21:23,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190405099] [2020-08-19 04:21:23,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:21:23,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:21:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:21:23,913 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-19 04:21:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:24,039 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-19 04:21:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:21:24,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-19 04:21:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:24,042 INFO L225 Difference]: With dead ends: 303 [2020-08-19 04:21:24,042 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 04:21:24,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:21:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 04:21:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-19 04:21:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-19 04:21:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-19 04:21:24,075 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-19 04:21:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:24,075 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-19 04:21:24,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:21:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-19 04:21:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-19 04:21:24,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:24,078 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] [2020-08-19 04:21:24,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-19 04:21:24,078 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:24,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-19 04:21:24,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:24,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304514584] [2020-08-19 04:21:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 04:21:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 04:21:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 04:21:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 04:21:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 04:21:24,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304514584] [2020-08-19 04:21:24,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:24,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 04:21:24,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723935622] [2020-08-19 04:21:24,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:21:24,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:24,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:21:24,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:21:24,199 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-19 04:21:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:24,305 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-19 04:21:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:21:24,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-19 04:21:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:24,307 INFO L225 Difference]: With dead ends: 409 [2020-08-19 04:21:24,307 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 04:21:24,309 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 [2020-08-19 04:21:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 04:21:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-19 04:21:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 04:21:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-19 04:21:24,327 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-19 04:21:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:24,327 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-19 04:21:24,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:21:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-19 04:21:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 04:21:24,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:24,329 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] [2020-08-19 04:21:24,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-19 04:21:24,329 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-19 04:21:24,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:24,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856485002] [2020-08-19 04:21:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 04:21:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-19 04:21:24,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856485002] [2020-08-19 04:21:24,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:21:24,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:21:24,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337081394] [2020-08-19 04:21:24,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:21:24,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:21:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:21:24,512 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-19 04:21:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:24,650 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-19 04:21:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:21:24,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-19 04:21:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:24,652 INFO L225 Difference]: With dead ends: 158 [2020-08-19 04:21:24,652 INFO L226 Difference]: Without dead ends: 143 [2020-08-19 04:21:24,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:21:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-19 04:21:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-19 04:21:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 04:21:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-19 04:21:24,672 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-19 04:21:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:24,673 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-19 04:21:24,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:21:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-19 04:21:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 04:21:24,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:24,674 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, 1, 1, 1] [2020-08-19 04:21:24,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-19 04:21:24,675 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-19 04:21:24,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:24,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677498619] [2020-08-19 04:21:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 04:21:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-19 04:21:24,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677498619] [2020-08-19 04:21:24,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:24,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:21:24,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318971070] [2020-08-19 04:21:24,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:21:24,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:24,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:21:24,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:21:24,822 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-19 04:21:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:24,941 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-19 04:21:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:21:24,941 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-19 04:21:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:24,943 INFO L225 Difference]: With dead ends: 176 [2020-08-19 04:21:24,943 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 04:21:24,943 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 [2020-08-19 04:21:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 04:21:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-19 04:21:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-19 04:21:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-19 04:21:24,966 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-19 04:21:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:24,966 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-19 04:21:24,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:21:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-19 04:21:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 04:21:24,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:24,968 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, 1, 1, 1] [2020-08-19 04:21:24,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-19 04:21:24,968 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-19 04:21:24,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:24,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741325525] [2020-08-19 04:21:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 04:21:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 04:21:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-19 04:21:25,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741325525] [2020-08-19 04:21:25,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:25,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:21:25,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469111722] [2020-08-19 04:21:25,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:21:25,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:25,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:21:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:21:25,156 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-19 04:21:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:25,341 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-19 04:21:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:21:25,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-19 04:21:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:25,343 INFO L225 Difference]: With dead ends: 170 [2020-08-19 04:21:25,343 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 04:21:25,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:21:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 04:21:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-19 04:21:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 04:21:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-19 04:21:25,361 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-19 04:21:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:25,361 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-19 04:21:25,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:21:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-19 04:21:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 04:21:25,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:25,362 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] [2020-08-19 04:21:25,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-19 04:21:25,363 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:25,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:25,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-19 04:21:25,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:25,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490318632] [2020-08-19 04:21:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 04:21:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 04:21:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-19 04:21:25,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490318632] [2020-08-19 04:21:25,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:25,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:21:25,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960440220] [2020-08-19 04:21:25,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:21:25,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:25,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:21:25,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:21:25,513 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-19 04:21:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:25,602 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-19 04:21:25,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:21:25,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-19 04:21:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:25,604 INFO L225 Difference]: With dead ends: 173 [2020-08-19 04:21:25,604 INFO L226 Difference]: Without dead ends: 163 [2020-08-19 04:21:25,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:21:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-19 04:21:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-19 04:21:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 04:21:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-19 04:21:25,623 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-19 04:21:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:25,624 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-19 04:21:25,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:21:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-19 04:21:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 04:21:25,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:21:25,625 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] [2020-08-19 04:21:25,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-19 04:21:25,626 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:21:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:21:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-19 04:21:25,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:21:25,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194803635] [2020-08-19 04:21:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:21:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:21:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 04:21:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 04:21:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 04:21:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 04:21:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 04:21:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:21:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-19 04:21:25,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194803635] [2020-08-19 04:21:25,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:21:25,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:21:25,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728971773] [2020-08-19 04:21:25,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:21:25,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:21:25,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:21:25,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:21:25,864 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-19 04:21:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:21:26,013 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-19 04:21:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:21:26,013 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-19 04:21:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:21:26,014 INFO L225 Difference]: With dead ends: 157 [2020-08-19 04:21:26,014 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:21:26,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:21:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:21:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:21:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:21:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:21:26,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-19 04:21:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:21:26,016 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:21:26,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:21:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:21:26,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:21:26,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-19 04:21:26,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.