/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-22 05:25:42,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:25:42,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:25:42,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:25:42,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:25:42,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:25:42,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:25:42,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:25:42,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:25:42,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:25:42,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:25:42,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:25:42,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:25:42,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:25:42,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:25:42,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:25:42,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:25:42,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:25:42,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:25:42,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:25:42,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:25:42,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:25:42,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:25:42,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:25:42,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:25:42,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:25:42,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:25:42,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:25:42,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:25:42,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:25:42,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:25:42,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:25:42,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:25:42,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:25:42,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:25:42,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:25:42,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:25:42,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:25:42,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:25:42,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:25:42,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:25:42,216 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 [2020-08-22 05:25:42,237 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:25:42,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:25:42,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:25:42,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:25:42,239 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:25:42,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:25:42,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:25:42,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:25:42,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:25:42,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:25:42,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:25:42,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:25:42,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:25:42,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:25:42,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:25:42,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:25:42,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:25:42,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:25:42,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:25:42,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:25:42,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:25:42,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:25:42,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:25:42,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:25:42,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:25:42,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:25:42,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:25:42,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:25:42,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:25:42,244 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:25:42,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:25:42,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:25:42,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:25:42,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:25:42,589 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:25:42,590 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 05:25:42,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147f8b5f8/e60067e66649490692834ba243ad2a34/FLAGaf3d2be85 [2020-08-22 05:25:43,078 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:25:43,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 05:25:43,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147f8b5f8/e60067e66649490692834ba243ad2a34/FLAGaf3d2be85 [2020-08-22 05:25:43,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147f8b5f8/e60067e66649490692834ba243ad2a34 [2020-08-22 05:25:43,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:25:43,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:25:43,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:25:43,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:25:43,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:25:43,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2846a526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43, skipping insertion in model container [2020-08-22 05:25:43,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:25:43,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:25:43,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:25:43,779 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:25:43,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:25:43,939 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:25:43,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43 WrapperNode [2020-08-22 05:25:43,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:25:43,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:25:43,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:25:43,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:25:43,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (1/1) ... [2020-08-22 05:25:43,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:25:43,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:25:43,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:25:43,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:25:43,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (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 [2020-08-22 05:25:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:25:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:25:44,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 05:25:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 05:25:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 05:25:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 05:25:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:25:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:25:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 05:25:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 05:25:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 05:25:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 05:25:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 05:25:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 05:25:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:25:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:25:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:25:44,479 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:25:44,480 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 05:25:44,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:25:44 BoogieIcfgContainer [2020-08-22 05:25:44,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:25:44,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:25:44,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:25:44,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:25:44,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:25:43" (1/3) ... [2020-08-22 05:25:44,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b931a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:25:44, skipping insertion in model container [2020-08-22 05:25:44,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:25:43" (2/3) ... [2020-08-22 05:25:44,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b931a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:25:44, skipping insertion in model container [2020-08-22 05:25:44,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:25:44" (3/3) ... [2020-08-22 05:25:44,493 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-22 05:25:44,503 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:25:44,511 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:25:44,525 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:25:44,546 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:25:44,546 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:25:44,546 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:25:44,547 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:25:44,547 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:25:44,547 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:25:44,547 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:25:44,547 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:25:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 05:25:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 05:25:44,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:44,574 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] [2020-08-22 05:25:44,574 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 05:25:44,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:44,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410075624] [2020-08-22 05:25:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:44,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:44,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:44,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 05:25:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 05:25:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:44,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 05:25:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:44,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410075624] [2020-08-22 05:25:44,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:44,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 05:25:44,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7295320] [2020-08-22 05:25:44,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 05:25:44,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 05:25:44,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 05:25:44,945 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-22 05:25:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:45,109 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-22 05:25:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:25:45,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-22 05:25:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:45,124 INFO L225 Difference]: With dead ends: 136 [2020-08-22 05:25:45,124 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 05:25:45,129 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 [2020-08-22 05:25:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 05:25:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-22 05:25:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 05:25:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-22 05:25:45,182 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-22 05:25:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:45,183 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-22 05:25:45,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 05:25:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-22 05:25:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 05:25:45,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:45,187 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] [2020-08-22 05:25:45,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:25:45,188 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:45,188 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-22 05:25:45,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:45,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316207455] [2020-08-22 05:25:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 05:25:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 05:25:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:25:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:45,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316207455] [2020-08-22 05:25:45,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:45,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 05:25:45,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543494011] [2020-08-22 05:25:45,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 05:25:45,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 05:25:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 05:25:45,357 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-22 05:25:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:45,444 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-22 05:25:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 05:25:45,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-22 05:25:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:45,448 INFO L225 Difference]: With dead ends: 129 [2020-08-22 05:25:45,448 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 05:25:45,450 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 [2020-08-22 05:25:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 05:25:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-22 05:25:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 05:25:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-22 05:25:45,484 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-22 05:25:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:45,485 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-22 05:25:45,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 05:25:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-22 05:25:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 05:25:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:45,488 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] [2020-08-22 05:25:45,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:25:45,489 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-22 05:25:45,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:45,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722516686] [2020-08-22 05:25:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 05:25:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 05:25:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 05:25:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:45,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722516686] [2020-08-22 05:25:45,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:45,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 05:25:45,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223898843] [2020-08-22 05:25:45,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 05:25:45,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 05:25:45,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:25:45,660 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-22 05:25:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:45,805 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-22 05:25:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:25:45,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-22 05:25:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:45,808 INFO L225 Difference]: With dead ends: 145 [2020-08-22 05:25:45,808 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 05:25:45,809 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 [2020-08-22 05:25:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 05:25:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-22 05:25:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 05:25:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-22 05:25:45,828 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-22 05:25:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:45,829 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-22 05:25:45,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 05:25:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-22 05:25:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 05:25:45,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:45,832 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] [2020-08-22 05:25:45,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:25:45,832 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-22 05:25:45,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:45,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470231126] [2020-08-22 05:25:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 05:25:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 05:25:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:25:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:45,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470231126] [2020-08-22 05:25:45,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:45,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 05:25:45,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363341897] [2020-08-22 05:25:45,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 05:25:45,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 05:25:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:25:45,956 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-22 05:25:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:46,025 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-22 05:25:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:25:46,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-22 05:25:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:46,028 INFO L225 Difference]: With dead ends: 156 [2020-08-22 05:25:46,028 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 05:25:46,029 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 [2020-08-22 05:25:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 05:25:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-22 05:25:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 05:25:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-22 05:25:46,044 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-22 05:25:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:46,044 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-22 05:25:46,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 05:25:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-22 05:25:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 05:25:46,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:46,047 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] [2020-08-22 05:25:46,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:25:46,048 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-22 05:25:46,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:46,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425638148] [2020-08-22 05:25:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 05:25:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 05:25:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 05:25:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:46,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425638148] [2020-08-22 05:25:46,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:46,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 05:25:46,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670354871] [2020-08-22 05:25:46,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:25:46,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:25:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:25:46,206 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-22 05:25:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:46,355 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-22 05:25:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:25:46,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 05:25:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:46,358 INFO L225 Difference]: With dead ends: 166 [2020-08-22 05:25:46,358 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 05:25:46,359 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 [2020-08-22 05:25:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 05:25:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-22 05:25:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 05:25:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-22 05:25:46,379 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-22 05:25:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:46,379 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-22 05:25:46,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:25:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-22 05:25:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 05:25:46,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:46,383 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] [2020-08-22 05:25:46,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:25:46,383 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-22 05:25:46,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:46,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324938833] [2020-08-22 05:25:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 05:25:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 05:25:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 05:25:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:46,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324938833] [2020-08-22 05:25:46,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:46,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 05:25:46,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285809565] [2020-08-22 05:25:46,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:25:46,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:46,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:25:46,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:25:46,509 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-22 05:25:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:46,631 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 05:25:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:25:46,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-22 05:25:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:46,633 INFO L225 Difference]: With dead ends: 176 [2020-08-22 05:25:46,633 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 05:25:46,635 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 [2020-08-22 05:25:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 05:25:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-22 05:25:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 05:25:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-22 05:25:46,648 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-22 05:25:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:46,648 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-22 05:25:46,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:25:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-22 05:25:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 05:25:46,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:46,654 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] [2020-08-22 05:25:46,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:25:46,654 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:46,655 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-22 05:25:46,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:46,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816442334] [2020-08-22 05:25:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 05:25:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:25:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 05:25:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:46,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816442334] [2020-08-22 05:25:46,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:46,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 05:25:46,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235880336] [2020-08-22 05:25:46,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:25:46,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:25:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:25:46,803 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-22 05:25:46,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:46,995 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-22 05:25:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:25:46,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-22 05:25:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:46,998 INFO L225 Difference]: With dead ends: 178 [2020-08-22 05:25:46,998 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 05:25:46,999 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 [2020-08-22 05:25:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 05:25:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-22 05:25:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 05:25:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-22 05:25:47,012 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-22 05:25:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:47,012 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-22 05:25:47,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:25:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-22 05:25:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 05:25:47,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:47,014 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] [2020-08-22 05:25:47,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:25:47,014 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-22 05:25:47,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:47,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963469421] [2020-08-22 05:25:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 05:25:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 05:25:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 05:25:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:47,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963469421] [2020-08-22 05:25:47,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:47,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 05:25:47,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024388593] [2020-08-22 05:25:47,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:25:47,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:25:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:25:47,123 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-22 05:25:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:47,216 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-22 05:25:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:25:47,217 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-22 05:25:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:47,219 INFO L225 Difference]: With dead ends: 193 [2020-08-22 05:25:47,219 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 05:25:47,220 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 [2020-08-22 05:25:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 05:25:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-22 05:25:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 05:25:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-22 05:25:47,231 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-22 05:25:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:47,231 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-22 05:25:47,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:25:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-22 05:25:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 05:25:47,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:47,233 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] [2020-08-22 05:25:47,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:25:47,233 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:47,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-22 05:25:47,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:47,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696341] [2020-08-22 05:25:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 05:25:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:25:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 05:25:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:47,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696341] [2020-08-22 05:25:47,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:47,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 05:25:47,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318752422] [2020-08-22 05:25:47,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:25:47,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:47,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:25:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:25:47,392 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-22 05:25:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:47,595 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-22 05:25:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:25:47,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-22 05:25:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:47,598 INFO L225 Difference]: With dead ends: 190 [2020-08-22 05:25:47,599 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 05:25:47,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:25:47,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 05:25:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-22 05:25:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 05:25:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-22 05:25:47,611 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-22 05:25:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:47,612 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-22 05:25:47,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:25:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-22 05:25:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 05:25:47,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:47,613 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] [2020-08-22 05:25:47,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:25:47,614 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-22 05:25:47,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:47,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876249493] [2020-08-22 05:25:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 05:25:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 05:25:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 05:25:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:47,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876249493] [2020-08-22 05:25:47,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:47,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 05:25:47,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188541302] [2020-08-22 05:25:47,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:25:47,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:25:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:25:47,732 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-22 05:25:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:47,840 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-22 05:25:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:25:47,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 05:25:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:47,842 INFO L225 Difference]: With dead ends: 210 [2020-08-22 05:25:47,842 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 05:25:47,843 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 [2020-08-22 05:25:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 05:25:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-22 05:25:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 05:25:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-22 05:25:47,853 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-22 05:25:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:47,853 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-22 05:25:47,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:25:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-22 05:25:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 05:25:47,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:47,855 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] [2020-08-22 05:25:47,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:25:47,855 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-22 05:25:47,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:47,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574507932] [2020-08-22 05:25:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:47,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 05:25:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 05:25:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 05:25:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:48,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574507932] [2020-08-22 05:25:48,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:48,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:25:48,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195289389] [2020-08-22 05:25:48,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:25:48,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:48,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:25:48,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:25:48,032 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-22 05:25:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:48,177 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-22 05:25:48,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:25:48,178 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 05:25:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:48,180 INFO L225 Difference]: With dead ends: 202 [2020-08-22 05:25:48,180 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 05:25:48,181 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 [2020-08-22 05:25:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 05:25:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-22 05:25:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 05:25:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-22 05:25:48,191 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-22 05:25:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:48,192 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-22 05:25:48,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:25:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-22 05:25:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 05:25:48,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:48,193 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] [2020-08-22 05:25:48,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:25:48,194 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:48,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-22 05:25:48,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:48,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114937318] [2020-08-22 05:25:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 05:25:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 05:25:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 05:25:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:48,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114937318] [2020-08-22 05:25:48,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:48,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:25:48,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759852627] [2020-08-22 05:25:48,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:25:48,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:48,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:25:48,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:25:48,335 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-22 05:25:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:48,449 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-22 05:25:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:25:48,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 05:25:48,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:48,451 INFO L225 Difference]: With dead ends: 227 [2020-08-22 05:25:48,451 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 05:25:48,452 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 [2020-08-22 05:25:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 05:25:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-22 05:25:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 05:25:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-22 05:25:48,464 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-22 05:25:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:48,465 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-22 05:25:48,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:25:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-22 05:25:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 05:25:48,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:48,467 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] [2020-08-22 05:25:48,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 05:25:48,467 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-22 05:25:48,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:48,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686669414] [2020-08-22 05:25:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 05:25:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 05:25:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 05:25:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:48,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686669414] [2020-08-22 05:25:48,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:48,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:25:48,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167819096] [2020-08-22 05:25:48,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:25:48,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:25:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:25:48,661 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-22 05:25:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:48,873 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-22 05:25:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:25:48,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-22 05:25:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:48,876 INFO L225 Difference]: With dead ends: 214 [2020-08-22 05:25:48,876 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 05:25:48,877 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 [2020-08-22 05:25:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 05:25:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-22 05:25:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 05:25:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-22 05:25:48,888 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-22 05:25:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:48,888 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-22 05:25:48,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:25:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-22 05:25:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 05:25:48,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:48,890 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] [2020-08-22 05:25:48,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 05:25:48,890 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:48,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:48,891 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-22 05:25:48,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:48,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266338644] [2020-08-22 05:25:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:48,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 05:25:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 05:25:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 05:25:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:49,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266338644] [2020-08-22 05:25:49,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:49,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:25:49,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762438358] [2020-08-22 05:25:49,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:25:49,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:25:49,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:25:49,041 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-22 05:25:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:49,166 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-22 05:25:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:25:49,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 05:25:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:49,169 INFO L225 Difference]: With dead ends: 244 [2020-08-22 05:25:49,169 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 05:25:49,170 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 [2020-08-22 05:25:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 05:25:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-22 05:25:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 05:25:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-22 05:25:49,182 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-22 05:25:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:49,183 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-22 05:25:49,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:25:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-22 05:25:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 05:25:49,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:49,184 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] [2020-08-22 05:25:49,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 05:25:49,185 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-22 05:25:49,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:49,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935790395] [2020-08-22 05:25:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 05:25:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 05:25:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 05:25:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:49,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935790395] [2020-08-22 05:25:49,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:49,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 05:25:49,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388770039] [2020-08-22 05:25:49,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 05:25:49,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:49,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 05:25:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:25:49,386 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-22 05:25:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:49,622 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-22 05:25:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:25:49,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-22 05:25:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:49,625 INFO L225 Difference]: With dead ends: 226 [2020-08-22 05:25:49,625 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 05:25:49,626 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 [2020-08-22 05:25:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 05:25:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-22 05:25:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 05:25:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-22 05:25:49,637 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-22 05:25:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:49,638 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-22 05:25:49,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 05:25:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-22 05:25:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 05:25:49,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:49,639 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] [2020-08-22 05:25:49,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 05:25:49,639 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-22 05:25:49,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:49,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278985392] [2020-08-22 05:25:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 05:25:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 05:25:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 05:25:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:49,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278985392] [2020-08-22 05:25:49,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:49,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 05:25:49,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172806674] [2020-08-22 05:25:49,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 05:25:49,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 05:25:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:25:49,800 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-22 05:25:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:49,923 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-22 05:25:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:25:49,923 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-22 05:25:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:49,925 INFO L225 Difference]: With dead ends: 261 [2020-08-22 05:25:49,925 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 05:25:49,926 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 [2020-08-22 05:25:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 05:25:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-22 05:25:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 05:25:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-22 05:25:49,939 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-22 05:25:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:49,939 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-22 05:25:49,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 05:25:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-22 05:25:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 05:25:49,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:49,941 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] [2020-08-22 05:25:49,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 05:25:49,941 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-22 05:25:49,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:49,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912243677] [2020-08-22 05:25:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:49,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 05:25:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 05:25:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 05:25:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:50,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912243677] [2020-08-22 05:25:50,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:50,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:25:50,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773710811] [2020-08-22 05:25:50,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:25:50,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:50,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:25:50,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:25:50,211 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-22 05:25:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:50,457 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-22 05:25:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 05:25:50,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-22 05:25:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:50,460 INFO L225 Difference]: With dead ends: 238 [2020-08-22 05:25:50,460 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 05:25:50,461 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 [2020-08-22 05:25:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 05:25:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-22 05:25:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 05:25:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-22 05:25:50,472 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-22 05:25:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:50,472 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-22 05:25:50,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:25:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-22 05:25:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 05:25:50,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:50,474 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] [2020-08-22 05:25:50,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 05:25:50,474 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-22 05:25:50,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:50,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369663772] [2020-08-22 05:25:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 05:25:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 05:25:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 05:25:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:50,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369663772] [2020-08-22 05:25:50,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:50,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:25:50,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562566089] [2020-08-22 05:25:50,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:25:50,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:25:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:25:50,631 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-22 05:25:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:50,778 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-22 05:25:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 05:25:50,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-22 05:25:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:50,780 INFO L225 Difference]: With dead ends: 278 [2020-08-22 05:25:50,780 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 05:25:50,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:25:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 05:25:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-22 05:25:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 05:25:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-22 05:25:50,794 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-22 05:25:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:50,794 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-22 05:25:50,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:25:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-22 05:25:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 05:25:50,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:50,795 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] [2020-08-22 05:25:50,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 05:25:50,796 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-22 05:25:50,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:50,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989540140] [2020-08-22 05:25:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:50,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 05:25:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 05:25:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 05:25:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:51,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989540140] [2020-08-22 05:25:51,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:51,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:25:51,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959469083] [2020-08-22 05:25:51,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:25:51,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:25:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:25:51,109 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-22 05:25:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:51,430 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-22 05:25:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 05:25:51,431 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-22 05:25:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:51,433 INFO L225 Difference]: With dead ends: 250 [2020-08-22 05:25:51,433 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 05:25:51,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:25:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 05:25:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-22 05:25:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 05:25:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-22 05:25:51,446 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-22 05:25:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:51,446 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-22 05:25:51,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:25:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-22 05:25:51,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 05:25:51,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:51,448 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] [2020-08-22 05:25:51,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 05:25:51,449 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:51,449 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-22 05:25:51,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:51,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398777] [2020-08-22 05:25:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 05:25:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 05:25:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 05:25:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:51,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398777] [2020-08-22 05:25:51,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:51,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:25:51,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243040452] [2020-08-22 05:25:51,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:25:51,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:51,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:25:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:25:51,627 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-22 05:25:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:51,768 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-22 05:25:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 05:25:51,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-22 05:25:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:51,770 INFO L225 Difference]: With dead ends: 295 [2020-08-22 05:25:51,770 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 05:25:51,771 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 [2020-08-22 05:25:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 05:25:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-22 05:25:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 05:25:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-22 05:25:51,783 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-22 05:25:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:51,784 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-22 05:25:51,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:25:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-22 05:25:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 05:25:51,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:51,785 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] [2020-08-22 05:25:51,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 05:25:51,786 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-22 05:25:51,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:51,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73621804] [2020-08-22 05:25:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:51,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 05:25:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 05:25:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 05:25:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:52,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73621804] [2020-08-22 05:25:52,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:52,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 05:25:52,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749761452] [2020-08-22 05:25:52,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 05:25:52,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 05:25:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:25:52,091 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-22 05:25:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:52,493 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-22 05:25:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 05:25:52,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 05:25:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:52,496 INFO L225 Difference]: With dead ends: 262 [2020-08-22 05:25:52,496 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 05:25:52,497 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 [2020-08-22 05:25:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 05:25:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-22 05:25:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 05:25:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-22 05:25:52,511 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-22 05:25:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:52,512 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-22 05:25:52,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 05:25:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-22 05:25:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 05:25:52,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:52,513 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] [2020-08-22 05:25:52,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 05:25:52,515 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:52,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-22 05:25:52,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:52,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703103626] [2020-08-22 05:25:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 05:25:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 05:25:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 05:25:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:52,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703103626] [2020-08-22 05:25:52,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:52,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 05:25:52,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720510838] [2020-08-22 05:25:52,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 05:25:52,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:52,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 05:25:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:25:52,746 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-22 05:25:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:52,933 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-22 05:25:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 05:25:52,936 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 05:25:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:52,939 INFO L225 Difference]: With dead ends: 312 [2020-08-22 05:25:52,939 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 05:25:52,940 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 [2020-08-22 05:25:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 05:25:52,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-22 05:25:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 05:25:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-22 05:25:52,957 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-22 05:25:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:52,957 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-22 05:25:52,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 05:25:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-22 05:25:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 05:25:52,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:52,960 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] [2020-08-22 05:25:52,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 05:25:52,960 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-22 05:25:52,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:52,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082417897] [2020-08-22 05:25:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:52,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 05:25:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 05:25:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 05:25:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:53,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082417897] [2020-08-22 05:25:53,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:53,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 05:25:53,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654449155] [2020-08-22 05:25:53,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 05:25:53,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:53,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 05:25:53,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:25:53,302 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-22 05:25:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:53,741 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-22 05:25:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 05:25:53,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-22 05:25:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:53,744 INFO L225 Difference]: With dead ends: 274 [2020-08-22 05:25:53,744 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 05:25:53,745 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 [2020-08-22 05:25:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 05:25:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-22 05:25:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 05:25:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-22 05:25:53,760 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-22 05:25:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:53,761 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-22 05:25:53,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 05:25:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-22 05:25:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 05:25:53,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:53,763 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] [2020-08-22 05:25:53,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 05:25:53,764 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-22 05:25:53,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:53,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802971792] [2020-08-22 05:25:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 05:25:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 05:25:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 05:25:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:53,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802971792] [2020-08-22 05:25:53,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:53,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 05:25:53,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061658411] [2020-08-22 05:25:53,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 05:25:53,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:53,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 05:25:53,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:25:53,989 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-22 05:25:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:54,173 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-22 05:25:54,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 05:25:54,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-22 05:25:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:54,176 INFO L225 Difference]: With dead ends: 329 [2020-08-22 05:25:54,176 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 05:25:54,177 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 [2020-08-22 05:25:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 05:25:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-22 05:25:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 05:25:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-22 05:25:54,195 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-22 05:25:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:54,195 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-22 05:25:54,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 05:25:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-22 05:25:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 05:25:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:54,197 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] [2020-08-22 05:25:54,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 05:25:54,200 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-22 05:25:54,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:54,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831139408] [2020-08-22 05:25:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 05:25:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 05:25:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 05:25:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:54,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831139408] [2020-08-22 05:25:54,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:54,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 05:25:54,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770649892] [2020-08-22 05:25:54,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 05:25:54,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:54,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 05:25:54,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 05:25:54,577 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-22 05:25:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:55,039 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-22 05:25:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 05:25:55,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 05:25:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:55,042 INFO L225 Difference]: With dead ends: 286 [2020-08-22 05:25:55,042 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 05:25:55,043 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 [2020-08-22 05:25:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 05:25:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-22 05:25:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 05:25:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-22 05:25:55,058 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-22 05:25:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:55,058 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-22 05:25:55,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 05:25:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-22 05:25:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 05:25:55,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:55,060 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] [2020-08-22 05:25:55,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 05:25:55,060 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-22 05:25:55,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:55,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067498325] [2020-08-22 05:25:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 05:25:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 05:25:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 05:25:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:55,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067498325] [2020-08-22 05:25:55,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:55,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 05:25:55,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768480591] [2020-08-22 05:25:55,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 05:25:55,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 05:25:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 05:25:55,331 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-22 05:25:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:55,540 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-22 05:25:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 05:25:55,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-22 05:25:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:55,544 INFO L225 Difference]: With dead ends: 346 [2020-08-22 05:25:55,544 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 05:25:55,546 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 [2020-08-22 05:25:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 05:25:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-22 05:25:55,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 05:25:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-22 05:25:55,564 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-22 05:25:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:55,565 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-22 05:25:55,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 05:25:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-22 05:25:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 05:25:55,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:55,566 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] [2020-08-22 05:25:55,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 05:25:55,567 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:55,567 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-22 05:25:55,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:55,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110044517] [2020-08-22 05:25:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 05:25:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 05:25:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 05:25:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 05:25:55,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110044517] [2020-08-22 05:25:55,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:25:55,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:25:55,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306049545] [2020-08-22 05:25:55,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:25:55,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:25:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:25:55,640 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-22 05:25:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:55,653 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-22 05:25:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:25:55,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 05:25:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:55,657 INFO L225 Difference]: With dead ends: 160 [2020-08-22 05:25:55,657 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 05:25:55,657 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 [2020-08-22 05:25:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 05:25:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 05:25:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 05:25:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-22 05:25:55,670 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-22 05:25:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:55,671 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-22 05:25:55,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:25:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-22 05:25:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 05:25:55,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:55,672 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] [2020-08-22 05:25:55,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 05:25:55,673 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:55,673 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-22 05:25:55,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:55,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409707154] [2020-08-22 05:25:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 05:25:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 05:25:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 05:25:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 05:25:55,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409707154] [2020-08-22 05:25:55,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:25:55,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 05:25:55,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103246713] [2020-08-22 05:25:55,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 05:25:55,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 05:25:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 05:25:55,766 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-22 05:25:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:55,790 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-22 05:25:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 05:25:55,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-22 05:25:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:55,792 INFO L225 Difference]: With dead ends: 161 [2020-08-22 05:25:55,792 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 05:25:55,793 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 [2020-08-22 05:25:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 05:25:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 05:25:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 05:25:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-22 05:25:55,804 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-22 05:25:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:55,804 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-22 05:25:55,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 05:25:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-22 05:25:55,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 05:25:55,806 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:55,806 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] [2020-08-22 05:25:55,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 05:25:55,806 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:55,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-22 05:25:55,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:55,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096831039] [2020-08-22 05:25:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:55,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 05:25:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 05:25:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 05:25:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:56,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096831039] [2020-08-22 05:25:56,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:56,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 05:25:56,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099461823] [2020-08-22 05:25:56,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 05:25:56,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:56,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 05:25:56,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 05:25:56,223 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-22 05:25:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:56,774 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-22 05:25:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 05:25:56,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-22 05:25:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:56,777 INFO L225 Difference]: With dead ends: 298 [2020-08-22 05:25:56,777 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 05:25:56,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:25:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 05:25:56,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-22 05:25:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 05:25:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-22 05:25:56,796 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-22 05:25:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:56,796 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-22 05:25:56,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 05:25:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-22 05:25:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 05:25:56,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:56,798 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] [2020-08-22 05:25:56,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 05:25:56,798 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:56,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-22 05:25:56,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:56,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438142944] [2020-08-22 05:25:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:56,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 05:25:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 05:25:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 05:25:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:57,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438142944] [2020-08-22 05:25:57,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:57,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 05:25:57,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911676699] [2020-08-22 05:25:57,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 05:25:57,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:57,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 05:25:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 05:25:57,121 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-22 05:25:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:57,336 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-22 05:25:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 05:25:57,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-22 05:25:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:57,339 INFO L225 Difference]: With dead ends: 363 [2020-08-22 05:25:57,339 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 05:25:57,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:25:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 05:25:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-22 05:25:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 05:25:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-22 05:25:57,357 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-22 05:25:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:57,358 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-22 05:25:57,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 05:25:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-22 05:25:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 05:25:57,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:57,359 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] [2020-08-22 05:25:57,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 05:25:57,360 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-22 05:25:57,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:57,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473397579] [2020-08-22 05:25:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 05:25:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 05:25:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 05:25:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:57,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473397579] [2020-08-22 05:25:57,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:57,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 05:25:57,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943385235] [2020-08-22 05:25:57,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 05:25:57,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:57,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 05:25:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:25:57,844 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-22 05:25:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:58,403 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-22 05:25:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 05:25:58,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-22 05:25:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:58,405 INFO L225 Difference]: With dead ends: 310 [2020-08-22 05:25:58,406 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 05:25:58,406 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 [2020-08-22 05:25:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 05:25:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-22 05:25:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 05:25:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-22 05:25:58,419 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-22 05:25:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:58,419 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-22 05:25:58,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 05:25:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-22 05:25:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 05:25:58,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:58,421 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] [2020-08-22 05:25:58,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 05:25:58,421 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-22 05:25:58,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:58,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686949306] [2020-08-22 05:25:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:58,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:58,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:58,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:58,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 05:25:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:58,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 05:25:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:58,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 05:25:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:58,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686949306] [2020-08-22 05:25:58,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:58,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 05:25:58,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39073945] [2020-08-22 05:25:58,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 05:25:58,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:58,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 05:25:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:25:58,754 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-22 05:25:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:25:58,976 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-22 05:25:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 05:25:58,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 05:25:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:25:58,979 INFO L225 Difference]: With dead ends: 380 [2020-08-22 05:25:58,979 INFO L226 Difference]: Without dead ends: 278 [2020-08-22 05:25:58,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:25:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-22 05:25:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-22 05:25:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 05:25:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-22 05:25:58,999 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-22 05:25:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:25:58,999 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-22 05:25:58,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 05:25:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-22 05:25:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 05:25:59,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:25:59,002 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] [2020-08-22 05:25:59,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 05:25:59,002 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:25:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:25:59,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-22 05:25:59,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:25:59,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280474530] [2020-08-22 05:25:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:25:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:59,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:25:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:59,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:25:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:59,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:25:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:59,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 05:25:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 05:25:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:59,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 05:25:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:25:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:25:59,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280474530] [2020-08-22 05:25:59,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:25:59,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 05:25:59,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034820337] [2020-08-22 05:25:59,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 05:25:59,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:25:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 05:25:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:25:59,446 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-22 05:26:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:00,256 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-22 05:26:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 05:26:00,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 05:26:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:00,262 INFO L225 Difference]: With dead ends: 322 [2020-08-22 05:26:00,265 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 05:26:00,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-22 05:26:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 05:26:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-22 05:26:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 05:26:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-22 05:26:00,283 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-22 05:26:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:00,283 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-22 05:26:00,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 05:26:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-22 05:26:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 05:26:00,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:00,285 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] [2020-08-22 05:26:00,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 05:26:00,286 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-22 05:26:00,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:00,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249435248] [2020-08-22 05:26:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:00,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:00,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:00,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:00,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 05:26:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:00,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 05:26:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:00,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 05:26:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:00,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249435248] [2020-08-22 05:26:00,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:00,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 05:26:00,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011135236] [2020-08-22 05:26:00,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 05:26:00,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 05:26:00,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:26:00,690 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-22 05:26:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:01,066 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-22 05:26:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 05:26:01,067 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-22 05:26:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:01,069 INFO L225 Difference]: With dead ends: 397 [2020-08-22 05:26:01,069 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 05:26:01,074 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 [2020-08-22 05:26:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 05:26:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-22 05:26:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 05:26:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-22 05:26:01,103 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-22 05:26:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:01,104 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-22 05:26:01,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 05:26:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-22 05:26:01,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 05:26:01,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:01,106 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] [2020-08-22 05:26:01,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 05:26:01,107 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:01,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-22 05:26:01,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:01,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121556185] [2020-08-22 05:26:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:01,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:01,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:01,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:01,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 05:26:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:01,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 05:26:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:01,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 05:26:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:01,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121556185] [2020-08-22 05:26:01,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:01,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 05:26:01,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913899141] [2020-08-22 05:26:01,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 05:26:01,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:01,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 05:26:01,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 05:26:01,757 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-22 05:26:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:02,453 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-22 05:26:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 05:26:02,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-22 05:26:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:02,455 INFO L225 Difference]: With dead ends: 334 [2020-08-22 05:26:02,456 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 05:26:02,456 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 [2020-08-22 05:26:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 05:26:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-22 05:26:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 05:26:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-22 05:26:02,477 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-22 05:26:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:02,477 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-22 05:26:02,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 05:26:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-22 05:26:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 05:26:02,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:02,479 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] [2020-08-22 05:26:02,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 05:26:02,479 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-22 05:26:02,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:02,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781469841] [2020-08-22 05:26:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 05:26:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 05:26:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 05:26:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:02,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781469841] [2020-08-22 05:26:02,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:02,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 05:26:02,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176469674] [2020-08-22 05:26:02,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 05:26:02,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 05:26:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 05:26:02,861 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-22 05:26:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:03,234 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-22 05:26:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 05:26:03,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-22 05:26:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:03,238 INFO L225 Difference]: With dead ends: 414 [2020-08-22 05:26:03,238 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 05:26:03,239 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 [2020-08-22 05:26:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 05:26:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-22 05:26:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 05:26:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-22 05:26:03,254 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-22 05:26:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:03,254 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-22 05:26:03,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 05:26:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-22 05:26:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 05:26:03,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:03,256 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] [2020-08-22 05:26:03,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 05:26:03,257 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-22 05:26:03,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:03,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436471216] [2020-08-22 05:26:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 05:26:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 05:26:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 05:26:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:03,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436471216] [2020-08-22 05:26:03,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:03,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 05:26:03,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941252086] [2020-08-22 05:26:03,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 05:26:03,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:03,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 05:26:03,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 05:26:03,778 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-22 05:26:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:04,567 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-22 05:26:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 05:26:04,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-22 05:26:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:04,570 INFO L225 Difference]: With dead ends: 346 [2020-08-22 05:26:04,570 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 05:26:04,571 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 [2020-08-22 05:26:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 05:26:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-22 05:26:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 05:26:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-22 05:26:04,587 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-22 05:26:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:04,587 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-22 05:26:04,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 05:26:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-22 05:26:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 05:26:04,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:04,589 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] [2020-08-22 05:26:04,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 05:26:04,589 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-22 05:26:04,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:04,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726738516] [2020-08-22 05:26:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 05:26:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 05:26:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 05:26:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:04,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726738516] [2020-08-22 05:26:04,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:04,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 05:26:04,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530985230] [2020-08-22 05:26:04,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 05:26:04,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:04,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 05:26:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 05:26:04,967 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-22 05:26:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:05,273 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-22 05:26:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 05:26:05,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-22 05:26:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:05,276 INFO L225 Difference]: With dead ends: 431 [2020-08-22 05:26:05,276 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 05:26:05,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 05:26:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 05:26:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-22 05:26:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-22 05:26:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-22 05:26:05,292 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-22 05:26:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:05,293 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-22 05:26:05,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 05:26:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-22 05:26:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 05:26:05,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:05,294 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] [2020-08-22 05:26:05,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 05:26:05,295 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-22 05:26:05,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:05,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172549645] [2020-08-22 05:26:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 05:26:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 05:26:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 05:26:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:05,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172549645] [2020-08-22 05:26:05,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:05,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 05:26:05,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864567736] [2020-08-22 05:26:05,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 05:26:05,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:05,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 05:26:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 05:26:05,848 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-22 05:26:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:06,647 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-22 05:26:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 05:26:06,649 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-22 05:26:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:06,652 INFO L225 Difference]: With dead ends: 358 [2020-08-22 05:26:06,653 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 05:26:06,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:26:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 05:26:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-22 05:26:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 05:26:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-22 05:26:06,675 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-22 05:26:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:06,676 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-22 05:26:06,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 05:26:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-22 05:26:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 05:26:06,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:06,678 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] [2020-08-22 05:26:06,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 05:26:06,678 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-22 05:26:06,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:06,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101351890] [2020-08-22 05:26:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 05:26:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 05:26:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:07,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101351890] [2020-08-22 05:26:07,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:07,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 05:26:07,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858225901] [2020-08-22 05:26:07,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 05:26:07,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 05:26:07,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 05:26:07,099 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-22 05:26:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:07,367 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-22 05:26:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 05:26:07,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-22 05:26:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:07,372 INFO L225 Difference]: With dead ends: 448 [2020-08-22 05:26:07,372 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 05:26:07,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:26:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 05:26:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-22 05:26:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 05:26:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-22 05:26:07,390 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-22 05:26:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:07,390 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-22 05:26:07,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 05:26:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-22 05:26:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 05:26:07,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:07,392 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] [2020-08-22 05:26:07,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 05:26:07,393 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-22 05:26:07,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:07,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046812152] [2020-08-22 05:26:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:07,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 05:26:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 05:26:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 05:26:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:08,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046812152] [2020-08-22 05:26:08,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:08,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 05:26:08,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255754222] [2020-08-22 05:26:08,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 05:26:08,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:08,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 05:26:08,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:26:08,068 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-22 05:26:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:08,985 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-22 05:26:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 05:26:08,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-22 05:26:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:08,990 INFO L225 Difference]: With dead ends: 370 [2020-08-22 05:26:08,991 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 05:26:08,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 05:26:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 05:26:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-22 05:26:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 05:26:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-22 05:26:09,032 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-22 05:26:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:09,032 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-22 05:26:09,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 05:26:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-22 05:26:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 05:26:09,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:09,035 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] [2020-08-22 05:26:09,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 05:26:09,035 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:09,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:09,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-22 05:26:09,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:09,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685038179] [2020-08-22 05:26:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 05:26:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 05:26:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 05:26:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:09,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685038179] [2020-08-22 05:26:09,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:09,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 05:26:09,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982576084] [2020-08-22 05:26:09,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 05:26:09,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 05:26:09,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:26:09,521 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-22 05:26:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:09,968 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-22 05:26:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 05:26:09,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-22 05:26:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:09,971 INFO L225 Difference]: With dead ends: 465 [2020-08-22 05:26:09,971 INFO L226 Difference]: Without dead ends: 348 [2020-08-22 05:26:09,972 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 [2020-08-22 05:26:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-22 05:26:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-22 05:26:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 05:26:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-22 05:26:09,994 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-22 05:26:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:09,995 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-22 05:26:09,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 05:26:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-22 05:26:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 05:26:09,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:09,998 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] [2020-08-22 05:26:09,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 05:26:09,998 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-22 05:26:09,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:09,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205832833] [2020-08-22 05:26:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 05:26:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 05:26:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 05:26:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:10,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205832833] [2020-08-22 05:26:10,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:10,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 05:26:10,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266259248] [2020-08-22 05:26:10,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 05:26:10,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:10,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 05:26:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 05:26:10,745 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-22 05:26:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:11,926 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-22 05:26:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 05:26:11,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-22 05:26:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:11,929 INFO L225 Difference]: With dead ends: 382 [2020-08-22 05:26:11,930 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 05:26:11,932 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 [2020-08-22 05:26:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 05:26:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-22 05:26:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 05:26:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-22 05:26:11,950 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-22 05:26:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:11,951 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-22 05:26:11,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 05:26:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-22 05:26:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 05:26:11,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:11,953 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] [2020-08-22 05:26:11,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 05:26:11,954 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-22 05:26:11,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:11,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26081533] [2020-08-22 05:26:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:11,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:11,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:11,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 05:26:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 05:26:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 05:26:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:12,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26081533] [2020-08-22 05:26:12,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:12,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 05:26:12,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264251936] [2020-08-22 05:26:12,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 05:26:12,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 05:26:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 05:26:12,411 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-22 05:26:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:12,840 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-22 05:26:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 05:26:12,843 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-22 05:26:12,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:12,846 INFO L225 Difference]: With dead ends: 482 [2020-08-22 05:26:12,846 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 05:26:12,847 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 [2020-08-22 05:26:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 05:26:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-22 05:26:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 05:26:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-22 05:26:12,866 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-22 05:26:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:12,866 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-22 05:26:12,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 05:26:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-22 05:26:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 05:26:12,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:12,868 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] [2020-08-22 05:26:12,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 05:26:12,869 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-22 05:26:12,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:12,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110970981] [2020-08-22 05:26:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:12,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 05:26:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 05:26:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 05:26:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:13,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110970981] [2020-08-22 05:26:13,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:13,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 05:26:13,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625929996] [2020-08-22 05:26:13,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 05:26:13,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:13,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 05:26:13,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 05:26:13,541 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-22 05:26:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:14,753 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-22 05:26:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 05:26:14,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-22 05:26:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:14,758 INFO L225 Difference]: With dead ends: 394 [2020-08-22 05:26:14,759 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 05:26:14,760 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 [2020-08-22 05:26:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 05:26:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-22 05:26:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 05:26:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-22 05:26:14,777 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-22 05:26:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:14,778 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-22 05:26:14,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 05:26:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-22 05:26:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 05:26:14,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:14,779 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] [2020-08-22 05:26:14,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 05:26:14,780 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:14,780 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-22 05:26:14,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:14,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217804594] [2020-08-22 05:26:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:14,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 05:26:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 05:26:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 05:26:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:15,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217804594] [2020-08-22 05:26:15,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:15,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 05:26:15,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122949995] [2020-08-22 05:26:15,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 05:26:15,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:15,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 05:26:15,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 05:26:15,304 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-22 05:26:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:15,650 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-22 05:26:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 05:26:15,650 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-22 05:26:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:15,653 INFO L225 Difference]: With dead ends: 499 [2020-08-22 05:26:15,654 INFO L226 Difference]: Without dead ends: 376 [2020-08-22 05:26:15,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 05:26:15,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-22 05:26:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-22 05:26:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-22 05:26:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-22 05:26:15,675 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-22 05:26:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:15,676 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-22 05:26:15,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 05:26:15,676 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-22 05:26:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 05:26:15,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:15,677 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] [2020-08-22 05:26:15,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 05:26:15,678 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:15,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-22 05:26:15,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:15,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810156509] [2020-08-22 05:26:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:15,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 05:26:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 05:26:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 05:26:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:16,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810156509] [2020-08-22 05:26:16,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:16,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 05:26:16,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431065763] [2020-08-22 05:26:16,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 05:26:16,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 05:26:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 05:26:16,380 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-22 05:26:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:17,731 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-22 05:26:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 05:26:17,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-22 05:26:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:17,736 INFO L225 Difference]: With dead ends: 406 [2020-08-22 05:26:17,736 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 05:26:17,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 05:26:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 05:26:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-22 05:26:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 05:26:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-22 05:26:17,760 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-22 05:26:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:17,760 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-22 05:26:17,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 05:26:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-22 05:26:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 05:26:17,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:17,762 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] [2020-08-22 05:26:17,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 05:26:17,762 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:17,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-22 05:26:17,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:17,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78380401] [2020-08-22 05:26:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:17,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:17,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:17,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 05:26:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 05:26:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 05:26:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:18,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78380401] [2020-08-22 05:26:18,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:18,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 05:26:18,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094832664] [2020-08-22 05:26:18,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 05:26:18,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 05:26:18,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 05:26:18,279 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-22 05:26:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:18,754 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-22 05:26:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 05:26:18,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-22 05:26:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:18,757 INFO L225 Difference]: With dead ends: 516 [2020-08-22 05:26:18,758 INFO L226 Difference]: Without dead ends: 390 [2020-08-22 05:26:18,759 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 [2020-08-22 05:26:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-22 05:26:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-22 05:26:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 05:26:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-22 05:26:18,780 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-22 05:26:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:18,780 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-22 05:26:18,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 05:26:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-22 05:26:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 05:26:18,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:18,783 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] [2020-08-22 05:26:18,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 05:26:18,783 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-22 05:26:18,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:18,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821427167] [2020-08-22 05:26:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:18,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 05:26:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 05:26:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 05:26:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:19,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821427167] [2020-08-22 05:26:19,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:19,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 05:26:19,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177876466] [2020-08-22 05:26:19,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 05:26:19,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 05:26:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 05:26:19,515 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-22 05:26:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:20,925 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-22 05:26:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 05:26:20,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-22 05:26:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:20,928 INFO L225 Difference]: With dead ends: 418 [2020-08-22 05:26:20,928 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 05:26:20,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 05:26:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 05:26:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-22 05:26:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 05:26:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-22 05:26:20,953 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-22 05:26:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:20,953 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-22 05:26:20,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 05:26:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-22 05:26:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 05:26:20,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:20,954 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] [2020-08-22 05:26:20,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 05:26:20,955 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:20,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-22 05:26:20,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:20,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390061064] [2020-08-22 05:26:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:20,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 05:26:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 05:26:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 05:26:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 05:26:21,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390061064] [2020-08-22 05:26:21,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:21,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 05:26:21,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124764723] [2020-08-22 05:26:21,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 05:26:21,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:21,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 05:26:21,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 05:26:21,513 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-22 05:26:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:21,947 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-22 05:26:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 05:26:21,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-22 05:26:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:21,950 INFO L225 Difference]: With dead ends: 533 [2020-08-22 05:26:21,950 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 05:26:21,951 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 [2020-08-22 05:26:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 05:26:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-22 05:26:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 05:26:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-22 05:26:21,971 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-22 05:26:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:21,971 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-22 05:26:21,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 05:26:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-22 05:26:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 05:26:21,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:21,972 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] [2020-08-22 05:26:21,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 05:26:21,973 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:21,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-22 05:26:21,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:21,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125647759] [2020-08-22 05:26:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 05:26:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 05:26:22,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125647759] [2020-08-22 05:26:22,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:26:22,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 05:26:22,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216468019] [2020-08-22 05:26:22,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:26:22,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:26:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:26:22,152 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-22 05:26:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:22,514 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-22 05:26:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:26:22,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 05:26:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:22,518 INFO L225 Difference]: With dead ends: 271 [2020-08-22 05:26:22,518 INFO L226 Difference]: Without dead ends: 261 [2020-08-22 05:26:22,518 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 [2020-08-22 05:26:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-22 05:26:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-22 05:26:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 05:26:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-22 05:26:22,541 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-22 05:26:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:22,541 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-22 05:26:22,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:26:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-22 05:26:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 05:26:22,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:22,543 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] [2020-08-22 05:26:22,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 05:26:22,544 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-22 05:26:22,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:22,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132621157] [2020-08-22 05:26:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 05:26:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 05:26:22,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132621157] [2020-08-22 05:26:22,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:22,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:26:22,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397743567] [2020-08-22 05:26:22,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:26:22,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:26:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:26:22,815 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-22 05:26:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:23,053 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-22 05:26:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:26:23,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 05:26:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:23,058 INFO L225 Difference]: With dead ends: 285 [2020-08-22 05:26:23,058 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 05:26:23,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:26:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 05:26:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-22 05:26:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 05:26:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-22 05:26:23,102 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-22 05:26:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:23,103 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-22 05:26:23,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:26:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-22 05:26:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 05:26:23,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:23,105 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] [2020-08-22 05:26:23,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 05:26:23,105 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-22 05:26:23,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:23,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764468965] [2020-08-22 05:26:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 05:26:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-22 05:26:23,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764468965] [2020-08-22 05:26:23,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:26:23,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:26:23,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803748361] [2020-08-22 05:26:23,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:26:23,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:23,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:26:23,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:26:23,258 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-22 05:26:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:23,317 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-22 05:26:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:26:23,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-22 05:26:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:23,320 INFO L225 Difference]: With dead ends: 271 [2020-08-22 05:26:23,320 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 05:26:23,321 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 [2020-08-22 05:26:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 05:26:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-22 05:26:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 05:26:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-22 05:26:23,364 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-22 05:26:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:23,366 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-22 05:26:23,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:26:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-22 05:26:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 05:26:23,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:23,368 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] [2020-08-22 05:26:23,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 05:26:23,369 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-22 05:26:23,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:23,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638729793] [2020-08-22 05:26:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 05:26:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 05:26:23,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638729793] [2020-08-22 05:26:23,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:23,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:26:23,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011929204] [2020-08-22 05:26:23,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:26:23,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:23,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:26:23,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:26:23,705 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-22 05:26:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:23,946 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-22 05:26:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:26:23,947 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-22 05:26:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:23,949 INFO L225 Difference]: With dead ends: 284 [2020-08-22 05:26:23,950 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 05:26:23,951 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 [2020-08-22 05:26:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 05:26:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-22 05:26:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 05:26:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-22 05:26:23,979 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-22 05:26:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:23,979 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-22 05:26:23,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:26:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-22 05:26:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 05:26:23,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:23,982 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] [2020-08-22 05:26:23,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 05:26:23,983 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:23,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:23,983 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-22 05:26:23,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:23,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335111199] [2020-08-22 05:26:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 05:26:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 05:26:24,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335111199] [2020-08-22 05:26:24,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:26:24,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 05:26:24,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233482951] [2020-08-22 05:26:24,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:26:24,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:24,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:26:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:26:24,158 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-22 05:26:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:24,288 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-22 05:26:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:26:24,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-22 05:26:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:24,293 INFO L225 Difference]: With dead ends: 303 [2020-08-22 05:26:24,293 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 05:26:24,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:26:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 05:26:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-22 05:26:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 05:26:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-22 05:26:24,325 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-22 05:26:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:24,326 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-22 05:26:24,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:26:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-22 05:26:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 05:26:24,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:24,328 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] [2020-08-22 05:26:24,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 05:26:24,330 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-22 05:26:24,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:24,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356859016] [2020-08-22 05:26:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 05:26:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 05:26:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 05:26:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 05:26:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 05:26:24,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356859016] [2020-08-22 05:26:24,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:24,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 05:26:24,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224208455] [2020-08-22 05:26:24,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 05:26:24,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 05:26:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:26:24,457 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-22 05:26:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:24,556 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-22 05:26:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:26:24,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-22 05:26:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:24,558 INFO L225 Difference]: With dead ends: 409 [2020-08-22 05:26:24,558 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 05:26:24,559 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 [2020-08-22 05:26:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 05:26:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-22 05:26:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 05:26:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 05:26:24,580 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-22 05:26:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:24,580 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 05:26:24,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 05:26:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 05:26:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 05:26:24,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:24,582 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] [2020-08-22 05:26:24,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 05:26:24,582 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-22 05:26:24,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:24,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030508198] [2020-08-22 05:26:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 05:26:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-22 05:26:24,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030508198] [2020-08-22 05:26:24,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:26:24,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 05:26:24,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721524560] [2020-08-22 05:26:24,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:26:24,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:24,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:26:24,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:26:24,758 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-22 05:26:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:24,869 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-22 05:26:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:26:24,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-22 05:26:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:24,871 INFO L225 Difference]: With dead ends: 158 [2020-08-22 05:26:24,871 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 05:26:24,872 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 [2020-08-22 05:26:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 05:26:24,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-22 05:26:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 05:26:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 05:26:24,891 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-22 05:26:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:24,892 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 05:26:24,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:26:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 05:26:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 05:26:24,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:24,893 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] [2020-08-22 05:26:24,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 05:26:24,894 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:24,894 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-22 05:26:24,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:24,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312479060] [2020-08-22 05:26:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:24,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 05:26:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 05:26:25,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312479060] [2020-08-22 05:26:25,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:25,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:26:25,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677535999] [2020-08-22 05:26:25,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:26:25,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:25,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:26:25,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:26:25,050 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-22 05:26:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:25,190 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 05:26:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:26:25,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 05:26:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:25,192 INFO L225 Difference]: With dead ends: 176 [2020-08-22 05:26:25,193 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 05:26:25,193 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 [2020-08-22 05:26:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 05:26:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-22 05:26:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 05:26:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-22 05:26:25,221 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-22 05:26:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:25,222 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-22 05:26:25,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:26:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-22 05:26:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 05:26:25,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:25,223 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] [2020-08-22 05:26:25,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 05:26:25,224 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-22 05:26:25,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:25,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874540763] [2020-08-22 05:26:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 05:26:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 05:26:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 05:26:25,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874540763] [2020-08-22 05:26:25,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:25,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:26:25,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29178001] [2020-08-22 05:26:25,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:26:25,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:26:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:26:25,408 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-22 05:26:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:25,581 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-22 05:26:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:26:25,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 05:26:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:25,583 INFO L225 Difference]: With dead ends: 170 [2020-08-22 05:26:25,584 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 05:26:25,584 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 [2020-08-22 05:26:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 05:26:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-22 05:26:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 05:26:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-22 05:26:25,602 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-22 05:26:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:25,602 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-22 05:26:25,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:26:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-22 05:26:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 05:26:25,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:25,604 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] [2020-08-22 05:26:25,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 05:26:25,604 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-22 05:26:25,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:25,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632835710] [2020-08-22 05:26:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 05:26:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 05:26:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 05:26:25,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632835710] [2020-08-22 05:26:25,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:25,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 05:26:25,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145870318] [2020-08-22 05:26:25,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:26:25,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:26:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:26:25,754 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-22 05:26:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:25,848 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-22 05:26:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:26:25,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-22 05:26:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:25,850 INFO L225 Difference]: With dead ends: 173 [2020-08-22 05:26:25,851 INFO L226 Difference]: Without dead ends: 163 [2020-08-22 05:26:25,851 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 [2020-08-22 05:26:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-22 05:26:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-22 05:26:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 05:26:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-22 05:26:25,870 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-22 05:26:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:25,870 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-22 05:26:25,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:26:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-22 05:26:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 05:26:25,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:26:25,872 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] [2020-08-22 05:26:25,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 05:26:25,872 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:26:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:26:25,873 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-22 05:26:25,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:26:25,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765488668] [2020-08-22 05:26:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:26:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:26:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:25,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:26:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:26,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 05:26:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:26,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 05:26:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 05:26:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:26,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 05:26:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:26:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 05:26:26,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765488668] [2020-08-22 05:26:26,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:26:26,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:26:26,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231044932] [2020-08-22 05:26:26,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:26:26,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:26:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:26:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:26:26,109 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-22 05:26:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:26:26,241 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-22 05:26:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:26:26,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-22 05:26:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:26:26,242 INFO L225 Difference]: With dead ends: 157 [2020-08-22 05:26:26,242 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 05:26:26,243 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 [2020-08-22 05:26:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 05:26:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 05:26:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 05:26:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 05:26:26,243 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-22 05:26:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:26:26,244 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 05:26:26,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:26:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 05:26:26,244 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 05:26:26,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 05:26:26,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 05:26:31,940 WARN L193 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 558 DAG size of output: 226