/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:43:42,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:43:42,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:43:42,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:43:42,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:43:42,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:43:42,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:43:42,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:43:42,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:43:42,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:43:42,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:43:42,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:43:42,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:43:42,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:43:42,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:43:42,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:43:42,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:43:42,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:43:42,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:43:42,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:43:42,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:43:42,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:43:42,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:43:42,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:43:42,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:43:42,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:43:42,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:43:42,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:43:42,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:43:42,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 02:43:42,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 02:43:42,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 02:43:42,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 02:43:42,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 02:43:42,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 02:43:42,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 02:43:42,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 02:43:42,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 02:43:42,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:43:42,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:43:42,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:43:42,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:43:42,286 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:43:42,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:43:42,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:43:42,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:43:42,289 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:43:42,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:43:42,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:43:42,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:43:42,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:43:42,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:43:42,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:43:42,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:43:42,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:43:42,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:43:42,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:43:42,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:43:42,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:43:42,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:43:42,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:43:42,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:43:42,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:43:42,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:43:42,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:43:42,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:43:42,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:43:42,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:43:42,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:43:42,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:43:42,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:43:42,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:43:42,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:43:42,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:43:42,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:43:42,582 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:43:42,582 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:43:42,583 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-19 02:43:42,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3994c58c2/a8001785d0cb465ca7966b6129a2c79b/FLAGc9ed080f5 [2020-08-19 02:43:43,130 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:43:43,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-19 02:43:43,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3994c58c2/a8001785d0cb465ca7966b6129a2c79b/FLAGc9ed080f5 [2020-08-19 02:43:43,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3994c58c2/a8001785d0cb465ca7966b6129a2c79b [2020-08-19 02:43:43,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:43:43,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:43:43,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:43:43,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:43:43,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:43:43,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9ac829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43, skipping insertion in model container [2020-08-19 02:43:43,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:43:43,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:43:43,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:43:43,756 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:43:43,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:43:43,892 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:43:43,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43 WrapperNode [2020-08-19 02:43:43,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:43:43,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:43:43,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:43:43,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:43:43,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (1/1) ... [2020-08-19 02:43:43,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:43:43,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:43:43,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:43:43,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:43:43,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (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 [2020-08-19 02:43:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:43:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:43:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:43:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-19 02:43:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-19 02:43:43,987 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-19 02:43:43,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:43:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:43:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 02:43:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 02:43:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:43:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-19 02:43:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-19 02:43:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-19 02:43:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:43:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:43:43,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:43:44,394 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:43:44,395 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 02:43:44,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:43:44 BoogieIcfgContainer [2020-08-19 02:43:44,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:43:44,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:43:44,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:43:44,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:43:44,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:43:43" (1/3) ... [2020-08-19 02:43:44,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7487b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:43:44, skipping insertion in model container [2020-08-19 02:43:44,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:43:43" (2/3) ... [2020-08-19 02:43:44,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7487b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:43:44, skipping insertion in model container [2020-08-19 02:43:44,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:43:44" (3/3) ... [2020-08-19 02:43:44,407 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-19 02:43:44,416 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:43:44,424 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:43:44,437 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:43:44,456 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:43:44,456 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:43:44,457 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:43:44,457 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:43:44,457 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:43:44,457 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:43:44,457 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:43:44,457 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:43:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-19 02:43:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 02:43:44,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:44,482 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:44,482 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-19 02:43:44,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:44,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56948481] [2020-08-19 02:43:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:44,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:44,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:44,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 02:43:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:44,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 02:43:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:44,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 02:43:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:44,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56948481] [2020-08-19 02:43:44,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:44,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 02:43:44,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907487855] [2020-08-19 02:43:44,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:43:44,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:43:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:43:44,830 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-19 02:43:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:44,960 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-19 02:43:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:43:44,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-19 02:43:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:44,978 INFO L225 Difference]: With dead ends: 136 [2020-08-19 02:43:44,979 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 02:43:44,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:43:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 02:43:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-19 02:43:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 02:43:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-19 02:43:45,036 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-19 02:43:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:45,037 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-19 02:43:45,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:43:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-19 02:43:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 02:43:45,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:45,041 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:45,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:43:45,042 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:45,042 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-19 02:43:45,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:45,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861820606] [2020-08-19 02:43:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:43:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 02:43:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:43:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:45,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861820606] [2020-08-19 02:43:45,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:45,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 02:43:45,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166981972] [2020-08-19 02:43:45,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:43:45,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:45,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:43:45,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:43:45,228 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-19 02:43:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:45,337 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-19 02:43:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:43:45,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-19 02:43:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:45,341 INFO L225 Difference]: With dead ends: 129 [2020-08-19 02:43:45,341 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 02:43:45,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:43:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 02:43:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-19 02:43:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 02:43:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-19 02:43:45,381 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-19 02:43:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:45,381 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-19 02:43:45,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:43:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-19 02:43:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 02:43:45,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:45,384 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:45,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:43:45,385 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-19 02:43:45,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:45,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589343773] [2020-08-19 02:43:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 02:43:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 02:43:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:43:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:45,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589343773] [2020-08-19 02:43:45,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:45,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:43:45,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777262298] [2020-08-19 02:43:45,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:43:45,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:45,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:43:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:43:45,641 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-19 02:43:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:45,769 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-19 02:43:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:43:45,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-19 02:43:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:45,772 INFO L225 Difference]: With dead ends: 145 [2020-08-19 02:43:45,772 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 02:43:45,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:43:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 02:43:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-19 02:43:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 02:43:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-19 02:43:45,787 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-19 02:43:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:45,788 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-19 02:43:45,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:43:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-19 02:43:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 02:43:45,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:45,791 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:45,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:43:45,791 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-19 02:43:45,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:45,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59847801] [2020-08-19 02:43:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 02:43:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 02:43:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:43:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:45,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59847801] [2020-08-19 02:43:45,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:45,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:43:45,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588579566] [2020-08-19 02:43:45,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:43:45,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:45,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:43:45,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:43:45,882 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-19 02:43:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:45,952 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-19 02:43:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:43:45,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-19 02:43:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:45,954 INFO L225 Difference]: With dead ends: 156 [2020-08-19 02:43:45,954 INFO L226 Difference]: Without dead ends: 93 [2020-08-19 02:43:45,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:43:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-19 02:43:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-19 02:43:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 02:43:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-19 02:43:45,973 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-19 02:43:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:45,973 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-19 02:43:45,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:43:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-19 02:43:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 02:43:45,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:45,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:45,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:43:45,979 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-19 02:43:45,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:45,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671486749] [2020-08-19 02:43:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 02:43:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 02:43:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 02:43:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:46,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671486749] [2020-08-19 02:43:46,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:46,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:43:46,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250212200] [2020-08-19 02:43:46,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:43:46,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:43:46,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:43:46,175 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-19 02:43:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:46,273 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-19 02:43:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:43:46,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-19 02:43:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:46,275 INFO L225 Difference]: With dead ends: 166 [2020-08-19 02:43:46,276 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 02:43:46,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:43:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 02:43:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-19 02:43:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 02:43:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-19 02:43:46,293 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-19 02:43:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:46,293 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-19 02:43:46,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:43:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-19 02:43:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 02:43:46,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:46,296 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:46,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:43:46,296 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-19 02:43:46,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:46,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009820521] [2020-08-19 02:43:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 02:43:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 02:43:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 02:43:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:46,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009820521] [2020-08-19 02:43:46,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:46,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:43:46,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104840558] [2020-08-19 02:43:46,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:43:46,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:43:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:43:46,411 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-19 02:43:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:46,514 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-19 02:43:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:43:46,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-19 02:43:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:46,516 INFO L225 Difference]: With dead ends: 176 [2020-08-19 02:43:46,517 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 02:43:46,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:43:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 02:43:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-19 02:43:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 02:43:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-19 02:43:46,531 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-19 02:43:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:46,531 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-19 02:43:46,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:43:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-19 02:43:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 02:43:46,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:46,533 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:46,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:43:46,534 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-19 02:43:46,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:46,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583939002] [2020-08-19 02:43:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 02:43:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:43:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 02:43:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:46,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583939002] [2020-08-19 02:43:46,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:46,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:43:46,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405636090] [2020-08-19 02:43:46,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:43:46,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:43:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:43:46,669 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-19 02:43:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:46,784 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-19 02:43:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:43:46,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-19 02:43:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:46,787 INFO L225 Difference]: With dead ends: 178 [2020-08-19 02:43:46,787 INFO L226 Difference]: Without dead ends: 115 [2020-08-19 02:43:46,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:43:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-19 02:43:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-19 02:43:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 02:43:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-19 02:43:46,801 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-19 02:43:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:46,802 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-19 02:43:46,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:43:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-19 02:43:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 02:43:46,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:46,803 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:46,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:43:46,804 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:46,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-19 02:43:46,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:46,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937640329] [2020-08-19 02:43:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 02:43:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 02:43:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 02:43:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:46,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937640329] [2020-08-19 02:43:46,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:46,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:43:46,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961860055] [2020-08-19 02:43:46,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:43:46,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:43:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:43:46,907 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-19 02:43:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:46,990 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-19 02:43:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:43:46,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-19 02:43:46,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:46,992 INFO L225 Difference]: With dead ends: 193 [2020-08-19 02:43:46,992 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 02:43:46,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:43:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 02:43:47,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-19 02:43:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 02:43:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-19 02:43:47,004 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-19 02:43:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:47,004 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-19 02:43:47,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:43:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-19 02:43:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 02:43:47,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:47,005 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:47,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:43:47,006 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:47,006 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-19 02:43:47,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:47,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494223554] [2020-08-19 02:43:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 02:43:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:43:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 02:43:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:47,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494223554] [2020-08-19 02:43:47,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:47,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:43:47,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707946521] [2020-08-19 02:43:47,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:43:47,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:47,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:43:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:43:47,186 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-19 02:43:47,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:47,336 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-19 02:43:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:43:47,337 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-19 02:43:47,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:47,338 INFO L225 Difference]: With dead ends: 190 [2020-08-19 02:43:47,338 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 02:43:47,339 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 [2020-08-19 02:43:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 02:43:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-19 02:43:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 02:43:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-19 02:43:47,350 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-19 02:43:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:47,351 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-19 02:43:47,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:43:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-19 02:43:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 02:43:47,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:47,352 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:47,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:43:47,353 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-19 02:43:47,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:47,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296289150] [2020-08-19 02:43:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 02:43:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 02:43:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 02:43:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:47,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296289150] [2020-08-19 02:43:47,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:47,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:43:47,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129169373] [2020-08-19 02:43:47,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:43:47,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:47,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:43:47,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:43:47,467 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-19 02:43:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:47,559 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-19 02:43:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:43:47,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-19 02:43:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:47,561 INFO L225 Difference]: With dead ends: 210 [2020-08-19 02:43:47,561 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 02:43:47,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:43:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 02:43:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-19 02:43:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 02:43:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-19 02:43:47,572 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-19 02:43:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:47,572 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-19 02:43:47,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:43:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-19 02:43:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 02:43:47,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:47,574 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:47,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:43:47,574 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-19 02:43:47,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:47,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095196660] [2020-08-19 02:43:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 02:43:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 02:43:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 02:43:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:47,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095196660] [2020-08-19 02:43:47,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:47,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:43:47,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988158469] [2020-08-19 02:43:47,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:43:47,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:43:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:43:47,727 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-19 02:43:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:47,871 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-19 02:43:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:43:47,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-19 02:43:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:47,873 INFO L225 Difference]: With dead ends: 202 [2020-08-19 02:43:47,873 INFO L226 Difference]: Without dead ends: 133 [2020-08-19 02:43:47,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:43:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-19 02:43:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-19 02:43:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-19 02:43:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-19 02:43:47,883 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-19 02:43:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:47,884 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-19 02:43:47,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:43:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-19 02:43:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 02:43:47,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:47,885 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:47,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:43:47,885 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-19 02:43:47,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:47,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126722178] [2020-08-19 02:43:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:47,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:43:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 02:43:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 02:43:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:48,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126722178] [2020-08-19 02:43:48,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:48,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:43:48,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9804975] [2020-08-19 02:43:48,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:43:48,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:43:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:43:48,018 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-19 02:43:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:48,127 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-19 02:43:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:43:48,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 02:43:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:48,129 INFO L225 Difference]: With dead ends: 227 [2020-08-19 02:43:48,129 INFO L226 Difference]: Without dead ends: 152 [2020-08-19 02:43:48,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:43:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-19 02:43:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-19 02:43:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 02:43:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-19 02:43:48,141 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-19 02:43:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:48,142 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-19 02:43:48,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:43:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-19 02:43:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 02:43:48,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:48,143 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:48,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:43:48,143 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-19 02:43:48,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:48,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780302008] [2020-08-19 02:43:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:43:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 02:43:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 02:43:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:48,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780302008] [2020-08-19 02:43:48,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:48,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:43:48,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921638444] [2020-08-19 02:43:48,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:43:48,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:48,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:43:48,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:43:48,321 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-19 02:43:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:48,518 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-19 02:43:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:43:48,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-19 02:43:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:48,521 INFO L225 Difference]: With dead ends: 214 [2020-08-19 02:43:48,521 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 02:43:48,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:43:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 02:43:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-19 02:43:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 02:43:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-19 02:43:48,535 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-19 02:43:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:48,535 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-19 02:43:48,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:43:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-19 02:43:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 02:43:48,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:48,537 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:48,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:43:48,537 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:48,538 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-19 02:43:48,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:48,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199359610] [2020-08-19 02:43:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 02:43:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 02:43:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 02:43:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:48,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199359610] [2020-08-19 02:43:48,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:48,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:43:48,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780484543] [2020-08-19 02:43:48,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:43:48,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:48,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:43:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:43:48,666 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-19 02:43:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:48,819 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-19 02:43:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:43:48,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-19 02:43:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:48,821 INFO L225 Difference]: With dead ends: 244 [2020-08-19 02:43:48,821 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 02:43:48,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:43:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 02:43:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-19 02:43:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 02:43:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-19 02:43:48,832 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-19 02:43:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:48,832 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-19 02:43:48,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:43:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-19 02:43:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 02:43:48,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:48,834 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:48,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:43:48,834 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:48,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-19 02:43:48,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:48,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972754281] [2020-08-19 02:43:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 02:43:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 02:43:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 02:43:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:49,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972754281] [2020-08-19 02:43:49,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:49,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:43:49,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316549798] [2020-08-19 02:43:49,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:43:49,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:49,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:43:49,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:43:49,020 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-19 02:43:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:49,234 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-19 02:43:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:43:49,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-19 02:43:49,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:49,236 INFO L225 Difference]: With dead ends: 226 [2020-08-19 02:43:49,236 INFO L226 Difference]: Without dead ends: 151 [2020-08-19 02:43:49,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:43:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-19 02:43:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-19 02:43:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 02:43:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-19 02:43:49,253 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-19 02:43:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:49,253 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-19 02:43:49,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:43:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-19 02:43:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 02:43:49,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:49,255 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:49,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:43:49,255 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:49,256 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-19 02:43:49,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:49,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796724272] [2020-08-19 02:43:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 02:43:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-19 02:43:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 02:43:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:49,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796724272] [2020-08-19 02:43:49,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:49,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:43:49,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977087409] [2020-08-19 02:43:49,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:43:49,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:49,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:43:49,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:43:49,427 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-19 02:43:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:49,544 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-19 02:43:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:43:49,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-19 02:43:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:49,546 INFO L225 Difference]: With dead ends: 261 [2020-08-19 02:43:49,546 INFO L226 Difference]: Without dead ends: 180 [2020-08-19 02:43:49,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:43:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-19 02:43:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-19 02:43:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-19 02:43:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-19 02:43:49,559 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-19 02:43:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:49,559 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-19 02:43:49,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:43:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-19 02:43:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 02:43:49,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:49,560 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:49,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 02:43:49,561 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-19 02:43:49,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:49,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084645272] [2020-08-19 02:43:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 02:43:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 02:43:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 02:43:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:49,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084645272] [2020-08-19 02:43:49,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:49,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:43:49,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281682088] [2020-08-19 02:43:49,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:43:49,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:43:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:43:49,799 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-19 02:43:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:50,046 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-19 02:43:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 02:43:50,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-19 02:43:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:50,049 INFO L225 Difference]: With dead ends: 238 [2020-08-19 02:43:50,049 INFO L226 Difference]: Without dead ends: 160 [2020-08-19 02:43:50,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:43:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-19 02:43:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-19 02:43:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 02:43:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-19 02:43:50,060 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-19 02:43:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:50,061 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-19 02:43:50,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:43:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-19 02:43:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 02:43:50,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:50,062 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:50,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 02:43:50,063 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-19 02:43:50,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:50,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655046628] [2020-08-19 02:43:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 02:43:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 02:43:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 02:43:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:50,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655046628] [2020-08-19 02:43:50,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:50,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:43:50,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310239623] [2020-08-19 02:43:50,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:43:50,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:50,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:43:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:43:50,245 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-19 02:43:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:50,426 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-19 02:43:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 02:43:50,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-19 02:43:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:50,429 INFO L225 Difference]: With dead ends: 278 [2020-08-19 02:43:50,429 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 02:43:50,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:43:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 02:43:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-19 02:43:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-19 02:43:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-19 02:43:50,447 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-19 02:43:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:50,448 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-19 02:43:50,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:43:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-19 02:43:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 02:43:50,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:50,450 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:50,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 02:43:50,451 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:50,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-19 02:43:50,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:50,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502648068] [2020-08-19 02:43:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 02:43:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 02:43:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 02:43:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:50,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502648068] [2020-08-19 02:43:50,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:50,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:43:50,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705893928] [2020-08-19 02:43:50,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:43:50,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:43:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:43:50,762 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-19 02:43:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:51,011 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-19 02:43:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:43:51,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-19 02:43:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:51,013 INFO L225 Difference]: With dead ends: 250 [2020-08-19 02:43:51,013 INFO L226 Difference]: Without dead ends: 169 [2020-08-19 02:43:51,014 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 [2020-08-19 02:43:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-19 02:43:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-19 02:43:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-19 02:43:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-19 02:43:51,025 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-19 02:43:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:51,025 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-19 02:43:51,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:43:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-19 02:43:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 02:43:51,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:51,026 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:51,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 02:43:51,027 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-19 02:43:51,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:51,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617290128] [2020-08-19 02:43:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 02:43:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-19 02:43:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 02:43:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:51,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617290128] [2020-08-19 02:43:51,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:51,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:43:51,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417513518] [2020-08-19 02:43:51,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:43:51,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:51,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:43:51,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:43:51,203 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-19 02:43:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:51,329 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-19 02:43:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:43:51,330 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-19 02:43:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:51,332 INFO L225 Difference]: With dead ends: 295 [2020-08-19 02:43:51,332 INFO L226 Difference]: Without dead ends: 208 [2020-08-19 02:43:51,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:43:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-19 02:43:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-19 02:43:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 02:43:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-19 02:43:51,344 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-19 02:43:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:51,344 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-19 02:43:51,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:43:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-19 02:43:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 02:43:51,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:51,346 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:51,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 02:43:51,346 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:51,347 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-19 02:43:51,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:51,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485753514] [2020-08-19 02:43:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 02:43:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 02:43:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 02:43:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:51,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485753514] [2020-08-19 02:43:51,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:51,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 02:43:51,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594415928] [2020-08-19 02:43:51,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 02:43:51,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 02:43:51,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:43:51,613 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-19 02:43:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:51,938 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-19 02:43:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:43:51,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-19 02:43:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:51,941 INFO L225 Difference]: With dead ends: 262 [2020-08-19 02:43:51,941 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 02:43:51,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:43:51,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 02:43:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-19 02:43:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-19 02:43:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-19 02:43:51,954 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-19 02:43:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:51,954 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-19 02:43:51,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 02:43:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-19 02:43:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 02:43:51,955 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:51,956 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:51,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 02:43:51,957 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:51,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-19 02:43:51,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:51,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657233553] [2020-08-19 02:43:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:51,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 02:43:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 02:43:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:43:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:52,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657233553] [2020-08-19 02:43:52,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:52,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 02:43:52,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739540551] [2020-08-19 02:43:52,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 02:43:52,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 02:43:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:43:52,141 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-19 02:43:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:52,329 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-19 02:43:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:43:52,331 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-19 02:43:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:52,334 INFO L225 Difference]: With dead ends: 312 [2020-08-19 02:43:52,334 INFO L226 Difference]: Without dead ends: 222 [2020-08-19 02:43:52,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:43:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-19 02:43:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-19 02:43:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 02:43:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-19 02:43:52,352 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-19 02:43:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:52,352 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-19 02:43:52,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 02:43:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-19 02:43:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 02:43:52,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:52,354 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:52,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 02:43:52,354 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:52,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:52,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-19 02:43:52,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:52,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651544458] [2020-08-19 02:43:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 02:43:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 02:43:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 02:43:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:52,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651544458] [2020-08-19 02:43:52,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:52,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 02:43:52,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595392738] [2020-08-19 02:43:52,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 02:43:52,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 02:43:52,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:43:52,705 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-19 02:43:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:53,050 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-19 02:43:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 02:43:53,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-19 02:43:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:53,052 INFO L225 Difference]: With dead ends: 274 [2020-08-19 02:43:53,052 INFO L226 Difference]: Without dead ends: 187 [2020-08-19 02:43:53,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:43:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-19 02:43:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-19 02:43:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-19 02:43:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-19 02:43:53,062 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-19 02:43:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:53,062 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-19 02:43:53,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 02:43:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-19 02:43:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-19 02:43:53,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:53,064 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:53,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 02:43:53,065 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-19 02:43:53,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:53,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485368826] [2020-08-19 02:43:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 02:43:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 02:43:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 02:43:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:53,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485368826] [2020-08-19 02:43:53,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:53,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 02:43:53,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617414634] [2020-08-19 02:43:53,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 02:43:53,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:53,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 02:43:53,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:43:53,269 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-19 02:43:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:53,419 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-19 02:43:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 02:43:53,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-19 02:43:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:53,422 INFO L225 Difference]: With dead ends: 329 [2020-08-19 02:43:53,422 INFO L226 Difference]: Without dead ends: 236 [2020-08-19 02:43:53,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:43:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-19 02:43:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-19 02:43:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-19 02:43:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-19 02:43:53,435 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-19 02:43:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:53,436 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-19 02:43:53,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 02:43:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-19 02:43:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 02:43:53,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:53,437 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:53,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 02:43:53,438 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:53,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-19 02:43:53,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:53,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665010810] [2020-08-19 02:43:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 02:43:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 02:43:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 02:43:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:53,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665010810] [2020-08-19 02:43:53,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:53,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 02:43:53,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440314845] [2020-08-19 02:43:53,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 02:43:53,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:53,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 02:43:53,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:43:53,778 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-19 02:43:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:54,198 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-19 02:43:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 02:43:54,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-19 02:43:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:54,200 INFO L225 Difference]: With dead ends: 286 [2020-08-19 02:43:54,200 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 02:43:54,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:43:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 02:43:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-19 02:43:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-19 02:43:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-19 02:43:54,213 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-19 02:43:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:54,213 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-19 02:43:54,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 02:43:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-19 02:43:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 02:43:54,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:54,215 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:54,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 02:43:54,215 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:54,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-19 02:43:54,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:54,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080307514] [2020-08-19 02:43:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 02:43:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 02:43:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 02:43:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:54,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080307514] [2020-08-19 02:43:54,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:54,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 02:43:54,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108546121] [2020-08-19 02:43:54,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 02:43:54,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:54,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 02:43:54,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:43:54,440 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-19 02:43:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:54,632 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-19 02:43:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 02:43:54,632 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-19 02:43:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:54,634 INFO L225 Difference]: With dead ends: 346 [2020-08-19 02:43:54,634 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 02:43:54,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:43:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 02:43:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-19 02:43:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 02:43:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-19 02:43:54,647 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-19 02:43:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:54,647 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-19 02:43:54,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 02:43:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-19 02:43:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 02:43:54,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:54,649 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:54,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 02:43:54,649 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-19 02:43:54,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:54,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474077368] [2020-08-19 02:43:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 02:43:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:43:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 02:43:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 02:43:54,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474077368] [2020-08-19 02:43:54,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:43:54,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:43:54,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957170899] [2020-08-19 02:43:54,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:43:54,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:43:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:43:54,703 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-19 02:43:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:54,716 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-19 02:43:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:43:54,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-19 02:43:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:54,718 INFO L225 Difference]: With dead ends: 160 [2020-08-19 02:43:54,718 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 02:43:54,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:43:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 02:43:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 02:43:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 02:43:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-19 02:43:54,728 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-19 02:43:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:54,728 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-19 02:43:54,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:43:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-19 02:43:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 02:43:54,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:54,730 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:54,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 02:43:54,730 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-19 02:43:54,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:54,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828521286] [2020-08-19 02:43:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 02:43:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:43:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 02:43:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 02:43:54,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828521286] [2020-08-19 02:43:54,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:43:54,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:43:54,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144719045] [2020-08-19 02:43:54,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:43:54,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:43:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:43:54,799 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-19 02:43:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:54,831 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-19 02:43:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:43:54,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-19 02:43:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:54,833 INFO L225 Difference]: With dead ends: 161 [2020-08-19 02:43:54,833 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 02:43:54,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:43:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 02:43:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 02:43:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 02:43:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-19 02:43:54,844 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-19 02:43:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:54,844 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-19 02:43:54,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:43:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-19 02:43:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 02:43:54,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:54,845 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:54,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 02:43:54,846 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:54,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-19 02:43:54,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:54,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172350089] [2020-08-19 02:43:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:54,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:55,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 02:43:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:55,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:43:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:55,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 02:43:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:55,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172350089] [2020-08-19 02:43:55,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:55,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 02:43:55,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563431744] [2020-08-19 02:43:55,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 02:43:55,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 02:43:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:43:55,255 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-19 02:43:55,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:55,759 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-19 02:43:55,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:43:55,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-19 02:43:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:55,762 INFO L225 Difference]: With dead ends: 298 [2020-08-19 02:43:55,762 INFO L226 Difference]: Without dead ends: 205 [2020-08-19 02:43:55,764 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 [2020-08-19 02:43:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-19 02:43:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-19 02:43:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-19 02:43:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-19 02:43:55,777 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-19 02:43:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:55,777 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-19 02:43:55,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 02:43:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-19 02:43:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 02:43:55,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:55,779 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:55,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 02:43:55,779 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-19 02:43:55,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:55,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059386007] [2020-08-19 02:43:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:55,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:55,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:55,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 02:43:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-19 02:43:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 02:43:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:56,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059386007] [2020-08-19 02:43:56,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:56,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 02:43:56,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13190592] [2020-08-19 02:43:56,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 02:43:56,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 02:43:56,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:43:56,059 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-19 02:43:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:56,284 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-19 02:43:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:43:56,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-19 02:43:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:56,286 INFO L225 Difference]: With dead ends: 363 [2020-08-19 02:43:56,287 INFO L226 Difference]: Without dead ends: 264 [2020-08-19 02:43:56,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:43:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-19 02:43:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-19 02:43:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-19 02:43:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-19 02:43:56,304 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-19 02:43:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:56,305 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-19 02:43:56,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 02:43:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-19 02:43:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-19 02:43:56,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:56,306 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:56,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 02:43:56,306 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-19 02:43:56,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:56,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076711479] [2020-08-19 02:43:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 02:43:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 02:43:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 02:43:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:56,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076711479] [2020-08-19 02:43:56,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:56,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 02:43:56,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167332712] [2020-08-19 02:43:56,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 02:43:56,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 02:43:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:43:56,707 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-19 02:43:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:57,261 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-19 02:43:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 02:43:57,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-19 02:43:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:57,265 INFO L225 Difference]: With dead ends: 310 [2020-08-19 02:43:57,265 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 02:43:57,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:43:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 02:43:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-19 02:43:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-19 02:43:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-19 02:43:57,279 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-19 02:43:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:57,279 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-19 02:43:57,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 02:43:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-19 02:43:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-19 02:43:57,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:57,281 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:57,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 02:43:57,282 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:57,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-19 02:43:57,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:57,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014173751] [2020-08-19 02:43:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 02:43:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 02:43:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 02:43:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:57,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014173751] [2020-08-19 02:43:57,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:57,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 02:43:57,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485647201] [2020-08-19 02:43:57,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 02:43:57,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 02:43:57,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:43:57,655 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-19 02:43:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:57,827 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-19 02:43:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 02:43:57,828 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-19 02:43:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:57,830 INFO L225 Difference]: With dead ends: 380 [2020-08-19 02:43:57,830 INFO L226 Difference]: Without dead ends: 278 [2020-08-19 02:43:57,832 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 [2020-08-19 02:43:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-19 02:43:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-19 02:43:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-19 02:43:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-19 02:43:57,852 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-19 02:43:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:57,852 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-19 02:43:57,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 02:43:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-19 02:43:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 02:43:57,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:57,854 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:57,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 02:43:57,854 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:57,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-19 02:43:57,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:57,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663071351] [2020-08-19 02:43:57,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:57,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:58,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 02:43:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:58,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 02:43:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:58,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 02:43:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:58,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663071351] [2020-08-19 02:43:58,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:58,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 02:43:58,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377841932] [2020-08-19 02:43:58,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 02:43:58,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 02:43:58,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:43:58,275 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-19 02:43:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:58,945 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-19 02:43:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 02:43:58,945 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 02:43:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:58,947 INFO L225 Difference]: With dead ends: 322 [2020-08-19 02:43:58,947 INFO L226 Difference]: Without dead ends: 223 [2020-08-19 02:43:58,950 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 [2020-08-19 02:43:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-19 02:43:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-19 02:43:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-19 02:43:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-19 02:43:58,964 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-19 02:43:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:58,964 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-19 02:43:58,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 02:43:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-19 02:43:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 02:43:58,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:58,967 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:58,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 02:43:58,967 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:58,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-19 02:43:58,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:58,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528430828] [2020-08-19 02:43:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:58,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:58,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:43:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 02:43:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 02:43:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:43:59,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528430828] [2020-08-19 02:43:59,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:43:59,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 02:43:59,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530675738] [2020-08-19 02:43:59,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 02:43:59,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:43:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 02:43:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:43:59,288 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-19 02:43:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:43:59,517 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-19 02:43:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 02:43:59,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-19 02:43:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:43:59,521 INFO L225 Difference]: With dead ends: 397 [2020-08-19 02:43:59,521 INFO L226 Difference]: Without dead ends: 292 [2020-08-19 02:43:59,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:43:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-19 02:43:59,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-19 02:43:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-19 02:43:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-19 02:43:59,536 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-19 02:43:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:43:59,537 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-19 02:43:59,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 02:43:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-19 02:43:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 02:43:59,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:43:59,538 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:43:59,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 02:43:59,539 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:43:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:43:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-19 02:43:59,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:43:59,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756058501] [2020-08-19 02:43:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:43:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:43:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:43:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:43:59,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:43:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:00,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 02:44:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:00,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 02:44:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:00,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 02:44:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:00,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756058501] [2020-08-19 02:44:00,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:00,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 02:44:00,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296593524] [2020-08-19 02:44:00,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 02:44:00,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:00,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 02:44:00,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:44:00,105 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-19 02:44:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:00,813 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-19 02:44:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 02:44:00,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-19 02:44:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:00,815 INFO L225 Difference]: With dead ends: 334 [2020-08-19 02:44:00,815 INFO L226 Difference]: Without dead ends: 232 [2020-08-19 02:44:00,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:44:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-19 02:44:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-19 02:44:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 02:44:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-19 02:44:00,835 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-19 02:44:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:00,836 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-19 02:44:00,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 02:44:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-19 02:44:00,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-19 02:44:00,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:00,838 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:00,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 02:44:00,838 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-19 02:44:00,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:00,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380905968] [2020-08-19 02:44:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:00,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:00,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:00,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 02:44:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 02:44:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 02:44:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:01,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380905968] [2020-08-19 02:44:01,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:01,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 02:44:01,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808134784] [2020-08-19 02:44:01,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 02:44:01,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:01,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 02:44:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:44:01,161 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-19 02:44:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:01,462 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-19 02:44:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 02:44:01,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-19 02:44:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:01,465 INFO L225 Difference]: With dead ends: 414 [2020-08-19 02:44:01,465 INFO L226 Difference]: Without dead ends: 306 [2020-08-19 02:44:01,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:44:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-19 02:44:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-19 02:44:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-19 02:44:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-19 02:44:01,487 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-19 02:44:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:01,487 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-19 02:44:01,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 02:44:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-19 02:44:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 02:44:01,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:01,489 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:01,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 02:44:01,489 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-19 02:44:01,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:01,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842366310] [2020-08-19 02:44:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 02:44:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 02:44:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 02:44:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:01,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842366310] [2020-08-19 02:44:01,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:01,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 02:44:01,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436502651] [2020-08-19 02:44:01,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 02:44:01,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 02:44:01,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:44:01,999 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-19 02:44:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:02,729 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-19 02:44:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 02:44:02,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-19 02:44:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:02,732 INFO L225 Difference]: With dead ends: 346 [2020-08-19 02:44:02,732 INFO L226 Difference]: Without dead ends: 241 [2020-08-19 02:44:02,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:44:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-19 02:44:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-19 02:44:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-19 02:44:02,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-19 02:44:02,750 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-19 02:44:02,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:02,751 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-19 02:44:02,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 02:44:02,751 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-19 02:44:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-19 02:44:02,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:02,755 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:02,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 02:44:02,756 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-19 02:44:02,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:02,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903857000] [2020-08-19 02:44:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:02,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:02,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:02,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 02:44:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 02:44:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 02:44:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:03,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903857000] [2020-08-19 02:44:03,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:03,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 02:44:03,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613357823] [2020-08-19 02:44:03,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 02:44:03,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 02:44:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:44:03,106 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-19 02:44:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:03,386 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-19 02:44:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 02:44:03,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-19 02:44:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:03,389 INFO L225 Difference]: With dead ends: 431 [2020-08-19 02:44:03,389 INFO L226 Difference]: Without dead ends: 320 [2020-08-19 02:44:03,390 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 [2020-08-19 02:44:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-19 02:44:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-19 02:44:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-19 02:44:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-19 02:44:03,404 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-19 02:44:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:03,405 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-19 02:44:03,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 02:44:03,405 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-19 02:44:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-19 02:44:03,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:03,407 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:03,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 02:44:03,407 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-19 02:44:03,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:03,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054863330] [2020-08-19 02:44:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 02:44:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 02:44:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 02:44:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:03,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054863330] [2020-08-19 02:44:03,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:03,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 02:44:03,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673871985] [2020-08-19 02:44:03,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 02:44:03,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 02:44:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:44:03,936 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-19 02:44:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:04,701 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-19 02:44:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 02:44:04,707 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-19 02:44:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:04,709 INFO L225 Difference]: With dead ends: 358 [2020-08-19 02:44:04,709 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 02:44:04,710 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 [2020-08-19 02:44:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 02:44:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-19 02:44:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-19 02:44:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-19 02:44:04,726 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-19 02:44:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:04,726 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-19 02:44:04,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 02:44:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-19 02:44:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-19 02:44:04,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:04,728 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:04,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 02:44:04,728 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-19 02:44:04,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:04,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256927401] [2020-08-19 02:44:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:04,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:04,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:04,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 02:44:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 02:44:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:05,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256927401] [2020-08-19 02:44:05,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:05,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 02:44:05,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114398475] [2020-08-19 02:44:05,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 02:44:05,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 02:44:05,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:44:05,121 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-19 02:44:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:05,361 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-19 02:44:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 02:44:05,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-19 02:44:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:05,364 INFO L225 Difference]: With dead ends: 448 [2020-08-19 02:44:05,364 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 02:44:05,365 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 [2020-08-19 02:44:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 02:44:05,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-19 02:44:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 02:44:05,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-19 02:44:05,389 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-19 02:44:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:05,389 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-19 02:44:05,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 02:44:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-19 02:44:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 02:44:05,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:05,391 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:05,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 02:44:05,392 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-19 02:44:05,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:05,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976299139] [2020-08-19 02:44:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 02:44:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 02:44:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 02:44:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976299139] [2020-08-19 02:44:05,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:05,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 02:44:05,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539583576] [2020-08-19 02:44:05,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 02:44:05,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 02:44:05,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-19 02:44:05,974 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-19 02:44:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:06,784 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-19 02:44:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 02:44:06,789 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-19 02:44:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:06,791 INFO L225 Difference]: With dead ends: 370 [2020-08-19 02:44:06,791 INFO L226 Difference]: Without dead ends: 259 [2020-08-19 02:44:06,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:44:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-19 02:44:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-19 02:44:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-19 02:44:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-19 02:44:06,812 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-19 02:44:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:06,812 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-19 02:44:06,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 02:44:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-19 02:44:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 02:44:06,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:06,814 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:06,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 02:44:06,814 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-19 02:44:06,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:06,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501204950] [2020-08-19 02:44:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:06,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:06,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:06,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:07,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 02:44:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:07,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 02:44:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:07,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-19 02:44:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:07,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501204950] [2020-08-19 02:44:07,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:07,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 02:44:07,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478326959] [2020-08-19 02:44:07,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 02:44:07,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 02:44:07,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-19 02:44:07,258 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-19 02:44:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:07,574 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-19 02:44:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 02:44:07,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-19 02:44:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:07,578 INFO L225 Difference]: With dead ends: 465 [2020-08-19 02:44:07,578 INFO L226 Difference]: Without dead ends: 348 [2020-08-19 02:44:07,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:44:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-19 02:44:07,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-19 02:44:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-19 02:44:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-19 02:44:07,597 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-19 02:44:07,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:07,597 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-19 02:44:07,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 02:44:07,598 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-19 02:44:07,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-19 02:44:07,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:07,600 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:07,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 02:44:07,600 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-19 02:44:07,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:07,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029543528] [2020-08-19 02:44:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:07,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:07,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:07,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:08,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 02:44:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:08,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 02:44:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:08,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 02:44:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:08,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029543528] [2020-08-19 02:44:08,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:08,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 02:44:08,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918141181] [2020-08-19 02:44:08,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 02:44:08,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:08,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 02:44:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:44:08,223 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-19 02:44:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:09,302 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-19 02:44:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 02:44:09,303 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-19 02:44:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:09,305 INFO L225 Difference]: With dead ends: 382 [2020-08-19 02:44:09,305 INFO L226 Difference]: Without dead ends: 268 [2020-08-19 02:44:09,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:44:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-19 02:44:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-19 02:44:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-19 02:44:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-19 02:44:09,321 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-19 02:44:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:09,322 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-19 02:44:09,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 02:44:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-19 02:44:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-19 02:44:09,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:09,323 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:09,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-19 02:44:09,324 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:09,324 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-19 02:44:09,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:09,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907436532] [2020-08-19 02:44:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:09,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:09,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:09,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:09,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 02:44:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:09,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 02:44:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:09,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 02:44:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:09,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907436532] [2020-08-19 02:44:09,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:09,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 02:44:09,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74678471] [2020-08-19 02:44:09,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 02:44:09,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 02:44:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:44:09,763 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-19 02:44:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:10,191 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-19 02:44:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 02:44:10,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-19 02:44:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:10,194 INFO L225 Difference]: With dead ends: 482 [2020-08-19 02:44:10,194 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 02:44:10,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:44:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 02:44:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-19 02:44:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-19 02:44:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-19 02:44:10,212 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-19 02:44:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:10,213 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-19 02:44:10,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 02:44:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-19 02:44:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 02:44:10,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:10,214 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:10,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-19 02:44:10,215 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-19 02:44:10,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:10,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725313321] [2020-08-19 02:44:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:10,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:10,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:10,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 02:44:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:10,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 02:44:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:10,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 02:44:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:10,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725313321] [2020-08-19 02:44:10,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:10,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 02:44:10,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111714945] [2020-08-19 02:44:10,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 02:44:10,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:10,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 02:44:10,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:44:10,847 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-19 02:44:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:11,965 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-19 02:44:11,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 02:44:11,966 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-19 02:44:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:11,967 INFO L225 Difference]: With dead ends: 394 [2020-08-19 02:44:11,967 INFO L226 Difference]: Without dead ends: 277 [2020-08-19 02:44:11,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:44:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-19 02:44:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-19 02:44:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-19 02:44:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-19 02:44:11,985 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-19 02:44:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:11,985 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-19 02:44:11,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 02:44:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-19 02:44:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-19 02:44:11,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:11,987 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:11,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-19 02:44:11,987 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-19 02:44:11,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:11,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398477989] [2020-08-19 02:44:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 02:44:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 02:44:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-19 02:44:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:12,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398477989] [2020-08-19 02:44:12,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:12,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 02:44:12,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301622190] [2020-08-19 02:44:12,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 02:44:12,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:12,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 02:44:12,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:44:12,486 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-19 02:44:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:12,770 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-19 02:44:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 02:44:12,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-19 02:44:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:12,773 INFO L225 Difference]: With dead ends: 499 [2020-08-19 02:44:12,773 INFO L226 Difference]: Without dead ends: 376 [2020-08-19 02:44:12,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:44:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-19 02:44:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-19 02:44:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-19 02:44:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-19 02:44:12,793 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-19 02:44:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:12,793 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-19 02:44:12,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 02:44:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-19 02:44:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-19 02:44:12,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:12,795 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:12,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-19 02:44:12,795 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-19 02:44:12,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:12,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200969026] [2020-08-19 02:44:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:12,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:13,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 02:44:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:13,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-19 02:44:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:13,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 02:44:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:13,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200969026] [2020-08-19 02:44:13,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:13,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 02:44:13,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466960776] [2020-08-19 02:44:13,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 02:44:13,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 02:44:13,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:44:13,524 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-19 02:44:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:14,738 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-19 02:44:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 02:44:14,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-19 02:44:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:14,740 INFO L225 Difference]: With dead ends: 406 [2020-08-19 02:44:14,740 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 02:44:14,741 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 [2020-08-19 02:44:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 02:44:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-19 02:44:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-19 02:44:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-19 02:44:14,758 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-19 02:44:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:14,759 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-19 02:44:14,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 02:44:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-19 02:44:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-19 02:44:14,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:14,760 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:14,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-19 02:44:14,760 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:14,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-19 02:44:14,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:14,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856998602] [2020-08-19 02:44:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:14,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:14,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:14,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 02:44:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:15,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 02:44:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:15,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 02:44:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:15,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856998602] [2020-08-19 02:44:15,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:15,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 02:44:15,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279575017] [2020-08-19 02:44:15,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 02:44:15,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 02:44:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:44:15,260 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-19 02:44:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:15,555 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-19 02:44:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 02:44:15,556 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-19 02:44:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:15,558 INFO L225 Difference]: With dead ends: 516 [2020-08-19 02:44:15,558 INFO L226 Difference]: Without dead ends: 390 [2020-08-19 02:44:15,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:44:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-19 02:44:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-19 02:44:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-19 02:44:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-19 02:44:15,578 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-19 02:44:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:15,578 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-19 02:44:15,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 02:44:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-19 02:44:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 02:44:15,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:15,580 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:15,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-19 02:44:15,580 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-19 02:44:15,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:15,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355701296] [2020-08-19 02:44:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:15,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:15,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:15,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 02:44:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:16,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 02:44:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:16,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 02:44:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:16,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355701296] [2020-08-19 02:44:16,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:16,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 02:44:16,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843620440] [2020-08-19 02:44:16,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 02:44:16,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 02:44:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:44:16,312 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-19 02:44:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:17,639 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-19 02:44:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 02:44:17,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-19 02:44:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:17,641 INFO L225 Difference]: With dead ends: 418 [2020-08-19 02:44:17,641 INFO L226 Difference]: Without dead ends: 295 [2020-08-19 02:44:17,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:44:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-19 02:44:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-19 02:44:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-19 02:44:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-19 02:44:17,666 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-19 02:44:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:17,666 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-19 02:44:17,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 02:44:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-19 02:44:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-19 02:44:17,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:17,668 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:17,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-19 02:44:17,668 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:17,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-19 02:44:17,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:17,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899921552] [2020-08-19 02:44:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:17,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:17,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:17,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 02:44:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 02:44:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-19 02:44:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 02:44:18,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899921552] [2020-08-19 02:44:18,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:18,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 02:44:18,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215141688] [2020-08-19 02:44:18,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 02:44:18,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 02:44:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:44:18,239 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-19 02:44:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:18,616 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-19 02:44:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 02:44:18,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-19 02:44:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:18,619 INFO L225 Difference]: With dead ends: 533 [2020-08-19 02:44:18,619 INFO L226 Difference]: Without dead ends: 404 [2020-08-19 02:44:18,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:44:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-19 02:44:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-19 02:44:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-19 02:44:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-19 02:44:18,640 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-19 02:44:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:18,641 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-19 02:44:18,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 02:44:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-19 02:44:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 02:44:18,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:18,642 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:18,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-19 02:44:18,643 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-19 02:44:18,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:18,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463766688] [2020-08-19 02:44:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 02:44:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 02:44:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 02:44:18,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463766688] [2020-08-19 02:44:18,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:44:18,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 02:44:18,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450869492] [2020-08-19 02:44:18,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:44:18,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:44:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:44:18,846 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-19 02:44:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:19,094 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-19 02:44:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:44:19,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 02:44:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:19,097 INFO L225 Difference]: With dead ends: 271 [2020-08-19 02:44:19,097 INFO L226 Difference]: Without dead ends: 261 [2020-08-19 02:44:19,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:44:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-19 02:44:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-19 02:44:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-19 02:44:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-19 02:44:19,121 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-19 02:44:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:19,121 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-19 02:44:19,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:44:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-19 02:44:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 02:44:19,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:19,124 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:19,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-19 02:44:19,124 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-19 02:44:19,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:19,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236049935] [2020-08-19 02:44:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 02:44:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 02:44:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 02:44:19,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236049935] [2020-08-19 02:44:19,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:19,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:44:19,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924089837] [2020-08-19 02:44:19,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:44:19,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:44:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:44:19,397 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-19 02:44:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:19,593 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-19 02:44:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:44:19,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 02:44:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:19,597 INFO L225 Difference]: With dead ends: 285 [2020-08-19 02:44:19,597 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 02:44:19,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:44:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 02:44:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-19 02:44:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 02:44:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-19 02:44:19,628 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-19 02:44:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:19,628 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-19 02:44:19,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:44:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-19 02:44:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 02:44:19,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:19,630 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:19,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-19 02:44:19,631 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-19 02:44:19,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:19,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807811126] [2020-08-19 02:44:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 02:44:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 02:44:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-19 02:44:19,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807811126] [2020-08-19 02:44:19,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:44:19,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 02:44:19,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512312600] [2020-08-19 02:44:19,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:44:19,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:44:19,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:44:19,768 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-19 02:44:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:19,827 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-19 02:44:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:44:19,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-19 02:44:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:19,829 INFO L225 Difference]: With dead ends: 271 [2020-08-19 02:44:19,829 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 02:44:19,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:44:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 02:44:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-19 02:44:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 02:44:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-19 02:44:19,864 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-19 02:44:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:19,865 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-19 02:44:19,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:44:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-19 02:44:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 02:44:19,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:19,867 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:19,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-19 02:44:19,867 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:19,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-19 02:44:19,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:19,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631024137] [2020-08-19 02:44:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 02:44:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 02:44:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 02:44:20,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631024137] [2020-08-19 02:44:20,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:20,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:44:20,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988440369] [2020-08-19 02:44:20,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:44:20,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:44:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:44:20,154 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-19 02:44:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:20,373 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-19 02:44:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:44:20,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-19 02:44:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:20,375 INFO L225 Difference]: With dead ends: 284 [2020-08-19 02:44:20,376 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 02:44:20,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:44:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 02:44:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-19 02:44:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-19 02:44:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-19 02:44:20,407 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-19 02:44:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:20,407 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-19 02:44:20,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:44:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-19 02:44:20,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 02:44:20,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:20,410 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:20,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-19 02:44:20,410 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-19 02:44:20,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:20,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430505385] [2020-08-19 02:44:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 02:44:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 02:44:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 02:44:20,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430505385] [2020-08-19 02:44:20,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:44:20,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 02:44:20,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772151515] [2020-08-19 02:44:20,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:44:20,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:44:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:44:20,597 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-19 02:44:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:20,704 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-19 02:44:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:44:20,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-19 02:44:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:20,709 INFO L225 Difference]: With dead ends: 303 [2020-08-19 02:44:20,709 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 02:44:20,709 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 [2020-08-19 02:44:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 02:44:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-19 02:44:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-19 02:44:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-19 02:44:20,739 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-19 02:44:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:20,739 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-19 02:44:20,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:44:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-19 02:44:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-19 02:44:20,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:20,741 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:20,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-19 02:44:20,742 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-19 02:44:20,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:20,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366425303] [2020-08-19 02:44:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 02:44:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 02:44:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 02:44:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 02:44:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 02:44:20,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366425303] [2020-08-19 02:44:20,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:20,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:44:20,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479324706] [2020-08-19 02:44:20,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:44:20,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:44:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:44:20,865 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-19 02:44:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:20,959 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-19 02:44:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:44:20,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-19 02:44:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:20,961 INFO L225 Difference]: With dead ends: 409 [2020-08-19 02:44:20,961 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 02:44:20,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:44:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 02:44:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-19 02:44:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 02:44:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-19 02:44:20,980 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-19 02:44:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:20,980 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-19 02:44:20,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:44:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-19 02:44:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 02:44:20,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:20,982 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:20,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-19 02:44:20,982 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:20,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:20,982 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-19 02:44:20,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:20,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447232248] [2020-08-19 02:44:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 02:44:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 02:44:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-19 02:44:21,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447232248] [2020-08-19 02:44:21,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:21,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:44:21,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713486214] [2020-08-19 02:44:21,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:44:21,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:44:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:44:21,180 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-19 02:44:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:21,296 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-19 02:44:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:44:21,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-19 02:44:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:21,298 INFO L225 Difference]: With dead ends: 173 [2020-08-19 02:44:21,298 INFO L226 Difference]: Without dead ends: 163 [2020-08-19 02:44:21,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:44:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-19 02:44:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-19 02:44:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 02:44:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-19 02:44:21,316 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-19 02:44:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:21,316 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-19 02:44:21,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:44:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-19 02:44:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 02:44:21,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:21,318 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:21,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-19 02:44:21,318 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-19 02:44:21,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:21,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538052223] [2020-08-19 02:44:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 02:44:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 02:44:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-19 02:44:21,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538052223] [2020-08-19 02:44:21,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:21,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:44:21,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813564182] [2020-08-19 02:44:21,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:44:21,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:21,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:44:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:44:21,585 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-19 02:44:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:21,827 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-19 02:44:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:44:21,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-19 02:44:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:21,829 INFO L225 Difference]: With dead ends: 175 [2020-08-19 02:44:21,829 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 02:44:21,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:44:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 02:44:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-19 02:44:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 02:44:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-19 02:44:21,846 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-19 02:44:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:21,847 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-19 02:44:21,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:44:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-19 02:44:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 02:44:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:21,848 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:21,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-19 02:44:21,849 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-19 02:44:21,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:21,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434947891] [2020-08-19 02:44:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:21,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 02:44:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 02:44:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-19 02:44:22,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434947891] [2020-08-19 02:44:22,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:44:22,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-19 02:44:22,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188982613] [2020-08-19 02:44:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:44:22,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:44:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:44:22,160 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-19 02:44:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:22,353 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-19 02:44:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:44:22,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-19 02:44:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:22,355 INFO L225 Difference]: With dead ends: 184 [2020-08-19 02:44:22,355 INFO L226 Difference]: Without dead ends: 174 [2020-08-19 02:44:22,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:44:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-19 02:44:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-19 02:44:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 02:44:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-19 02:44:22,375 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-19 02:44:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:22,377 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-19 02:44:22,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:44:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-19 02:44:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 02:44:22,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:22,382 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:22,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-19 02:44:22,382 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-19 02:44:22,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:22,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128613816] [2020-08-19 02:44:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 02:44:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 02:44:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 02:44:22,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128613816] [2020-08-19 02:44:22,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:22,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:44:22,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295507884] [2020-08-19 02:44:22,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:44:22,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:44:22,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:44:22,680 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-19 02:44:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:22,850 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-19 02:44:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:44:22,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-19 02:44:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:22,852 INFO L225 Difference]: With dead ends: 194 [2020-08-19 02:44:22,852 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 02:44:22,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:44:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 02:44:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-19 02:44:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 02:44:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-19 02:44:22,871 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-19 02:44:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:22,872 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-19 02:44:22,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:44:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-19 02:44:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 02:44:22,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:22,873 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:22,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-19 02:44:22,874 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-19 02:44:22,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:22,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288647895] [2020-08-19 02:44:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:22,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 02:44:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 02:44:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-19 02:44:23,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288647895] [2020-08-19 02:44:23,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:23,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:44:23,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069339764] [2020-08-19 02:44:23,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:44:23,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:23,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:44:23,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:44:23,110 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-19 02:44:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:23,272 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-19 02:44:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:44:23,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-19 02:44:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:23,274 INFO L225 Difference]: With dead ends: 160 [2020-08-19 02:44:23,274 INFO L226 Difference]: Without dead ends: 140 [2020-08-19 02:44:23,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:44:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-19 02:44:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-19 02:44:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 02:44:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-19 02:44:23,291 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-19 02:44:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:23,292 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-19 02:44:23,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:44:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-19 02:44:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 02:44:23,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:23,293 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:23,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-19 02:44:23,293 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-19 02:44:23,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:23,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680304066] [2020-08-19 02:44:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 02:44:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 02:44:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 02:44:23,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680304066] [2020-08-19 02:44:23,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:23,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:44:23,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821829721] [2020-08-19 02:44:23,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:44:23,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:23,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:44:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:44:23,656 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-19 02:44:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:23,904 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-19 02:44:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 02:44:23,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-19 02:44:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:23,907 INFO L225 Difference]: With dead ends: 155 [2020-08-19 02:44:23,907 INFO L226 Difference]: Without dead ends: 137 [2020-08-19 02:44:23,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:44:23,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-19 02:44:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-19 02:44:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 02:44:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-19 02:44:23,923 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-19 02:44:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:23,923 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-19 02:44:23,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:44:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-19 02:44:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 02:44:23,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:44:23,925 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:44:23,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-19 02:44:23,925 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:44:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:44:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-19 02:44:23,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:44:23,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343307971] [2020-08-19 02:44:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:44:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:24,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:44:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:24,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:44:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:24,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 02:44:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:24,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 02:44:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:24,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 02:44:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:24,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 02:44:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:44:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-19 02:44:24,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343307971] [2020-08-19 02:44:24,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:44:24,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:44:24,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940069323] [2020-08-19 02:44:24,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:44:24,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:44:24,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:44:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:44:24,208 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-19 02:44:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:44:24,355 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-19 02:44:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:44:24,356 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-19 02:44:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:44:24,356 INFO L225 Difference]: With dead ends: 137 [2020-08-19 02:44:24,356 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:44:24,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:44:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:44:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:44:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:44:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:44:24,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-19 02:44:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:44:24,359 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:44:24,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:44:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:44:24,359 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:44:24,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-19 02:44:24,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:44:25,057 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136 [2020-08-19 02:44:30,091 WARN L193 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 558 DAG size of output: 226 [2020-08-19 02:44:31,599 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 393 DAG size of output: 20