/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:22,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:54:22,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:54:22,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:54:22,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:54:22,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:54:22,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:54:22,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:54:22,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:54:22,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:54:22,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:54:22,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:54:22,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:22,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:22,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:22,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:22,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:22,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:22,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:22,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:22,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:22,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:22,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:22,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:22,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 14:54:22,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:54:22,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:54:22,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:54:22,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:54:22,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:54:22,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:54:22,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:54:22,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:54:22,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:22,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:22,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:22,351 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 [2020-09-24 14:54:22,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:22,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:22,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:22,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:22,403 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:22,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:22,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:22,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:22,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:22,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:22,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:22,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:22,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:22,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:22,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:22,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:22,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:22,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:22,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:22,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:22,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:22,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:22,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:22,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:22,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:22,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:22,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:22,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:22,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:22,410 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:22,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:22,896 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:22,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:22,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:22,903 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:22,904 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-09-24 14:54:22,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f058c57f/5fd10252ae174e0eafda44676314cb8b/FLAG86dca3a2e [2020-09-24 14:54:23,490 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:23,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-09-24 14:54:23,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f058c57f/5fd10252ae174e0eafda44676314cb8b/FLAG86dca3a2e [2020-09-24 14:54:23,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f058c57f/5fd10252ae174e0eafda44676314cb8b [2020-09-24 14:54:23,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:23,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:23,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:23,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:23,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:23,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:23" (1/1) ... [2020-09-24 14:54:23,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78523b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:23, skipping insertion in model container [2020-09-24 14:54:23,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:23" (1/1) ... [2020-09-24 14:54:23,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:23,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:24,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:24,200 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:24,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:24,354 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:24,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24 WrapperNode [2020-09-24 14:54:24,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:24,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:24,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:24,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:24,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (1/1) ... [2020-09-24 14:54:24,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:24,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:24,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:24,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:24,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (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 [2020-09-24 14:54:24,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:24,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 14:54:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 14:54:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 14:54:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 14:54:24,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 14:54:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 14:54:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 14:54:24,488 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 14:54:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 14:54:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 14:54:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:24,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:25,027 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:25,028 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 14:54:25,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:25 BoogieIcfgContainer [2020-09-24 14:54:25,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:25,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:25,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:25,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:25,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:23" (1/3) ... [2020-09-24 14:54:25,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7379d060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:25, skipping insertion in model container [2020-09-24 14:54:25,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:24" (2/3) ... [2020-09-24 14:54:25,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7379d060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:25, skipping insertion in model container [2020-09-24 14:54:25,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:25" (3/3) ... [2020-09-24 14:54:25,045 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-09-24 14:54:25,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:25,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:25,089 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:25,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:25,123 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:25,124 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:25,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:25,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:25,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:25,124 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:25,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-09-24 14:54:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-24 14:54:25,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:25,169 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:25,169 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-09-24 14:54:25,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:25,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671340411] [2020-09-24 14:54:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 14:54:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 14:54:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-24 14:54:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:25,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671340411] [2020-09-24 14:54:25,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:25,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 14:54:25,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366589124] [2020-09-24 14:54:25,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:25,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:25,584 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-09-24 14:54:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:25,736 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-09-24 14:54:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:54:25,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-09-24 14:54:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:25,757 INFO L225 Difference]: With dead ends: 286 [2020-09-24 14:54:25,757 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 14:54:25,763 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 [2020-09-24 14:54:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 14:54:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-09-24 14:54:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-24 14:54:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-09-24 14:54:25,856 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-09-24 14:54:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:25,857 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-09-24 14:54:25,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-09-24 14:54:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 14:54:25,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:25,869 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:25,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:25,870 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-09-24 14:54:25,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:25,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620773404] [2020-09-24 14:54:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 14:54:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:54:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:25,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 14:54:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:26,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620773404] [2020-09-24 14:54:26,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 14:54:26,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891794676] [2020-09-24 14:54:26,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:26,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:26,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:26,021 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-09-24 14:54:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,106 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-09-24 14:54:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:26,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-09-24 14:54:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,110 INFO L225 Difference]: With dead ends: 278 [2020-09-24 14:54:26,110 INFO L226 Difference]: Without dead ends: 169 [2020-09-24 14:54:26,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-24 14:54:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-09-24 14:54:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-24 14:54:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-09-24 14:54:26,131 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-09-24 14:54:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,132 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-09-24 14:54:26,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-09-24 14:54:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 14:54:26,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,135 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:26,136 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-09-24 14:54:26,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:26,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093136427] [2020-09-24 14:54:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 14:54:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 14:54:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-24 14:54:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:26,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093136427] [2020-09-24 14:54:26,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:54:26,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591159179] [2020-09-24 14:54:26,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:26,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:26,273 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-09-24 14:54:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,357 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-09-24 14:54:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:54:26,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-09-24 14:54:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,360 INFO L225 Difference]: With dead ends: 314 [2020-09-24 14:54:26,360 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 14:54:26,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 14:54:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-09-24 14:54:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-09-24 14:54:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-09-24 14:54:26,381 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-09-24 14:54:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,382 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-09-24 14:54:26,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-09-24 14:54:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 14:54:26,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,385 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:54:26,385 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-09-24 14:54:26,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:26,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668824715] [2020-09-24 14:54:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 14:54:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 14:54:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-24 14:54:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:26,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668824715] [2020-09-24 14:54:26,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:54:26,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934382966] [2020-09-24 14:54:26,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:26,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:26,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:26,588 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 5 states. [2020-09-24 14:54:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,699 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-09-24 14:54:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:54:26,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-09-24 14:54:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,702 INFO L225 Difference]: With dead ends: 314 [2020-09-24 14:54:26,702 INFO L226 Difference]: Without dead ends: 194 [2020-09-24 14:54:26,703 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 [2020-09-24 14:54:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-24 14:54:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-09-24 14:54:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 14:54:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-09-24 14:54:26,721 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 108 [2020-09-24 14:54:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,721 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-09-24 14:54:26,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-09-24 14:54:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 14:54:26,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:54:26,724 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:26,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2129807001, now seen corresponding path program 2 times [2020-09-24 14:54:26,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:26,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857484956] [2020-09-24 14:54:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:54:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 14:54:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:54:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:26,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857484956] [2020-09-24 14:54:26,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:26,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 14:54:26,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445064808] [2020-09-24 14:54:26,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:54:26,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:54:26,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:26,884 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 6 states. [2020-09-24 14:54:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:26,977 INFO L93 Difference]: Finished difference Result 348 states and 416 transitions. [2020-09-24 14:54:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:54:26,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-09-24 14:54:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:26,980 INFO L225 Difference]: With dead ends: 348 [2020-09-24 14:54:26,980 INFO L226 Difference]: Without dead ends: 218 [2020-09-24 14:54:26,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-24 14:54:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2020-09-24 14:54:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-24 14:54:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-09-24 14:54:26,996 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-09-24 14:54:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:26,997 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-09-24 14:54:26,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:54:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-09-24 14:54:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-24 14:54:26,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:26,999 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:26,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:54:26,999 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,000 INFO L82 PathProgramCache]: Analyzing trace with hash -902449205, now seen corresponding path program 1 times [2020-09-24 14:54:27,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316927595] [2020-09-24 14:54:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 14:54:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-24 14:54:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 14:54:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:27,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316927595] [2020-09-24 14:54:27,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:27,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 14:54:27,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259481235] [2020-09-24 14:54:27,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:54:27,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:54:27,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:27,152 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 6 states. [2020-09-24 14:54:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,263 INFO L93 Difference]: Finished difference Result 342 states and 410 transitions. [2020-09-24 14:54:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:54:27,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-09-24 14:54:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,266 INFO L225 Difference]: With dead ends: 342 [2020-09-24 14:54:27,267 INFO L226 Difference]: Without dead ends: 214 [2020-09-24 14:54:27,267 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 [2020-09-24 14:54:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-24 14:54:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-09-24 14:54:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-24 14:54:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-09-24 14:54:27,300 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-09-24 14:54:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,302 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-09-24 14:54:27,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:54:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-09-24 14:54:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-24 14:54:27,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,304 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:54:27,305 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash 139965841, now seen corresponding path program 3 times [2020-09-24 14:54:27,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619044375] [2020-09-24 14:54:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 14:54:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 14:54:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-24 14:54:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:27,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619044375] [2020-09-24 14:54:27,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:27,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:54:27,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389378955] [2020-09-24 14:54:27,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:27,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:27,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:27,468 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 7 states. [2020-09-24 14:54:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,585 INFO L93 Difference]: Finished difference Result 375 states and 449 transitions. [2020-09-24 14:54:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:27,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-09-24 14:54:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,589 INFO L225 Difference]: With dead ends: 375 [2020-09-24 14:54:27,589 INFO L226 Difference]: Without dead ends: 240 [2020-09-24 14:54:27,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-24 14:54:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 196. [2020-09-24 14:54:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-24 14:54:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-09-24 14:54:27,605 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-09-24 14:54:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,606 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-09-24 14:54:27,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-09-24 14:54:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-24 14:54:27,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,610 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:54:27,610 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1402676931, now seen corresponding path program 2 times [2020-09-24 14:54:27,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084601432] [2020-09-24 14:54:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-24 14:54:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-24 14:54:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-24 14:54:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:27,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084601432] [2020-09-24 14:54:27,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:27,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:54:27,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026219645] [2020-09-24 14:54:27,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:27,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:27,813 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 7 states. [2020-09-24 14:54:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:27,956 INFO L93 Difference]: Finished difference Result 361 states and 435 transitions. [2020-09-24 14:54:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 14:54:27,958 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-09-24 14:54:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:27,960 INFO L225 Difference]: With dead ends: 361 [2020-09-24 14:54:27,960 INFO L226 Difference]: Without dead ends: 228 [2020-09-24 14:54:27,961 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 [2020-09-24 14:54:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-24 14:54:27,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-09-24 14:54:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-24 14:54:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-09-24 14:54:27,973 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-09-24 14:54:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:27,974 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-09-24 14:54:27,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-09-24 14:54:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 14:54:27,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:27,976 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:27,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:54:27,976 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:27,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash -229056103, now seen corresponding path program 4 times [2020-09-24 14:54:27,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:27,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758862571] [2020-09-24 14:54:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-24 14:54:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 14:54:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 14:54:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:28,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758862571] [2020-09-24 14:54:28,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:28,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:54:28,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835239020] [2020-09-24 14:54:28,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:54:28,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:54:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:28,133 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 8 states. [2020-09-24 14:54:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:28,277 INFO L93 Difference]: Finished difference Result 402 states and 482 transitions. [2020-09-24 14:54:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:54:28,278 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-09-24 14:54:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:28,280 INFO L225 Difference]: With dead ends: 402 [2020-09-24 14:54:28,280 INFO L226 Difference]: Without dead ends: 262 [2020-09-24 14:54:28,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-24 14:54:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 206. [2020-09-24 14:54:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-24 14:54:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-09-24 14:54:28,296 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-09-24 14:54:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:28,296 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-09-24 14:54:28,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:54:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-09-24 14:54:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 14:54:28,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:28,298 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:28,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:54:28,299 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:28,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1033654987, now seen corresponding path program 3 times [2020-09-24 14:54:28,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:28,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62954895] [2020-09-24 14:54:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-24 14:54:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 14:54:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 14:54:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:28,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62954895] [2020-09-24 14:54:28,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:28,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 14:54:28,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092294768] [2020-09-24 14:54:28,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:54:28,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:28,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:54:28,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:54:28,524 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 8 states. [2020-09-24 14:54:28,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:28,731 INFO L93 Difference]: Finished difference Result 380 states and 460 transitions. [2020-09-24 14:54:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 14:54:28,748 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-09-24 14:54:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:28,750 INFO L225 Difference]: With dead ends: 380 [2020-09-24 14:54:28,750 INFO L226 Difference]: Without dead ends: 242 [2020-09-24 14:54:28,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-24 14:54:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2020-09-24 14:54:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-24 14:54:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-09-24 14:54:28,767 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-09-24 14:54:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:28,768 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-09-24 14:54:28,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:54:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-09-24 14:54:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 14:54:28,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:28,770 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:28,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:54:28,770 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1138358929, now seen corresponding path program 5 times [2020-09-24 14:54:28,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:28,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672252902] [2020-09-24 14:54:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 14:54:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 14:54:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-24 14:54:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:28,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672252902] [2020-09-24 14:54:28,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:28,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:54:28,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045281757] [2020-09-24 14:54:28,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:54:28,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:54:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:28,935 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 9 states. [2020-09-24 14:54:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:29,065 INFO L93 Difference]: Finished difference Result 429 states and 515 transitions. [2020-09-24 14:54:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:54:29,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-09-24 14:54:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:29,067 INFO L225 Difference]: With dead ends: 429 [2020-09-24 14:54:29,067 INFO L226 Difference]: Without dead ends: 284 [2020-09-24 14:54:29,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-24 14:54:29,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2020-09-24 14:54:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-24 14:54:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-09-24 14:54:29,080 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-09-24 14:54:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:29,081 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-09-24 14:54:29,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:54:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-09-24 14:54:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 14:54:29,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:29,083 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:29,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:54:29,083 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1893897277, now seen corresponding path program 4 times [2020-09-24 14:54:29,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:29,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976644434] [2020-09-24 14:54:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 14:54:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-24 14:54:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-24 14:54:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:29,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976644434] [2020-09-24 14:54:29,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:29,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:54:29,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347439306] [2020-09-24 14:54:29,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:54:29,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:29,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:54:29,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:54:29,276 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 9 states. [2020-09-24 14:54:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:29,449 INFO L93 Difference]: Finished difference Result 399 states and 485 transitions. [2020-09-24 14:54:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:54:29,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-09-24 14:54:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:29,452 INFO L225 Difference]: With dead ends: 399 [2020-09-24 14:54:29,452 INFO L226 Difference]: Without dead ends: 256 [2020-09-24 14:54:29,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-24 14:54:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2020-09-24 14:54:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-24 14:54:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-09-24 14:54:29,464 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-09-24 14:54:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:29,464 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-09-24 14:54:29,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:54:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-09-24 14:54:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 14:54:29,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:29,466 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:29,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:54:29,467 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:29,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1450818713, now seen corresponding path program 6 times [2020-09-24 14:54:29,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:29,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840540052] [2020-09-24 14:54:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:54:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-24 14:54:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 14:54:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:29,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840540052] [2020-09-24 14:54:29,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:29,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:54:29,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416106292] [2020-09-24 14:54:29,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:54:29,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:29,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:54:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:29,628 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 10 states. [2020-09-24 14:54:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:29,735 INFO L93 Difference]: Finished difference Result 456 states and 548 transitions. [2020-09-24 14:54:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:54:29,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-09-24 14:54:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:29,738 INFO L225 Difference]: With dead ends: 456 [2020-09-24 14:54:29,738 INFO L226 Difference]: Without dead ends: 306 [2020-09-24 14:54:29,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-09-24 14:54:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2020-09-24 14:54:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 14:54:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-09-24 14:54:29,751 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-09-24 14:54:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:29,751 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-09-24 14:54:29,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:54:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-09-24 14:54:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 14:54:29,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:29,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:29,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:54:29,754 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:29,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1581437493, now seen corresponding path program 5 times [2020-09-24 14:54:29,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:29,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373958209] [2020-09-24 14:54:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-24 14:54:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-24 14:54:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 14:54:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 7 proven. 89 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:29,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373958209] [2020-09-24 14:54:29,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:29,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:54:29,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063898089] [2020-09-24 14:54:29,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:54:29,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:54:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:54:29,973 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 10 states. [2020-09-24 14:54:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:30,254 INFO L93 Difference]: Finished difference Result 418 states and 510 transitions. [2020-09-24 14:54:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 14:54:30,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-09-24 14:54:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:30,258 INFO L225 Difference]: With dead ends: 418 [2020-09-24 14:54:30,258 INFO L226 Difference]: Without dead ends: 270 [2020-09-24 14:54:30,259 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 [2020-09-24 14:54:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-24 14:54:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 226. [2020-09-24 14:54:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 14:54:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-09-24 14:54:30,277 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-09-24 14:54:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:30,277 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-09-24 14:54:30,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:54:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-09-24 14:54:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 14:54:30,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:30,282 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:30,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:54:30,282 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:30,283 INFO L82 PathProgramCache]: Analyzing trace with hash 688521105, now seen corresponding path program 7 times [2020-09-24 14:54:30,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:30,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395531499] [2020-09-24 14:54:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 14:54:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 14:54:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 14:54:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 6 proven. 131 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:30,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395531499] [2020-09-24 14:54:30,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:30,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:54:30,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398045948] [2020-09-24 14:54:30,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:54:30,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:30,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:54:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:30,540 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 11 states. [2020-09-24 14:54:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:30,757 INFO L93 Difference]: Finished difference Result 483 states and 581 transitions. [2020-09-24 14:54:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:54:30,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-09-24 14:54:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:30,760 INFO L225 Difference]: With dead ends: 483 [2020-09-24 14:54:30,761 INFO L226 Difference]: Without dead ends: 328 [2020-09-24 14:54:30,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:54:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-24 14:54:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 236. [2020-09-24 14:54:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-24 14:54:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-09-24 14:54:30,777 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-09-24 14:54:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:30,778 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-09-24 14:54:30,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:54:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-09-24 14:54:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 14:54:30,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:30,780 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:30,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:54:30,781 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1951232195, now seen corresponding path program 6 times [2020-09-24 14:54:30,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:30,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131581781] [2020-09-24 14:54:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:30,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 14:54:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 14:54:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 14:54:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:31,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131581781] [2020-09-24 14:54:31,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:31,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:54:31,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958077672] [2020-09-24 14:54:31,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:54:31,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:54:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:31,158 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 11 states. [2020-09-24 14:54:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:31,480 INFO L93 Difference]: Finished difference Result 437 states and 535 transitions. [2020-09-24 14:54:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:54:31,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-09-24 14:54:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:31,483 INFO L225 Difference]: With dead ends: 437 [2020-09-24 14:54:31,483 INFO L226 Difference]: Without dead ends: 284 [2020-09-24 14:54:31,485 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 [2020-09-24 14:54:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-24 14:54:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2020-09-24 14:54:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-09-24 14:54:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-09-24 14:54:31,504 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-09-24 14:54:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:31,504 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-09-24 14:54:31,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:54:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-09-24 14:54:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-24 14:54:31,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:31,508 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:31,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:54:31,509 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1216030823, now seen corresponding path program 8 times [2020-09-24 14:54:31,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:31,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185907258] [2020-09-24 14:54:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:54:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-24 14:54:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 14:54:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:31,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185907258] [2020-09-24 14:54:31,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:31,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:54:31,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921925480] [2020-09-24 14:54:31,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:54:31,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:54:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:54:31,799 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 12 states. [2020-09-24 14:54:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:32,003 INFO L93 Difference]: Finished difference Result 510 states and 614 transitions. [2020-09-24 14:54:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 14:54:32,004 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-09-24 14:54:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:32,006 INFO L225 Difference]: With dead ends: 510 [2020-09-24 14:54:32,006 INFO L226 Difference]: Without dead ends: 350 [2020-09-24 14:54:32,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-09-24 14:54:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2020-09-24 14:54:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-24 14:54:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-09-24 14:54:32,021 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-09-24 14:54:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:32,021 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-09-24 14:54:32,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:54:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-09-24 14:54:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-24 14:54:32,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:32,023 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:32,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 14:54:32,024 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash 46680267, now seen corresponding path program 7 times [2020-09-24 14:54:32,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:32,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867474850] [2020-09-24 14:54:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 14:54:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-24 14:54:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 14:54:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:32,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867474850] [2020-09-24 14:54:32,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:32,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:54:32,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385563840] [2020-09-24 14:54:32,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:54:32,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:54:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:54:32,327 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 12 states. [2020-09-24 14:54:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:32,583 INFO L93 Difference]: Finished difference Result 456 states and 560 transitions. [2020-09-24 14:54:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 14:54:32,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-09-24 14:54:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:32,586 INFO L225 Difference]: With dead ends: 456 [2020-09-24 14:54:32,586 INFO L226 Difference]: Without dead ends: 298 [2020-09-24 14:54:32,587 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 [2020-09-24 14:54:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-24 14:54:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2020-09-24 14:54:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-24 14:54:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-09-24 14:54:32,601 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-09-24 14:54:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:32,601 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-09-24 14:54:32,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:54:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-09-24 14:54:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-24 14:54:32,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:32,603 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:32,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 14:54:32,604 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash -910703471, now seen corresponding path program 9 times [2020-09-24 14:54:32,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:32,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145131334] [2020-09-24 14:54:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-24 14:54:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-24 14:54:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-24 14:54:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:32,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145131334] [2020-09-24 14:54:32,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:32,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:54:32,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449059497] [2020-09-24 14:54:32,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:54:32,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:54:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:32,859 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 13 states. [2020-09-24 14:54:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:33,100 INFO L93 Difference]: Finished difference Result 537 states and 647 transitions. [2020-09-24 14:54:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 14:54:33,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-09-24 14:54:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:33,105 INFO L225 Difference]: With dead ends: 537 [2020-09-24 14:54:33,105 INFO L226 Difference]: Without dead ends: 372 [2020-09-24 14:54:33,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-09-24 14:54:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 256. [2020-09-24 14:54:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-24 14:54:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-09-24 14:54:33,137 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-09-24 14:54:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:33,138 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-09-24 14:54:33,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:54:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-09-24 14:54:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-24 14:54:33,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:33,143 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:33,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 14:54:33,143 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:33,143 INFO L82 PathProgramCache]: Analyzing trace with hash 352007619, now seen corresponding path program 8 times [2020-09-24 14:54:33,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:33,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907164572] [2020-09-24 14:54:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-24 14:54:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-24 14:54:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-24 14:54:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 7 proven. 194 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:33,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907164572] [2020-09-24 14:54:33,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:33,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 14:54:33,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31881534] [2020-09-24 14:54:33,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 14:54:33,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 14:54:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:54:33,629 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 13 states. [2020-09-24 14:54:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:34,132 INFO L93 Difference]: Finished difference Result 475 states and 585 transitions. [2020-09-24 14:54:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 14:54:34,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-09-24 14:54:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:34,141 INFO L225 Difference]: With dead ends: 475 [2020-09-24 14:54:34,141 INFO L226 Difference]: Without dead ends: 312 [2020-09-24 14:54:34,143 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 [2020-09-24 14:54:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-24 14:54:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 256. [2020-09-24 14:54:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-24 14:54:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-09-24 14:54:34,164 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-09-24 14:54:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:34,165 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-09-24 14:54:34,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 14:54:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-09-24 14:54:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 14:54:34,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:34,170 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:34,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 14:54:34,170 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1515572583, now seen corresponding path program 10 times [2020-09-24 14:54:34,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:34,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973621465] [2020-09-24 14:54:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 14:54:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-24 14:54:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 14:54:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 6 proven. 257 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:34,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973621465] [2020-09-24 14:54:34,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:34,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:54:34,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224761622] [2020-09-24 14:54:34,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:54:34,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:54:34,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:34,467 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 14 states. [2020-09-24 14:54:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:34,726 INFO L93 Difference]: Finished difference Result 564 states and 680 transitions. [2020-09-24 14:54:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:54:34,726 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-09-24 14:54:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:34,729 INFO L225 Difference]: With dead ends: 564 [2020-09-24 14:54:34,729 INFO L226 Difference]: Without dead ends: 394 [2020-09-24 14:54:34,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-24 14:54:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 266. [2020-09-24 14:54:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-24 14:54:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-09-24 14:54:34,758 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-09-24 14:54:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:34,758 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-09-24 14:54:34,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:54:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-09-24 14:54:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 14:54:34,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:34,761 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:34,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 14:54:34,763 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash -252861493, now seen corresponding path program 9 times [2020-09-24 14:54:34,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:34,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133298844] [2020-09-24 14:54:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:34,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 14:54:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-24 14:54:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 14:54:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 7 proven. 239 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:35,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133298844] [2020-09-24 14:54:35,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:35,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 14:54:35,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607590797] [2020-09-24 14:54:35,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 14:54:35,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 14:54:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-24 14:54:35,166 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 14 states. [2020-09-24 14:54:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:35,577 INFO L93 Difference]: Finished difference Result 494 states and 610 transitions. [2020-09-24 14:54:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 14:54:35,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-09-24 14:54:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:35,583 INFO L225 Difference]: With dead ends: 494 [2020-09-24 14:54:35,583 INFO L226 Difference]: Without dead ends: 326 [2020-09-24 14:54:35,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-09-24 14:54:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 266. [2020-09-24 14:54:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-24 14:54:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-09-24 14:54:35,607 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-09-24 14:54:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:35,607 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-09-24 14:54:35,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 14:54:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-09-24 14:54:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 14:54:35,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:35,612 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:35,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 14:54:35,612 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 867387793, now seen corresponding path program 11 times [2020-09-24 14:54:35,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:35,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105938890] [2020-09-24 14:54:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 14:54:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 14:54:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:35,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 14:54:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 6 proven. 309 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:36,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105938890] [2020-09-24 14:54:36,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:36,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:54:36,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136658525] [2020-09-24 14:54:36,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:54:36,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:54:36,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:36,044 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 15 states. [2020-09-24 14:54:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:36,269 INFO L93 Difference]: Finished difference Result 591 states and 713 transitions. [2020-09-24 14:54:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:54:36,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-09-24 14:54:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:36,276 INFO L225 Difference]: With dead ends: 591 [2020-09-24 14:54:36,276 INFO L226 Difference]: Without dead ends: 416 [2020-09-24 14:54:36,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-09-24 14:54:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 276. [2020-09-24 14:54:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-24 14:54:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-09-24 14:54:36,297 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-09-24 14:54:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:36,297 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-09-24 14:54:36,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:54:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-09-24 14:54:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 14:54:36,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:36,303 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:36,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 14:54:36,304 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2130098883, now seen corresponding path program 10 times [2020-09-24 14:54:36,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:36,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819703858] [2020-09-24 14:54:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 14:54:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 14:54:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 14:54:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 7 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:36,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819703858] [2020-09-24 14:54:36,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:36,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 14:54:36,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142022578] [2020-09-24 14:54:36,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 14:54:36,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:36,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 14:54:36,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-24 14:54:36,791 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 15 states. [2020-09-24 14:54:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:37,239 INFO L93 Difference]: Finished difference Result 513 states and 635 transitions. [2020-09-24 14:54:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 14:54:37,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-09-24 14:54:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:37,245 INFO L225 Difference]: With dead ends: 513 [2020-09-24 14:54:37,245 INFO L226 Difference]: Without dead ends: 340 [2020-09-24 14:54:37,247 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 [2020-09-24 14:54:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-24 14:54:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 276. [2020-09-24 14:54:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-24 14:54:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-09-24 14:54:37,273 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-09-24 14:54:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:37,273 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-09-24 14:54:37,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 14:54:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-09-24 14:54:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 14:54:37,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:37,276 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:37,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 14:54:37,282 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash 890883481, now seen corresponding path program 12 times [2020-09-24 14:54:37,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:37,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691152378] [2020-09-24 14:54:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 14:54:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-24 14:54:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:54:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 366 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:37,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691152378] [2020-09-24 14:54:37,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:37,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:54:37,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995442782] [2020-09-24 14:54:37,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:54:37,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:37,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:54:37,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:37,630 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 16 states. [2020-09-24 14:54:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:37,864 INFO L93 Difference]: Finished difference Result 618 states and 746 transitions. [2020-09-24 14:54:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 14:54:37,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-09-24 14:54:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:37,868 INFO L225 Difference]: With dead ends: 618 [2020-09-24 14:54:37,868 INFO L226 Difference]: Without dead ends: 438 [2020-09-24 14:54:37,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-09-24 14:54:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2020-09-24 14:54:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-24 14:54:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-09-24 14:54:37,891 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-09-24 14:54:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:37,892 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-09-24 14:54:37,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:54:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-09-24 14:54:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-24 14:54:37,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:37,895 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:37,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 14:54:37,895 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2141372725, now seen corresponding path program 11 times [2020-09-24 14:54:37,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:37,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487569932] [2020-09-24 14:54:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:37,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 14:54:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-09-24 14:54:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 14:54:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 7 proven. 344 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:38,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487569932] [2020-09-24 14:54:38,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:38,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 14:54:38,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475569513] [2020-09-24 14:54:38,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 14:54:38,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:38,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 14:54:38,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:54:38,329 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 16 states. [2020-09-24 14:54:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:38,810 INFO L93 Difference]: Finished difference Result 532 states and 660 transitions. [2020-09-24 14:54:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 14:54:38,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-09-24 14:54:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:38,815 INFO L225 Difference]: With dead ends: 532 [2020-09-24 14:54:38,816 INFO L226 Difference]: Without dead ends: 354 [2020-09-24 14:54:38,820 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 [2020-09-24 14:54:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-09-24 14:54:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 286. [2020-09-24 14:54:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-24 14:54:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-09-24 14:54:38,843 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-09-24 14:54:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:38,843 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-09-24 14:54:38,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 14:54:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-09-24 14:54:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 14:54:38,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:38,848 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:38,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 14:54:38,849 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1892454033, now seen corresponding path program 13 times [2020-09-24 14:54:38,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:38,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147207049] [2020-09-24 14:54:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:38,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-24 14:54:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 14:54:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 14:54:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 6 proven. 428 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:39,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147207049] [2020-09-24 14:54:39,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:39,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:54:39,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226556723] [2020-09-24 14:54:39,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:54:39,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:39,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:54:39,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:39,199 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 17 states. [2020-09-24 14:54:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:39,451 INFO L93 Difference]: Finished difference Result 645 states and 779 transitions. [2020-09-24 14:54:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:54:39,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-09-24 14:54:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:39,454 INFO L225 Difference]: With dead ends: 645 [2020-09-24 14:54:39,454 INFO L226 Difference]: Without dead ends: 460 [2020-09-24 14:54:39,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-09-24 14:54:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 296. [2020-09-24 14:54:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-09-24 14:54:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-09-24 14:54:39,485 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-09-24 14:54:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:39,485 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-09-24 14:54:39,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:54:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-09-24 14:54:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 14:54:39,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:39,488 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:39,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 14:54:39,488 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1139802173, now seen corresponding path program 12 times [2020-09-24 14:54:39,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:39,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141549135] [2020-09-24 14:54:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-24 14:54:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-09-24 14:54:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 14:54:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 7 proven. 404 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:39,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141549135] [2020-09-24 14:54:39,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:39,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:54:39,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185047071] [2020-09-24 14:54:39,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:54:39,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:39,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:54:39,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:39,947 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 17 states. [2020-09-24 14:54:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:40,452 INFO L93 Difference]: Finished difference Result 551 states and 685 transitions. [2020-09-24 14:54:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:54:40,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-09-24 14:54:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:40,455 INFO L225 Difference]: With dead ends: 551 [2020-09-24 14:54:40,455 INFO L226 Difference]: Without dead ends: 368 [2020-09-24 14:54:40,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-09-24 14:54:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2020-09-24 14:54:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-09-24 14:54:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-09-24 14:54:40,471 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-09-24 14:54:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:40,471 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-09-24 14:54:40,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:54:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-09-24 14:54:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 14:54:40,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:40,474 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:40,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 14:54:40,475 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -33314663, now seen corresponding path program 14 times [2020-09-24 14:54:40,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:40,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438144662] [2020-09-24 14:54:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-24 14:54:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 14:54:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 14:54:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 6 proven. 495 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:40,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438144662] [2020-09-24 14:54:40,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:40,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:54:40,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721861875] [2020-09-24 14:54:40,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:54:40,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:40,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:54:40,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:40,827 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 18 states. [2020-09-24 14:54:41,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:41,172 INFO L93 Difference]: Finished difference Result 672 states and 812 transitions. [2020-09-24 14:54:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:54:41,173 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-09-24 14:54:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:41,177 INFO L225 Difference]: With dead ends: 672 [2020-09-24 14:54:41,177 INFO L226 Difference]: Without dead ends: 482 [2020-09-24 14:54:41,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-09-24 14:54:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2020-09-24 14:54:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-09-24 14:54:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-09-24 14:54:41,203 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-09-24 14:54:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:41,204 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-09-24 14:54:41,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:54:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-09-24 14:54:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 14:54:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:41,209 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:41,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-24 14:54:41,210 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1229396427, now seen corresponding path program 13 times [2020-09-24 14:54:41,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:41,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337751623] [2020-09-24 14:54:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-09-24 14:54:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-09-24 14:54:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 14:54:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 7 proven. 469 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:41,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337751623] [2020-09-24 14:54:41,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:41,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:54:41,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479097798] [2020-09-24 14:54:41,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:54:41,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:41,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:54:41,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:41,718 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 18 states. [2020-09-24 14:54:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:42,404 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-09-24 14:54:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:54:42,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-09-24 14:54:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:42,407 INFO L225 Difference]: With dead ends: 570 [2020-09-24 14:54:42,407 INFO L226 Difference]: Without dead ends: 382 [2020-09-24 14:54:42,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-09-24 14:54:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2020-09-24 14:54:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-09-24 14:54:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-09-24 14:54:42,425 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-09-24 14:54:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:42,425 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-09-24 14:54:42,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:54:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-09-24 14:54:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-24 14:54:42,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:42,428 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:42,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-24 14:54:42,429 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2032954479, now seen corresponding path program 15 times [2020-09-24 14:54:42,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:42,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404595501] [2020-09-24 14:54:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-24 14:54:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-09-24 14:54:42,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404595501] [2020-09-24 14:54:42,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:42,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:54:42,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679971756] [2020-09-24 14:54:42,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:54:42,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:54:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:54:42,519 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 3 states. [2020-09-24 14:54:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:42,536 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-09-24 14:54:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:54:42,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2020-09-24 14:54:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:42,539 INFO L225 Difference]: With dead ends: 321 [2020-09-24 14:54:42,539 INFO L226 Difference]: Without dead ends: 305 [2020-09-24 14:54:42,540 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 [2020-09-24 14:54:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-09-24 14:54:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2020-09-24 14:54:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-24 14:54:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2020-09-24 14:54:42,560 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 178 [2020-09-24 14:54:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:42,560 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2020-09-24 14:54:42,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:54:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2020-09-24 14:54:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 14:54:42,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:42,562 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:42,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-24 14:54:42,563 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:42,563 INFO L82 PathProgramCache]: Analyzing trace with hash 368593816, now seen corresponding path program 1 times [2020-09-24 14:54:42,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:42,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579383325] [2020-09-24 14:54:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-24 14:54:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-09-24 14:54:42,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579383325] [2020-09-24 14:54:42,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:42,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 14:54:42,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927437542] [2020-09-24 14:54:42,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 14:54:42,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 14:54:42,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 14:54:42,691 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand 4 states. [2020-09-24 14:54:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:42,717 INFO L93 Difference]: Finished difference Result 321 states and 392 transitions. [2020-09-24 14:54:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 14:54:42,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-09-24 14:54:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:42,721 INFO L225 Difference]: With dead ends: 321 [2020-09-24 14:54:42,721 INFO L226 Difference]: Without dead ends: 304 [2020-09-24 14:54:42,722 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 [2020-09-24 14:54:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-24 14:54:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-09-24 14:54:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-09-24 14:54:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2020-09-24 14:54:42,740 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 372 transitions. Word has length 180 [2020-09-24 14:54:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:42,740 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 372 transitions. [2020-09-24 14:54:42,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 14:54:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 372 transitions. [2020-09-24 14:54:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 14:54:42,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:42,742 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:42,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-24 14:54:42,742 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:42,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1683689272, now seen corresponding path program 1 times [2020-09-24 14:54:42,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:42,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200265040] [2020-09-24 14:54:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-24 14:54:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 6 proven. 567 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:43,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200265040] [2020-09-24 14:54:43,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:43,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:54:43,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760895954] [2020-09-24 14:54:43,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:54:43,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:54:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:43,159 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. Second operand 19 states. [2020-09-24 14:54:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:43,485 INFO L93 Difference]: Finished difference Result 695 states and 837 transitions. [2020-09-24 14:54:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:54:43,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-09-24 14:54:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:43,489 INFO L225 Difference]: With dead ends: 695 [2020-09-24 14:54:43,489 INFO L226 Difference]: Without dead ends: 502 [2020-09-24 14:54:43,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:54:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-24 14:54:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2020-09-24 14:54:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-09-24 14:54:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-09-24 14:54:43,514 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-09-24 14:54:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:43,514 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-09-24 14:54:43,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:54:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-09-24 14:54:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-24 14:54:43,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:43,516 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:43,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-24 14:54:43,517 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:43,517 INFO L82 PathProgramCache]: Analyzing trace with hash -326698006, now seen corresponding path program 1 times [2020-09-24 14:54:43,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:43,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165607546] [2020-09-24 14:54:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-24 14:54:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-09-24 14:54:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-09-24 14:54:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 7 proven. 539 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:44,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165607546] [2020-09-24 14:54:44,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:44,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:54:44,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423531007] [2020-09-24 14:54:44,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:54:44,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:44,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:54:44,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:44,099 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 19 states. [2020-09-24 14:54:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:44,845 INFO L93 Difference]: Finished difference Result 585 states and 727 transitions. [2020-09-24 14:54:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:54:44,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-09-24 14:54:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:44,851 INFO L225 Difference]: With dead ends: 585 [2020-09-24 14:54:44,852 INFO L226 Difference]: Without dead ends: 394 [2020-09-24 14:54:44,855 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 [2020-09-24 14:54:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-24 14:54:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 314. [2020-09-24 14:54:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-09-24 14:54:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-09-24 14:54:44,872 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-09-24 14:54:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:44,872 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-09-24 14:54:44,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:54:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-09-24 14:54:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-24 14:54:44,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:44,874 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:44,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-24 14:54:44,875 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1714201280, now seen corresponding path program 2 times [2020-09-24 14:54:44,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:44,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873989212] [2020-09-24 14:54:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-24 14:54:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-09-24 14:54:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-09-24 14:54:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 6 proven. 644 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:45,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873989212] [2020-09-24 14:54:45,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:45,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 14:54:45,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449986357] [2020-09-24 14:54:45,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 14:54:45,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 14:54:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:54:45,326 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 20 states. [2020-09-24 14:54:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:45,632 INFO L93 Difference]: Finished difference Result 722 states and 870 transitions. [2020-09-24 14:54:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:54:45,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-09-24 14:54:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:45,637 INFO L225 Difference]: With dead ends: 722 [2020-09-24 14:54:45,637 INFO L226 Difference]: Without dead ends: 524 [2020-09-24 14:54:45,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-09-24 14:54:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2020-09-24 14:54:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-09-24 14:54:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-09-24 14:54:45,656 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-09-24 14:54:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:45,657 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-09-24 14:54:45,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 14:54:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-09-24 14:54:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-24 14:54:45,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:45,659 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:45,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-24 14:54:45,659 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash 570378738, now seen corresponding path program 2 times [2020-09-24 14:54:45,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:45,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585373979] [2020-09-24 14:54:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-24 14:54:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-09-24 14:54:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-09-24 14:54:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 7 proven. 614 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:46,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585373979] [2020-09-24 14:54:46,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:46,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 14:54:46,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68828794] [2020-09-24 14:54:46,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 14:54:46,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 14:54:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-24 14:54:46,281 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 20 states. [2020-09-24 14:54:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:47,064 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2020-09-24 14:54:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 14:54:47,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-09-24 14:54:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:47,067 INFO L225 Difference]: With dead ends: 604 [2020-09-24 14:54:47,067 INFO L226 Difference]: Without dead ends: 408 [2020-09-24 14:54:47,068 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 [2020-09-24 14:54:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-09-24 14:54:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 324. [2020-09-24 14:54:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-09-24 14:54:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-09-24 14:54:47,084 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-09-24 14:54:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:47,085 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-09-24 14:54:47,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 14:54:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-09-24 14:54:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 14:54:47,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:47,087 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:47,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-24 14:54:47,087 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash 922915896, now seen corresponding path program 3 times [2020-09-24 14:54:47,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:47,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320134251] [2020-09-24 14:54:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-24 14:54:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-24 14:54:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-24 14:54:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 6 proven. 726 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:47,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320134251] [2020-09-24 14:54:47,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:47,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 14:54:47,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899648674] [2020-09-24 14:54:47,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 14:54:47,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:47,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 14:54:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:47,582 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 21 states. [2020-09-24 14:54:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:47,944 INFO L93 Difference]: Finished difference Result 749 states and 903 transitions. [2020-09-24 14:54:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:54:47,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-09-24 14:54:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:47,948 INFO L225 Difference]: With dead ends: 749 [2020-09-24 14:54:47,948 INFO L226 Difference]: Without dead ends: 546 [2020-09-24 14:54:47,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-09-24 14:54:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 334. [2020-09-24 14:54:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-09-24 14:54:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-09-24 14:54:47,968 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-09-24 14:54:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:47,969 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-09-24 14:54:47,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 14:54:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-09-24 14:54:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 14:54:47,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:47,971 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:47,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-24 14:54:47,971 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:47,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1087471382, now seen corresponding path program 3 times [2020-09-24 14:54:47,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:47,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261252960] [2020-09-24 14:54:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-09-24 14:54:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-24 14:54:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-24 14:54:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 7 proven. 694 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:48,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261252960] [2020-09-24 14:54:48,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:48,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 14:54:48,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084094488] [2020-09-24 14:54:48,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 14:54:48,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 14:54:48,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:54:48,589 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 21 states. [2020-09-24 14:54:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:49,551 INFO L93 Difference]: Finished difference Result 623 states and 777 transitions. [2020-09-24 14:54:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:54:49,555 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-09-24 14:54:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:49,558 INFO L225 Difference]: With dead ends: 623 [2020-09-24 14:54:49,558 INFO L226 Difference]: Without dead ends: 422 [2020-09-24 14:54:49,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-09-24 14:54:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 334. [2020-09-24 14:54:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-09-24 14:54:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-09-24 14:54:49,590 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-09-24 14:54:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:49,590 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-09-24 14:54:49,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 14:54:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-09-24 14:54:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 14:54:49,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:49,592 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:49,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-24 14:54:49,593 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1276573760, now seen corresponding path program 4 times [2020-09-24 14:54:49,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:49,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456182212] [2020-09-24 14:54:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:49,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-24 14:54:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-24 14:54:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 14:54:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 6 proven. 813 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:50,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456182212] [2020-09-24 14:54:50,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:50,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:54:50,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845539540] [2020-09-24 14:54:50,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:54:50,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:50,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:54:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:50,095 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 22 states. [2020-09-24 14:54:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:50,507 INFO L93 Difference]: Finished difference Result 776 states and 936 transitions. [2020-09-24 14:54:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:54:50,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-09-24 14:54:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:50,513 INFO L225 Difference]: With dead ends: 776 [2020-09-24 14:54:50,513 INFO L226 Difference]: Without dead ends: 568 [2020-09-24 14:54:50,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-09-24 14:54:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2020-09-24 14:54:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-09-24 14:54:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-09-24 14:54:50,543 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-09-24 14:54:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:50,548 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-09-24 14:54:50,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:54:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-09-24 14:54:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 14:54:50,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:50,551 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:50,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-24 14:54:50,552 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash -733813518, now seen corresponding path program 4 times [2020-09-24 14:54:50,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:50,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529331779] [2020-09-24 14:54:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-09-24 14:54:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-09-24 14:54:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-09-24 14:54:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 7 proven. 779 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:51,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529331779] [2020-09-24 14:54:51,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:51,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:54:51,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471132155] [2020-09-24 14:54:51,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:54:51,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:51,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:54:51,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:51,237 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 22 states. [2020-09-24 14:54:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:52,255 INFO L93 Difference]: Finished difference Result 642 states and 802 transitions. [2020-09-24 14:54:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:54:52,257 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-09-24 14:54:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:52,259 INFO L225 Difference]: With dead ends: 642 [2020-09-24 14:54:52,259 INFO L226 Difference]: Without dead ends: 436 [2020-09-24 14:54:52,260 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 [2020-09-24 14:54:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-09-24 14:54:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 344. [2020-09-24 14:54:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-09-24 14:54:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-09-24 14:54:52,278 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-09-24 14:54:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:52,278 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-09-24 14:54:52,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:54:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-09-24 14:54:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 14:54:52,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:52,280 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:52,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-24 14:54:52,280 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -171452104, now seen corresponding path program 5 times [2020-09-24 14:54:52,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:52,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802281822] [2020-09-24 14:54:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-24 14:54:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 14:54:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-24 14:54:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 6 proven. 905 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:52,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802281822] [2020-09-24 14:54:52,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:52,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 14:54:52,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649649827] [2020-09-24 14:54:52,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 14:54:52,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:52,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 14:54:52,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:52,894 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 23 states. [2020-09-24 14:54:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:53,187 INFO L93 Difference]: Finished difference Result 803 states and 969 transitions. [2020-09-24 14:54:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 14:54:53,188 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-09-24 14:54:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:53,191 INFO L225 Difference]: With dead ends: 803 [2020-09-24 14:54:53,191 INFO L226 Difference]: Without dead ends: 590 [2020-09-24 14:54:53,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-09-24 14:54:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 354. [2020-09-24 14:54:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-09-24 14:54:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-09-24 14:54:53,211 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-09-24 14:54:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:53,212 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-09-24 14:54:53,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 14:54:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-09-24 14:54:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 14:54:53,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:53,214 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:53,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-24 14:54:53,214 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:53,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2113127914, now seen corresponding path program 5 times [2020-09-24 14:54:53,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:53,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140340853] [2020-09-24 14:54:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-09-24 14:54:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-24 14:54:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-09-24 14:54:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 7 proven. 869 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:54,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140340853] [2020-09-24 14:54:54,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:54,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 14:54:54,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985817676] [2020-09-24 14:54:54,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 14:54:54,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 14:54:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-09-24 14:54:54,077 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 23 states. [2020-09-24 14:54:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:55,132 INFO L93 Difference]: Finished difference Result 661 states and 827 transitions. [2020-09-24 14:54:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 14:54:55,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-09-24 14:54:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:55,136 INFO L225 Difference]: With dead ends: 661 [2020-09-24 14:54:55,136 INFO L226 Difference]: Without dead ends: 450 [2020-09-24 14:54:55,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-09-24 14:54:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 354. [2020-09-24 14:54:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-09-24 14:54:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-09-24 14:54:55,155 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-09-24 14:54:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:55,155 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-09-24 14:54:55,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 14:54:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-09-24 14:54:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 14:54:55,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:55,157 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:55,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-24 14:54:55,158 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1093348544, now seen corresponding path program 6 times [2020-09-24 14:54:55,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:55,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089037456] [2020-09-24 14:54:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 14:54:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 14:54:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-24 14:54:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 6 proven. 1002 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089037456] [2020-09-24 14:54:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:55,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:54:55,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883932082] [2020-09-24 14:54:55,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:54:55,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:55,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:54:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:55,735 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 24 states. [2020-09-24 14:54:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:56,058 INFO L93 Difference]: Finished difference Result 830 states and 1002 transitions. [2020-09-24 14:54:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 14:54:56,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-09-24 14:54:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:56,061 INFO L225 Difference]: With dead ends: 830 [2020-09-24 14:54:56,061 INFO L226 Difference]: Without dead ends: 612 [2020-09-24 14:54:56,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:54:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-09-24 14:54:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 364. [2020-09-24 14:54:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-09-24 14:54:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-09-24 14:54:56,080 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-09-24 14:54:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:56,081 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-09-24 14:54:56,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:54:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-09-24 14:54:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-24 14:54:56,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:56,084 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:56,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-24 14:54:56,084 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:56,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1191231474, now seen corresponding path program 6 times [2020-09-24 14:54:56,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:56,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207290943] [2020-09-24 14:54:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-09-24 14:54:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 14:54:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-24 14:54:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 7 proven. 964 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:56,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207290943] [2020-09-24 14:54:56,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:56,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:54:56,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053377836] [2020-09-24 14:54:56,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:54:56,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:56,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:54:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:56,848 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 24 states. [2020-09-24 14:54:57,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:57,989 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2020-09-24 14:54:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 14:54:57,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-09-24 14:54:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:57,993 INFO L225 Difference]: With dead ends: 680 [2020-09-24 14:54:57,993 INFO L226 Difference]: Without dead ends: 464 [2020-09-24 14:54:57,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:54:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-09-24 14:54:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 364. [2020-09-24 14:54:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-09-24 14:54:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-09-24 14:54:58,013 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-09-24 14:54:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:58,014 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-09-24 14:54:58,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:54:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-09-24 14:54:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-24 14:54:58,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:58,016 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:58,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-24 14:54:58,016 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1719328312, now seen corresponding path program 7 times [2020-09-24 14:54:58,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:58,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750621512] [2020-09-24 14:54:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-24 14:54:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-24 14:54:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-24 14:54:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 6 proven. 1104 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:54:58,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750621512] [2020-09-24 14:54:58,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:58,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 14:54:58,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894894183] [2020-09-24 14:54:58,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 14:54:58,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 14:54:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:54:58,657 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 25 states. [2020-09-24 14:54:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:58,984 INFO L93 Difference]: Finished difference Result 857 states and 1035 transitions. [2020-09-24 14:54:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:54:58,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-09-24 14:54:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:58,988 INFO L225 Difference]: With dead ends: 857 [2020-09-24 14:54:58,989 INFO L226 Difference]: Without dead ends: 634 [2020-09-24 14:54:58,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:54:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-09-24 14:54:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 374. [2020-09-24 14:54:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-09-24 14:54:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-09-24 14:54:59,010 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-09-24 14:54:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:59,011 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-09-24 14:54:59,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 14:54:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-09-24 14:54:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-09-24 14:54:59,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:59,013 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:54:59,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-24 14:54:59,013 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:59,014 INFO L82 PathProgramCache]: Analyzing trace with hash -291058966, now seen corresponding path program 7 times [2020-09-24 14:54:59,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:59,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38928568] [2020-09-24 14:54:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:54:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:54:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-09-24 14:54:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-09-24 14:54:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-09-24 14:54:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 7 proven. 1064 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:54:59,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38928568] [2020-09-24 14:54:59,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:59,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 14:54:59,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096897631] [2020-09-24 14:54:59,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 14:54:59,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:59,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 14:54:59,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-09-24 14:54:59,943 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 25 states. [2020-09-24 14:55:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:01,233 INFO L93 Difference]: Finished difference Result 699 states and 877 transitions. [2020-09-24 14:55:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:55:01,234 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-09-24 14:55:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:01,237 INFO L225 Difference]: With dead ends: 699 [2020-09-24 14:55:01,237 INFO L226 Difference]: Without dead ends: 478 [2020-09-24 14:55:01,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-09-24 14:55:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 374. [2020-09-24 14:55:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-09-24 14:55:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-09-24 14:55:01,258 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-09-24 14:55:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:01,258 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-09-24 14:55:01,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 14:55:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-09-24 14:55:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-24 14:55:01,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:01,260 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:01,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-24 14:55:01,261 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1312616000, now seen corresponding path program 8 times [2020-09-24 14:55:01,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:01,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820124535] [2020-09-24 14:55:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-24 14:55:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-24 14:55:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-24 14:55:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 6 proven. 1211 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:55:01,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820124535] [2020-09-24 14:55:01,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:01,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 14:55:01,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178644019] [2020-09-24 14:55:01,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 14:55:01,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:01,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 14:55:01,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:01,979 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 26 states. [2020-09-24 14:55:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:02,308 INFO L93 Difference]: Finished difference Result 884 states and 1068 transitions. [2020-09-24 14:55:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 14:55:02,309 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-09-24 14:55:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:02,312 INFO L225 Difference]: With dead ends: 884 [2020-09-24 14:55:02,312 INFO L226 Difference]: Without dead ends: 656 [2020-09-24 14:55:02,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:55:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-09-24 14:55:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 384. [2020-09-24 14:55:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-09-24 14:55:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-09-24 14:55:02,334 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-09-24 14:55:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:02,335 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-09-24 14:55:02,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 14:55:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-09-24 14:55:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-24 14:55:02,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:02,337 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:02,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-24 14:55:02,337 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:02,338 INFO L82 PathProgramCache]: Analyzing trace with hash -697771278, now seen corresponding path program 8 times [2020-09-24 14:55:02,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:02,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217044181] [2020-09-24 14:55:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-09-24 14:55:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-09-24 14:55:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-09-24 14:55:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 7 proven. 1169 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:55:03,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217044181] [2020-09-24 14:55:03,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:03,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 14:55:03,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992487576] [2020-09-24 14:55:03,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 14:55:03,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 14:55:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:03,212 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 26 states. [2020-09-24 14:55:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:04,672 INFO L93 Difference]: Finished difference Result 718 states and 902 transitions. [2020-09-24 14:55:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 14:55:04,673 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-09-24 14:55:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:04,674 INFO L225 Difference]: With dead ends: 718 [2020-09-24 14:55:04,675 INFO L226 Difference]: Without dead ends: 492 [2020-09-24 14:55:04,676 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 [2020-09-24 14:55:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-09-24 14:55:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 384. [2020-09-24 14:55:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-09-24 14:55:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-09-24 14:55:04,698 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-09-24 14:55:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:04,698 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-09-24 14:55:04,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 14:55:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-09-24 14:55:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-24 14:55:04,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:04,700 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:04,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-24 14:55:04,700 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1256956728, now seen corresponding path program 9 times [2020-09-24 14:55:04,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:04,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536668723] [2020-09-24 14:55:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-24 14:55:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 14:55:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-24 14:55:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 6 proven. 1323 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:55:05,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536668723] [2020-09-24 14:55:05,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:05,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 14:55:05,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428928553] [2020-09-24 14:55:05,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 14:55:05,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 14:55:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:55:05,508 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 27 states. [2020-09-24 14:55:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:06,022 INFO L93 Difference]: Finished difference Result 911 states and 1101 transitions. [2020-09-24 14:55:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 14:55:06,022 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-09-24 14:55:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:06,025 INFO L225 Difference]: With dead ends: 911 [2020-09-24 14:55:06,026 INFO L226 Difference]: Without dead ends: 678 [2020-09-24 14:55:06,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:55:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-09-24 14:55:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 394. [2020-09-24 14:55:06,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-09-24 14:55:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-09-24 14:55:06,062 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-09-24 14:55:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:06,062 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-09-24 14:55:06,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 14:55:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-09-24 14:55:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-24 14:55:06,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:06,064 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:06,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-24 14:55:06,064 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:06,065 INFO L82 PathProgramCache]: Analyzing trace with hash -753430550, now seen corresponding path program 9 times [2020-09-24 14:55:06,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:06,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694956013] [2020-09-24 14:55:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-09-24 14:55:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-09-24 14:55:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-09-24 14:55:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 7 proven. 1279 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-24 14:55:07,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694956013] [2020-09-24 14:55:07,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:07,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 14:55:07,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909972481] [2020-09-24 14:55:07,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 14:55:07,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:07,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 14:55:07,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-09-24 14:55:07,063 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 27 states. [2020-09-24 14:55:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:08,666 INFO L93 Difference]: Finished difference Result 737 states and 927 transitions. [2020-09-24 14:55:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 14:55:08,666 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-09-24 14:55:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:08,669 INFO L225 Difference]: With dead ends: 737 [2020-09-24 14:55:08,669 INFO L226 Difference]: Without dead ends: 506 [2020-09-24 14:55:08,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:55:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-09-24 14:55:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 394. [2020-09-24 14:55:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-09-24 14:55:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-09-24 14:55:08,705 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-09-24 14:55:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:08,706 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-09-24 14:55:08,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 14:55:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-09-24 14:55:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-24 14:55:08,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:08,708 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:08,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-24 14:55:08,708 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:08,708 INFO L82 PathProgramCache]: Analyzing trace with hash -629192384, now seen corresponding path program 10 times [2020-09-24 14:55:08,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:08,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94973510] [2020-09-24 14:55:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:08,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:08,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:08,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-24 14:55:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 6 proven. 1440 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 14:55:09,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94973510] [2020-09-24 14:55:09,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:09,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 14:55:09,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843941] [2020-09-24 14:55:09,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 14:55:09,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 14:55:09,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:55:09,533 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 28 states. [2020-09-24 14:55:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:10,070 INFO L93 Difference]: Finished difference Result 938 states and 1134 transitions. [2020-09-24 14:55:10,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 14:55:10,071 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 225 [2020-09-24 14:55:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:10,075 INFO L225 Difference]: With dead ends: 938 [2020-09-24 14:55:10,075 INFO L226 Difference]: Without dead ends: 700 [2020-09-24 14:55:10,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2020-09-24 14:55:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-09-24 14:55:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 404. [2020-09-24 14:55:10,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-09-24 14:55:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 502 transitions. [2020-09-24 14:55:10,099 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 502 transitions. Word has length 225 [2020-09-24 14:55:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:10,099 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 502 transitions. [2020-09-24 14:55:10,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 14:55:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 502 transitions. [2020-09-24 14:55:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-24 14:55:10,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:10,101 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:10,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-24 14:55:10,102 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:10,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1655387634, now seen corresponding path program 10 times [2020-09-24 14:55:10,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:10,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587806376] [2020-09-24 14:55:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-24 14:55:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-09-24 14:55:10,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587806376] [2020-09-24 14:55:10,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:10,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:55:10,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592890115] [2020-09-24 14:55:10,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:55:10,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:10,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:55:10,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:55:10,511 INFO L87 Difference]: Start difference. First operand 404 states and 502 transitions. Second operand 10 states. [2020-09-24 14:55:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:10,799 INFO L93 Difference]: Finished difference Result 459 states and 581 transitions. [2020-09-24 14:55:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:55:10,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 225 [2020-09-24 14:55:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:10,804 INFO L225 Difference]: With dead ends: 459 [2020-09-24 14:55:10,804 INFO L226 Difference]: Without dead ends: 453 [2020-09-24 14:55:10,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-09-24 14:55:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-09-24 14:55:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2020-09-24 14:55:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-09-24 14:55:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2020-09-24 14:55:10,828 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 225 [2020-09-24 14:55:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:10,828 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2020-09-24 14:55:10,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 14:55:10,829 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2020-09-24 14:55:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-09-24 14:55:10,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:10,831 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:10,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-24 14:55:10,831 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash -131719239, now seen corresponding path program 1 times [2020-09-24 14:55:10,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:10,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375560750] [2020-09-24 14:55:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-24 14:55:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-09-24 14:55:11,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375560750] [2020-09-24 14:55:11,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:11,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 14:55:11,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642577200] [2020-09-24 14:55:11,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 14:55:11,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 14:55:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-24 14:55:11,233 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand 12 states. [2020-09-24 14:55:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:11,524 INFO L93 Difference]: Finished difference Result 459 states and 579 transitions. [2020-09-24 14:55:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:55:11,525 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 227 [2020-09-24 14:55:11,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:11,527 INFO L225 Difference]: With dead ends: 459 [2020-09-24 14:55:11,528 INFO L226 Difference]: Without dead ends: 452 [2020-09-24 14:55:11,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:55:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-09-24 14:55:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-09-24 14:55:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-09-24 14:55:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 549 transitions. [2020-09-24 14:55:11,551 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 549 transitions. Word has length 227 [2020-09-24 14:55:11,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:11,552 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 549 transitions. [2020-09-24 14:55:11,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 14:55:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 549 transitions. [2020-09-24 14:55:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-09-24 14:55:11,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:11,554 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:11,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-24 14:55:11,555 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1678288039, now seen corresponding path program 1 times [2020-09-24 14:55:11,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:11,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91855478] [2020-09-24 14:55:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-24 14:55:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2020-09-24 14:55:11,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91855478] [2020-09-24 14:55:11,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:55:11,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 14:55:11,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950469785] [2020-09-24 14:55:11,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 14:55:11,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 14:55:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:55:11,705 INFO L87 Difference]: Start difference. First operand 438 states and 549 transitions. Second operand 6 states. [2020-09-24 14:55:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:11,754 INFO L93 Difference]: Finished difference Result 444 states and 554 transitions. [2020-09-24 14:55:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 14:55:11,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 227 [2020-09-24 14:55:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:11,757 INFO L225 Difference]: With dead ends: 444 [2020-09-24 14:55:11,757 INFO L226 Difference]: Without dead ends: 432 [2020-09-24 14:55:11,758 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 [2020-09-24 14:55:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-09-24 14:55:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2020-09-24 14:55:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-09-24 14:55:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 541 transitions. [2020-09-24 14:55:11,781 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 541 transitions. Word has length 227 [2020-09-24 14:55:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:11,781 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 541 transitions. [2020-09-24 14:55:11,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 14:55:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 541 transitions. [2020-09-24 14:55:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-24 14:55:11,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:11,784 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:11,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-24 14:55:11,784 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:11,785 INFO L82 PathProgramCache]: Analyzing trace with hash 947853182, now seen corresponding path program 1 times [2020-09-24 14:55:11,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:11,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604106717] [2020-09-24 14:55:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 14:55:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-09-24 14:55:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-09-24 14:55:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-24 14:55:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2020-09-24 14:55:11,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604106717] [2020-09-24 14:55:11,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:11,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:55:11,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933870209] [2020-09-24 14:55:11,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:55:11,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:55:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:55:11,966 INFO L87 Difference]: Start difference. First operand 432 states and 541 transitions. Second operand 5 states. [2020-09-24 14:55:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:12,055 INFO L93 Difference]: Finished difference Result 691 states and 868 transitions. [2020-09-24 14:55:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:55:12,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2020-09-24 14:55:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:12,058 INFO L225 Difference]: With dead ends: 691 [2020-09-24 14:55:12,058 INFO L226 Difference]: Without dead ends: 280 [2020-09-24 14:55:12,059 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 [2020-09-24 14:55:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-24 14:55:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 263. [2020-09-24 14:55:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-09-24 14:55:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2020-09-24 14:55:12,073 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 230 [2020-09-24 14:55:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:12,073 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2020-09-24 14:55:12,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:55:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2020-09-24 14:55:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-24 14:55:12,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:12,076 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:12,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-24 14:55:12,076 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:12,076 INFO L82 PathProgramCache]: Analyzing trace with hash -671277925, now seen corresponding path program 1 times [2020-09-24 14:55:12,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:12,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256358833] [2020-09-24 14:55:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-09-24 14:55:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-09-24 14:55:12,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256358833] [2020-09-24 14:55:12,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:55:12,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 14:55:12,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396607861] [2020-09-24 14:55:12,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 14:55:12,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 14:55:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 14:55:12,307 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 8 states. [2020-09-24 14:55:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:12,423 INFO L93 Difference]: Finished difference Result 317 states and 389 transitions. [2020-09-24 14:55:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:55:12,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-09-24 14:55:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:12,426 INFO L225 Difference]: With dead ends: 317 [2020-09-24 14:55:12,426 INFO L226 Difference]: Without dead ends: 298 [2020-09-24 14:55:12,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:55:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-24 14:55:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 269. [2020-09-24 14:55:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-09-24 14:55:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-09-24 14:55:12,445 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 236 [2020-09-24 14:55:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:12,445 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-09-24 14:55:12,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 14:55:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-09-24 14:55:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-09-24 14:55:12,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:12,448 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:12,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-24 14:55:12,448 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:12,448 INFO L82 PathProgramCache]: Analyzing trace with hash 287100319, now seen corresponding path program 1 times [2020-09-24 14:55:12,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:12,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003831152] [2020-09-24 14:55:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-09-24 14:55:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2020-09-24 14:55:12,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003831152] [2020-09-24 14:55:12,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:12,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 14:55:12,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012790375] [2020-09-24 14:55:12,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 14:55:12,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 14:55:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:55:12,826 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 11 states. [2020-09-24 14:55:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:13,037 INFO L93 Difference]: Finished difference Result 334 states and 403 transitions. [2020-09-24 14:55:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 14:55:13,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 240 [2020-09-24 14:55:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:13,040 INFO L225 Difference]: With dead ends: 334 [2020-09-24 14:55:13,040 INFO L226 Difference]: Without dead ends: 272 [2020-09-24 14:55:13,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:55:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-24 14:55:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2020-09-24 14:55:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-09-24 14:55:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-09-24 14:55:13,061 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 240 [2020-09-24 14:55:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:13,061 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-09-24 14:55:13,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 14:55:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-09-24 14:55:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-24 14:55:13,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:13,063 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:13,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-24 14:55:13,063 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash -333217243, now seen corresponding path program 1 times [2020-09-24 14:55:13,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:13,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910404299] [2020-09-24 14:55:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-24 14:55:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2020-09-24 14:55:13,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910404299] [2020-09-24 14:55:13,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:13,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 14:55:13,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764968511] [2020-09-24 14:55:13,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 14:55:13,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 14:55:13,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 14:55:13,348 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 9 states. [2020-09-24 14:55:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:13,515 INFO L93 Difference]: Finished difference Result 331 states and 402 transitions. [2020-09-24 14:55:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 14:55:13,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 241 [2020-09-24 14:55:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:13,518 INFO L225 Difference]: With dead ends: 331 [2020-09-24 14:55:13,518 INFO L226 Difference]: Without dead ends: 319 [2020-09-24 14:55:13,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 14:55:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-09-24 14:55:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 311. [2020-09-24 14:55:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-09-24 14:55:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 382 transitions. [2020-09-24 14:55:13,553 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 382 transitions. Word has length 241 [2020-09-24 14:55:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:13,553 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 382 transitions. [2020-09-24 14:55:13,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 14:55:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 382 transitions. [2020-09-24 14:55:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-24 14:55:13,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:13,555 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:55:13,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-24 14:55:13,556 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:13,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1780452488, now seen corresponding path program 1 times [2020-09-24 14:55:13,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:13,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175871226] [2020-09-24 14:55:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-24 14:55:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 14:55:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-09-24 14:55:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 14:55:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-24 14:55:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2020-09-24 14:55:13,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175871226] [2020-09-24 14:55:13,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:13,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 14:55:13,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302944421] [2020-09-24 14:55:13,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 14:55:13,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 14:55:13,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 14:55:13,836 INFO L87 Difference]: Start difference. First operand 311 states and 382 transitions. Second operand 10 states.