/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:06:47,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:06:47,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:06:47,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:06:47,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:06:47,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:06:47,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:06:47,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:06:47,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:06:47,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:06:47,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:06:47,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:06:47,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:06:47,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:06:47,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:06:47,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:06:47,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:06:47,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:06:47,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:06:47,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:06:47,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:06:47,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:06:47,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:06:47,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:06:47,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:06:47,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:06:47,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:06:47,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:06:47,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:06:47,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:06:47,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:06:47,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:06:47,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:06:47,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:06:47,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:06:47,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:06:47,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:06:47,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:06:47,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:06:47,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:06:47,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:06:47,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:06:47,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:06:47,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:06:47,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:06:47,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:06:47,659 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:06:47,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:06:47,659 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:06:47,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:06:47,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:06:47,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:06:47,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:06:47,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:06:47,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:06:47,660 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:06:47,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:06:47,661 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:06:47,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:06:47,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:06:47,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:06:47,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:06:47,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:06:47,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:06:47,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:06:47,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:06:47,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:06:47,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:06:47,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:06:47,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:06:47,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:06:47,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 06:06:47,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:06:47,992 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:06:47,995 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:06:47,997 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:06:47,997 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:06:47,998 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-19 06:06:48,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d1f1156e/913fa491733143f98f1aa8a558903fbc/FLAGb9561c22f [2020-08-19 06:06:48,558 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:06:48,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-19 06:06:48,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d1f1156e/913fa491733143f98f1aa8a558903fbc/FLAGb9561c22f [2020-08-19 06:06:48,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d1f1156e/913fa491733143f98f1aa8a558903fbc [2020-08-19 06:06:48,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:06:48,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:06:48,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:06:48,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:06:48,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:06:48,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:06:48" (1/1) ... [2020-08-19 06:06:48,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b0c8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:48, skipping insertion in model container [2020-08-19 06:06:48,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:06:48" (1/1) ... [2020-08-19 06:06:48,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:06:48,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:06:49,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:06:49,166 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:06:49,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:06:49,208 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:06:49,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49 WrapperNode [2020-08-19 06:06:49,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:06:49,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:06:49,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:06:49,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:06:49,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... [2020-08-19 06:06:49,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... [2020-08-19 06:06:49,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... [2020-08-19 06:06:49,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... [2020-08-19 06:06:49,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... [2020-08-19 06:06:49,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... [2020-08-19 06:06:49,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... [2020-08-19 06:06:49,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:06:49,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:06:49,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:06:49,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:06:49,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:06:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:06:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:06:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:06:49,392 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-19 06:06:49,393 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-19 06:06:49,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:06:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:06:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:06:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:06:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-19 06:06:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 06:06:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-19 06:06:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 06:06:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:06:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 06:06:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 06:06:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:06:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:06:49,786 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:06:49,786 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-19 06:06:49,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:06:49 BoogieIcfgContainer [2020-08-19 06:06:49,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:06:49,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:06:49,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:06:49,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:06:49,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:06:48" (1/3) ... [2020-08-19 06:06:49,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e559914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:06:49, skipping insertion in model container [2020-08-19 06:06:49,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:06:49" (2/3) ... [2020-08-19 06:06:49,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e559914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:06:49, skipping insertion in model container [2020-08-19 06:06:49,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:06:49" (3/3) ... [2020-08-19 06:06:49,815 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-19 06:06:49,824 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:06:49,831 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:06:49,845 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:06:49,866 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:06:49,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:06:49,866 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:06:49,866 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:06:49,867 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:06:49,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:06:49,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:06:49,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:06:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-19 06:06:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 06:06:49,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:49,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:49,894 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-19 06:06:49,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:49,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776281186] [2020-08-19 06:06:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:50,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:50,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776281186] [2020-08-19 06:06:50,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:06:50,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:06:50,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538094997] [2020-08-19 06:06:50,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:06:50,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:06:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:06:50,134 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-19 06:06:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:50,450 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-19 06:06:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:06:50,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-19 06:06:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:50,465 INFO L225 Difference]: With dead ends: 150 [2020-08-19 06:06:50,465 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 06:06:50,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:06:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 06:06:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-19 06:06:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 06:06:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-19 06:06:50,531 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-19 06:06:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:50,532 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-19 06:06:50,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:06:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-19 06:06:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 06:06:50,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:50,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:50,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:06:50,535 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:50,535 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-19 06:06:50,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:50,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327847734] [2020-08-19 06:06:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:50,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:50,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327847734] [2020-08-19 06:06:50,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:50,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:06:50,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539058710] [2020-08-19 06:06:50,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:06:50,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:50,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:06:50,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:06:50,623 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-19 06:06:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:50,917 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-19 06:06:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:06:50,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-19 06:06:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:50,920 INFO L225 Difference]: With dead ends: 170 [2020-08-19 06:06:50,920 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 06:06:50,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:06:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 06:06:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-19 06:06:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 06:06:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-19 06:06:50,935 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-19 06:06:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:50,935 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-19 06:06:50,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:06:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-19 06:06:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:06:50,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:50,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:50,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:06:50,937 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-19 06:06:50,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:50,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834358001] [2020-08-19 06:06:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:51,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:51,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834358001] [2020-08-19 06:06:51,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:51,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:06:51,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043165285] [2020-08-19 06:06:51,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:06:51,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:06:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:06:51,024 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-19 06:06:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:51,311 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-19 06:06:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:06:51,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-19 06:06:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:51,319 INFO L225 Difference]: With dead ends: 203 [2020-08-19 06:06:51,319 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 06:06:51,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:06:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 06:06:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-19 06:06:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 06:06:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-19 06:06:51,343 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-19 06:06:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:51,346 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-19 06:06:51,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:06:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-19 06:06:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:06:51,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:51,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:51,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:06:51,348 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:51,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-19 06:06:51,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:51,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901774484] [2020-08-19 06:06:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:51,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:51,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901774484] [2020-08-19 06:06:51,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:51,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:06:51,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419562368] [2020-08-19 06:06:51,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:06:51,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:06:51,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:06:51,477 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-19 06:06:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:51,874 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-19 06:06:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:06:51,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-19 06:06:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:51,878 INFO L225 Difference]: With dead ends: 236 [2020-08-19 06:06:51,878 INFO L226 Difference]: Without dead ends: 188 [2020-08-19 06:06:51,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:06:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-19 06:06:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-19 06:06:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 06:06:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-19 06:06:51,891 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-19 06:06:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:51,892 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-19 06:06:51,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:06:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-19 06:06:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 06:06:51,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:51,893 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:51,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:06:51,894 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-19 06:06:51,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:51,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326472590] [2020-08-19 06:06:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 06:06:51,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326472590] [2020-08-19 06:06:51,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:06:51,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:06:51,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666150195] [2020-08-19 06:06:51,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:06:51,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:06:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:06:51,979 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-19 06:06:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:52,108 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-19 06:06:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:06:52,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-19 06:06:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:52,110 INFO L225 Difference]: With dead ends: 116 [2020-08-19 06:06:52,111 INFO L226 Difference]: Without dead ends: 67 [2020-08-19 06:06:52,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:06:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-19 06:06:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-19 06:06:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 06:06:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-19 06:06:52,119 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-19 06:06:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:52,120 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-19 06:06:52,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:06:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-19 06:06:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 06:06:52,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:52,122 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-19 06:06:52,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:06:52,122 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:52,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-19 06:06:52,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:52,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830034838] [2020-08-19 06:06:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 06:06:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:06:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:52,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830034838] [2020-08-19 06:06:52,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:52,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:06:52,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953270330] [2020-08-19 06:06:52,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:06:52,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:52,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:06:52,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:06:52,227 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-19 06:06:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:52,627 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-19 06:06:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:06:52,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-19 06:06:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:52,631 INFO L225 Difference]: With dead ends: 223 [2020-08-19 06:06:52,631 INFO L226 Difference]: Without dead ends: 173 [2020-08-19 06:06:52,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:06:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-19 06:06:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-19 06:06:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 06:06:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-19 06:06:52,642 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-19 06:06:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:52,643 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-19 06:06:52,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:06:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-19 06:06:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 06:06:52,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:52,645 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:52,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:06:52,645 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-19 06:06:52,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:52,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934564886] [2020-08-19 06:06:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:06:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:06:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:52,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934564886] [2020-08-19 06:06:52,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:52,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:06:52,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241466571] [2020-08-19 06:06:52,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:06:52,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:06:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:06:52,757 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-19 06:06:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:53,193 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-19 06:06:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:06:53,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 06:06:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:53,196 INFO L225 Difference]: With dead ends: 246 [2020-08-19 06:06:53,196 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 06:06:53,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:06:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 06:06:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-19 06:06:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 06:06:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-19 06:06:53,208 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-19 06:06:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:53,208 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-19 06:06:53,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:06:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-19 06:06:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 06:06:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:53,211 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:53,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:06:53,211 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-19 06:06:53,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:53,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651137704] [2020-08-19 06:06:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:53,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:53,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 06:06:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:53,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:06:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:53,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651137704] [2020-08-19 06:06:53,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:53,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:06:53,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94096906] [2020-08-19 06:06:53,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:06:53,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:06:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:06:53,330 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-19 06:06:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:53,859 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-19 06:06:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:06:53,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-19 06:06:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:53,862 INFO L225 Difference]: With dead ends: 269 [2020-08-19 06:06:53,862 INFO L226 Difference]: Without dead ends: 219 [2020-08-19 06:06:53,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:06:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-19 06:06:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-19 06:06:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 06:06:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-19 06:06:53,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-19 06:06:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:53,874 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-19 06:06:53,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:06:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-19 06:06:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 06:06:53,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:53,876 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:53,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:06:53,876 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-19 06:06:53,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:53,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020123080] [2020-08-19 06:06:53,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:53,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:53,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 06:06:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:53,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:06:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:54,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020123080] [2020-08-19 06:06:54,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:54,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:06:54,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208732533] [2020-08-19 06:06:54,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:06:54,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:06:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:06:54,006 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-19 06:06:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:54,569 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-19 06:06:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:06:54,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-19 06:06:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:54,573 INFO L225 Difference]: With dead ends: 292 [2020-08-19 06:06:54,574 INFO L226 Difference]: Without dead ends: 242 [2020-08-19 06:06:54,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:06:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-19 06:06:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-19 06:06:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 06:06:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-19 06:06:54,585 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-19 06:06:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:54,585 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-19 06:06:54,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:06:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-19 06:06:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 06:06:54,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:54,587 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:54,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:06:54,587 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-19 06:06:54,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:54,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062230137] [2020-08-19 06:06:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:54,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:54,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:06:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:54,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:06:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:54,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062230137] [2020-08-19 06:06:54,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:54,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:06:54,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268206470] [2020-08-19 06:06:54,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:06:54,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:54,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:06:54,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:06:54,729 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-19 06:06:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:55,353 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-19 06:06:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:06:55,354 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-19 06:06:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:55,356 INFO L225 Difference]: With dead ends: 315 [2020-08-19 06:06:55,356 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 06:06:55,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:06:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 06:06:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-19 06:06:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 06:06:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-19 06:06:55,376 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-19 06:06:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:55,376 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-19 06:06:55,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:06:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-19 06:06:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 06:06:55,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:55,380 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:55,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:06:55,382 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-19 06:06:55,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:55,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583939002] [2020-08-19 06:06:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:55,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:55,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:06:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:55,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:06:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:55,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583939002] [2020-08-19 06:06:55,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:55,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:06:55,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426896774] [2020-08-19 06:06:55,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:06:55,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:55,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:06:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:06:55,546 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-19 06:06:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:56,193 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-19 06:06:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:06:56,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-19 06:06:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:56,197 INFO L225 Difference]: With dead ends: 338 [2020-08-19 06:06:56,197 INFO L226 Difference]: Without dead ends: 288 [2020-08-19 06:06:56,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:06:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-19 06:06:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-19 06:06:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-19 06:06:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-19 06:06:56,206 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-19 06:06:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:56,206 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-19 06:06:56,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:06:56,207 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-19 06:06:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 06:06:56,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:56,208 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:56,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:06:56,208 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-19 06:06:56,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:56,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710647235] [2020-08-19 06:06:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:56,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:56,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:06:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:56,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:06:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:56,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710647235] [2020-08-19 06:06:56,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:56,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:06:56,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209463616] [2020-08-19 06:06:56,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:06:56,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:06:56,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:06:56,424 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-19 06:06:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:57,112 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-19 06:06:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 06:06:57,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-19 06:06:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:57,115 INFO L225 Difference]: With dead ends: 361 [2020-08-19 06:06:57,115 INFO L226 Difference]: Without dead ends: 311 [2020-08-19 06:06:57,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:06:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-19 06:06:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-19 06:06:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 06:06:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-19 06:06:57,133 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-19 06:06:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:57,134 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-19 06:06:57,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:06:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-19 06:06:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 06:06:57,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:57,136 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:57,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:06:57,137 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-19 06:06:57,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:57,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135214889] [2020-08-19 06:06:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:57,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:57,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:06:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:57,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:06:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:57,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135214889] [2020-08-19 06:06:57,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:57,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:06:57,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347655414] [2020-08-19 06:06:57,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:06:57,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:57,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:06:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:06:57,373 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-19 06:06:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:58,175 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-19 06:06:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:06:58,176 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-19 06:06:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:58,179 INFO L225 Difference]: With dead ends: 384 [2020-08-19 06:06:58,179 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 06:06:58,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:06:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 06:06:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-19 06:06:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 06:06:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-19 06:06:58,189 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-19 06:06:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:58,190 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-19 06:06:58,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:06:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-19 06:06:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:06:58,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:58,191 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:58,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:06:58,191 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-19 06:06:58,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:58,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964525346] [2020-08-19 06:06:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:58,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:58,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:06:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:58,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:06:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:58,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964525346] [2020-08-19 06:06:58,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:58,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:06:58,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714749448] [2020-08-19 06:06:58,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:06:58,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:06:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:06:58,403 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-19 06:06:59,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:06:59,116 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-19 06:06:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 06:06:59,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-19 06:06:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:06:59,119 INFO L225 Difference]: With dead ends: 407 [2020-08-19 06:06:59,119 INFO L226 Difference]: Without dead ends: 357 [2020-08-19 06:06:59,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:06:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-19 06:06:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-19 06:06:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 06:06:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-19 06:06:59,131 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-19 06:06:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:06:59,131 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-19 06:06:59,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:06:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-19 06:06:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 06:06:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:06:59,132 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:06:59,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:06:59,133 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:06:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:06:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-19 06:06:59,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:06:59,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141173543] [2020-08-19 06:06:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:06:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:59,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:06:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:59,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:06:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:59,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:06:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:06:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:06:59,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141173543] [2020-08-19 06:06:59,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:06:59,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 06:06:59,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522419106] [2020-08-19 06:06:59,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 06:06:59,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:06:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 06:06:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:06:59,325 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-19 06:07:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:00,194 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-19 06:07:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:07:00,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-19 06:07:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:00,198 INFO L225 Difference]: With dead ends: 430 [2020-08-19 06:07:00,198 INFO L226 Difference]: Without dead ends: 380 [2020-08-19 06:07:00,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:07:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-19 06:07:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-19 06:07:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 06:07:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-19 06:07:00,208 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-19 06:07:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:00,209 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-19 06:07:00,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 06:07:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-19 06:07:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 06:07:00,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:00,210 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:00,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:07:00,210 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:00,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-19 06:07:00,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:00,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507430861] [2020-08-19 06:07:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:00,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:00,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:07:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:00,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:07:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:00,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507430861] [2020-08-19 06:07:00,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:00,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 06:07:00,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623200768] [2020-08-19 06:07:00,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 06:07:00,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:00,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 06:07:00,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:07:00,430 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-19 06:07:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:01,396 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-19 06:07:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 06:07:01,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-19 06:07:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:01,399 INFO L225 Difference]: With dead ends: 453 [2020-08-19 06:07:01,399 INFO L226 Difference]: Without dead ends: 403 [2020-08-19 06:07:01,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:07:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-19 06:07:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-19 06:07:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 06:07:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-19 06:07:01,409 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-19 06:07:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:01,410 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-19 06:07:01,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 06:07:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-19 06:07:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 06:07:01,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:01,411 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:01,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:07:01,411 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:01,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-19 06:07:01,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:01,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103235683] [2020-08-19 06:07:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:01,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:01,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:07:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:01,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:07:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:01,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103235683] [2020-08-19 06:07:01,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:01,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 06:07:01,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96749392] [2020-08-19 06:07:01,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 06:07:01,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 06:07:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:07:01,645 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-19 06:07:02,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:02,570 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-19 06:07:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:07:02,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-19 06:07:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:02,576 INFO L225 Difference]: With dead ends: 476 [2020-08-19 06:07:02,576 INFO L226 Difference]: Without dead ends: 426 [2020-08-19 06:07:02,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:07:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-19 06:07:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-19 06:07:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 06:07:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-19 06:07:02,590 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-19 06:07:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:02,591 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-19 06:07:02,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 06:07:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-19 06:07:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 06:07:02,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:02,592 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:02,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:07:02,592 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-19 06:07:02,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:02,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197641844] [2020-08-19 06:07:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:02,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:07:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:02,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:07:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:02,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197641844] [2020-08-19 06:07:02,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:02,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 06:07:02,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427152429] [2020-08-19 06:07:02,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 06:07:02,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 06:07:02,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:07:02,848 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-19 06:07:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:04,004 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-19 06:07:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 06:07:04,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-19 06:07:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:04,011 INFO L225 Difference]: With dead ends: 499 [2020-08-19 06:07:04,011 INFO L226 Difference]: Without dead ends: 449 [2020-08-19 06:07:04,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:07:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-19 06:07:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-19 06:07:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 06:07:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-19 06:07:04,022 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-19 06:07:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:04,022 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-19 06:07:04,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 06:07:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-19 06:07:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 06:07:04,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:04,024 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:04,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:07:04,024 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-19 06:07:04,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:04,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197307172] [2020-08-19 06:07:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:04,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:04,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:07:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:04,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:07:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:04,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197307172] [2020-08-19 06:07:04,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:04,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 06:07:04,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313538487] [2020-08-19 06:07:04,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 06:07:04,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 06:07:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:07:04,334 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-19 06:07:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:05,628 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-19 06:07:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:07:05,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-19 06:07:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:05,632 INFO L225 Difference]: With dead ends: 522 [2020-08-19 06:07:05,633 INFO L226 Difference]: Without dead ends: 472 [2020-08-19 06:07:05,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:07:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-19 06:07:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-19 06:07:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-19 06:07:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-19 06:07:05,647 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-19 06:07:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:05,648 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-19 06:07:05,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 06:07:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-19 06:07:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 06:07:05,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:05,649 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:05,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:07:05,650 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-19 06:07:05,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:05,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680736072] [2020-08-19 06:07:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:05,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:05,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:07:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:05,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:07:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680736072] [2020-08-19 06:07:05,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:05,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 06:07:05,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586359461] [2020-08-19 06:07:05,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 06:07:05,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:05,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 06:07:05,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:07:05,975 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-19 06:07:07,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:07,379 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-19 06:07:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 06:07:07,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-19 06:07:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:07,384 INFO L225 Difference]: With dead ends: 545 [2020-08-19 06:07:07,384 INFO L226 Difference]: Without dead ends: 495 [2020-08-19 06:07:07,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:07:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-19 06:07:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-19 06:07:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 06:07:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-19 06:07:07,405 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-19 06:07:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:07,405 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-19 06:07:07,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 06:07:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-19 06:07:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 06:07:07,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:07,407 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:07,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:07:07,407 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:07,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-19 06:07:07,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:07,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457606366] [2020-08-19 06:07:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:07,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:07,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:07:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:07,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:07:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:07,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457606366] [2020-08-19 06:07:07,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:07,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 06:07:07,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839127743] [2020-08-19 06:07:07,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 06:07:07,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 06:07:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:07:07,768 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-19 06:07:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:08,986 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-19 06:07:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 06:07:08,987 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-19 06:07:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:08,990 INFO L225 Difference]: With dead ends: 568 [2020-08-19 06:07:08,990 INFO L226 Difference]: Without dead ends: 518 [2020-08-19 06:07:08,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:07:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-19 06:07:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-19 06:07:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-19 06:07:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-19 06:07:09,001 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-19 06:07:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:09,001 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-19 06:07:09,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 06:07:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-19 06:07:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 06:07:09,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:09,003 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:09,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:07:09,003 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-19 06:07:09,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:09,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766522682] [2020-08-19 06:07:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:09,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:07:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:09,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:07:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:09,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766522682] [2020-08-19 06:07:09,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:09,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 06:07:09,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218822939] [2020-08-19 06:07:09,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 06:07:09,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:09,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 06:07:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:07:09,360 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-19 06:07:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:10,574 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-19 06:07:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 06:07:10,576 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-19 06:07:10,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:10,579 INFO L225 Difference]: With dead ends: 591 [2020-08-19 06:07:10,579 INFO L226 Difference]: Without dead ends: 541 [2020-08-19 06:07:10,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:07:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-19 06:07:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-19 06:07:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-19 06:07:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-19 06:07:10,590 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-19 06:07:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:10,591 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-19 06:07:10,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 06:07:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-19 06:07:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 06:07:10,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:10,592 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:10,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:07:10,592 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-19 06:07:10,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:10,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752657800] [2020-08-19 06:07:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:10,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:10,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:07:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:10,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:07:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:10,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752657800] [2020-08-19 06:07:10,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:10,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 06:07:10,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624070390] [2020-08-19 06:07:10,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 06:07:10,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:10,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 06:07:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:07:10,960 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-19 06:07:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:12,357 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-19 06:07:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 06:07:12,357 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-19 06:07:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:12,361 INFO L225 Difference]: With dead ends: 614 [2020-08-19 06:07:12,361 INFO L226 Difference]: Without dead ends: 564 [2020-08-19 06:07:12,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-19 06:07:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-19 06:07:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-19 06:07:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 06:07:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-19 06:07:12,372 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-19 06:07:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:12,372 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-19 06:07:12,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 06:07:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-19 06:07:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 06:07:12,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:12,374 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:12,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:07:12,374 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:12,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-19 06:07:12,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:12,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750075385] [2020-08-19 06:07:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:12,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:12,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:07:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:12,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:07:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:12,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750075385] [2020-08-19 06:07:12,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:12,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 06:07:12,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168508791] [2020-08-19 06:07:12,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 06:07:12,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 06:07:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:07:12,784 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-19 06:07:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:14,698 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-19 06:07:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 06:07:14,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-19 06:07:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:14,704 INFO L225 Difference]: With dead ends: 637 [2020-08-19 06:07:14,704 INFO L226 Difference]: Without dead ends: 587 [2020-08-19 06:07:14,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-19 06:07:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-19 06:07:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-19 06:07:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 06:07:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-19 06:07:14,726 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-19 06:07:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:14,727 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-19 06:07:14,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 06:07:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-19 06:07:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 06:07:14,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:14,729 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:14,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 06:07:14,729 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-19 06:07:14,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:14,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971524922] [2020-08-19 06:07:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:15,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:07:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:15,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:07:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:15,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971524922] [2020-08-19 06:07:15,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:15,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 06:07:15,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467736853] [2020-08-19 06:07:15,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 06:07:15,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 06:07:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-19 06:07:15,365 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-19 06:07:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:17,894 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-19 06:07:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 06:07:17,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-19 06:07:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:17,899 INFO L225 Difference]: With dead ends: 660 [2020-08-19 06:07:17,899 INFO L226 Difference]: Without dead ends: 610 [2020-08-19 06:07:17,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-19 06:07:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-19 06:07:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-19 06:07:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-19 06:07:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-19 06:07:17,917 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-19 06:07:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:17,917 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-19 06:07:17,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 06:07:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-19 06:07:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 06:07:17,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:17,919 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:17,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 06:07:17,920 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-19 06:07:17,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:17,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821209248] [2020-08-19 06:07:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:18,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:18,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:07:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:18,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:07:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:18,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821209248] [2020-08-19 06:07:18,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:18,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 06:07:18,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902588125] [2020-08-19 06:07:18,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 06:07:18,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:18,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 06:07:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-19 06:07:18,335 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-19 06:07:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:20,021 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-19 06:07:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-19 06:07:20,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-19 06:07:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:20,025 INFO L225 Difference]: With dead ends: 683 [2020-08-19 06:07:20,026 INFO L226 Difference]: Without dead ends: 633 [2020-08-19 06:07:20,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-19 06:07:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-19 06:07:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-19 06:07:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 06:07:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-19 06:07:20,036 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-19 06:07:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:20,036 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-19 06:07:20,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 06:07:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-19 06:07:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 06:07:20,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:20,037 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:20,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 06:07:20,038 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-19 06:07:20,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:20,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406323199] [2020-08-19 06:07:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:20,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:07:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:20,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:07:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:20,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406323199] [2020-08-19 06:07:20,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:20,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 06:07:20,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403587930] [2020-08-19 06:07:20,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 06:07:20,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:20,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 06:07:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-19 06:07:20,532 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-19 06:07:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:22,576 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-19 06:07:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 06:07:22,576 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-19 06:07:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:22,580 INFO L225 Difference]: With dead ends: 706 [2020-08-19 06:07:22,580 INFO L226 Difference]: Without dead ends: 656 [2020-08-19 06:07:22,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-19 06:07:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-19 06:07:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-19 06:07:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-19 06:07:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-19 06:07:22,591 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-19 06:07:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:22,591 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-19 06:07:22,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 06:07:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-19 06:07:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 06:07:22,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:22,593 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:22,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 06:07:22,593 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-19 06:07:22,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:22,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353736484] [2020-08-19 06:07:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:23,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:23,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:07:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:23,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:07:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:23,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353736484] [2020-08-19 06:07:23,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:23,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 06:07:23,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520012049] [2020-08-19 06:07:23,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 06:07:23,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:23,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 06:07:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-19 06:07:23,108 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-19 06:07:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:25,247 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-19 06:07:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 06:07:25,248 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-19 06:07:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:25,250 INFO L225 Difference]: With dead ends: 729 [2020-08-19 06:07:25,251 INFO L226 Difference]: Without dead ends: 679 [2020-08-19 06:07:25,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 06:07:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-19 06:07:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-19 06:07:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-19 06:07:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-19 06:07:25,261 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-19 06:07:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:25,261 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-19 06:07:25,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 06:07:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-19 06:07:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 06:07:25,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:25,262 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:25,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 06:07:25,263 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-19 06:07:25,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:25,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550592466] [2020-08-19 06:07:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:25,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:25,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:07:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:07:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:07:25,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550592466] [2020-08-19 06:07:25,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:25,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 06:07:25,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072797844] [2020-08-19 06:07:25,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 06:07:25,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 06:07:25,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-19 06:07:25,845 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-19 06:07:27,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:27,688 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-19 06:07:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 06:07:27,688 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-19 06:07:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:27,691 INFO L225 Difference]: With dead ends: 752 [2020-08-19 06:07:27,691 INFO L226 Difference]: Without dead ends: 702 [2020-08-19 06:07:27,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 06:07:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-19 06:07:27,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-19 06:07:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 06:07:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-19 06:07:27,703 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-19 06:07:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:27,703 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-19 06:07:27,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 06:07:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-19 06:07:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 06:07:27,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:27,705 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:27,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 06:07:27,705 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-19 06:07:27,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:27,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167332712] [2020-08-19 06:07:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:27,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:27,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:07:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:27,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:07:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-19 06:07:27,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167332712] [2020-08-19 06:07:27,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:07:27,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:07:27,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194901099] [2020-08-19 06:07:27,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:07:27,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:27,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:07:27,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:07:27,797 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-19 06:07:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:27,920 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-19 06:07:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:07:27,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-19 06:07:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:27,923 INFO L225 Difference]: With dead ends: 177 [2020-08-19 06:07:27,923 INFO L226 Difference]: Without dead ends: 132 [2020-08-19 06:07:27,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:07:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-19 06:07:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-19 06:07:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 06:07:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-19 06:07:27,930 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-19 06:07:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:27,930 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-19 06:07:27,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:07:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-19 06:07:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 06:07:27,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:27,931 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:07:27,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 06:07:27,932 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-19 06:07:27,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:27,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421997596] [2020-08-19 06:07:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:27,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:27,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:07:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:07:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-19 06:07:28,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421997596] [2020-08-19 06:07:28,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:07:28,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:07:28,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509947755] [2020-08-19 06:07:28,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:07:28,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:07:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:07:28,012 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-19 06:07:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:28,197 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-19 06:07:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:07:28,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-19 06:07:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:28,199 INFO L225 Difference]: With dead ends: 200 [2020-08-19 06:07:28,200 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 06:07:28,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:07:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 06:07:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-19 06:07:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 06:07:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-19 06:07:28,205 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-19 06:07:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:28,206 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-19 06:07:28,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:07:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-19 06:07:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 06:07:28,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:28,207 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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] [2020-08-19 06:07:28,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 06:07:28,207 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:28,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-19 06:07:28,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:28,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653566878] [2020-08-19 06:07:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:07:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:07:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-19 06:07:28,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653566878] [2020-08-19 06:07:28,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:07:28,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:07:28,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570075373] [2020-08-19 06:07:28,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:07:28,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:28,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:07:28,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:07:28,295 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-19 06:07:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:28,441 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-19 06:07:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:07:28,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-19 06:07:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:28,443 INFO L225 Difference]: With dead ends: 187 [2020-08-19 06:07:28,443 INFO L226 Difference]: Without dead ends: 139 [2020-08-19 06:07:28,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:07:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-19 06:07:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-19 06:07:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 06:07:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-19 06:07:28,453 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-19 06:07:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:28,454 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-19 06:07:28,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:07:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-19 06:07:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 06:07:28,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:07:28,455 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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] [2020-08-19 06:07:28,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 06:07:28,455 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:07:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:07:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-19 06:07:28,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:07:28,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135148935] [2020-08-19 06:07:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:07:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:07:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:07:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:07:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:07:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-19 06:07:28,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135148935] [2020-08-19 06:07:28,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:07:28,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:07:28,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783576372] [2020-08-19 06:07:28,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:07:28,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:07:28,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:07:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:07:28,595 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-19 06:07:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:07:28,742 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-19 06:07:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:07:28,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-19 06:07:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:07:28,747 INFO L225 Difference]: With dead ends: 157 [2020-08-19 06:07:28,747 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:07:28,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:07:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:07:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:07:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:07:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:07:28,750 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-19 06:07:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:07:28,750 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:07:28,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:07:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:07:28,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:07:28,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 06:07:28,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:07:28,957 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-19 06:07:28,957 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-19 06:07:28,957 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-19 06:07:28,957 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-19 06:07:28,957 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-19 06:07:28,958 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-19 06:07:28,958 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-19 06:07:28,958 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:07:28,958 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-19 06:07:28,958 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:07:28,958 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-19 06:07:28,958 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-19 06:07:28,960 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-19 06:07:28,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:07:28,960 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:07:28,960 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:07:28,960 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:07:28,960 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-19 06:07:28,961 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-19 06:07:28,961 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-19 06:07:28,961 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-19 06:07:28,961 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 06:07:28,961 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-19 06:07:28,961 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 06:07:28,961 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-19 06:07:28,961 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-19 06:07:28,963 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 06:07:28,964 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-19 06:07:28,964 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-19 06:07:28,964 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-19 06:07:28,964 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-19 06:07:28,964 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-19 06:07:28,964 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-19 06:07:28,965 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-19 06:07:28,965 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-19 06:07:28,965 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-19 06:07:28,965 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-19 06:07:28,965 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-19 06:07:28,965 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-19 06:07:28,965 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-19 06:07:28,965 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-19 06:07:28,966 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-19 06:07:28,967 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 06:07:28,967 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-19 06:07:28,967 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 06:07:28,967 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-19 06:07:28,967 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-19 06:07:28,967 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-19 06:07:28,967 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-19 06:07:28,967 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 06:07:28,967 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-19 06:07:28,968 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-19 06:07:28,968 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-19 06:07:28,968 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-19 06:07:28,968 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-19 06:07:28,968 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-19 06:07:28,968 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-19 06:07:28,969 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-19 06:07:28,969 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-19 06:07:28,969 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-19 06:07:28,969 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-19 06:07:28,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:07:28 BoogieIcfgContainer [2020-08-19 06:07:28,993 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:07:28,995 INFO L168 Benchmark]: Toolchain (without parser) took 40051.21 ms. Allocated memory was 140.0 MB in the beginning and 491.8 MB in the end (delta: 351.8 MB). Free memory was 102.9 MB in the beginning and 412.0 MB in the end (delta: -309.2 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:28,996 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:07:28,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.92 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 91.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:28,997 INFO L168 Benchmark]: Boogie Preprocessor took 117.27 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:28,998 INFO L168 Benchmark]: RCFGBuilder took 470.36 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 155.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:28,998 INFO L168 Benchmark]: TraceAbstraction took 39194.06 ms. Allocated memory was 201.9 MB in the beginning and 491.8 MB in the end (delta: 289.9 MB). Free memory was 154.5 MB in the beginning and 412.0 MB in the end (delta: -257.6 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:07:29,001 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.92 ms. Allocated memory is still 140.0 MB. Free memory was 102.7 MB in the beginning and 91.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.27 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 470.36 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 155.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39194.06 ms. Allocated memory was 201.9 MB in the beginning and 491.8 MB in the end (delta: 289.9 MB). Free memory was 154.5 MB in the beginning and 412.0 MB in the end (delta: -257.6 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38.8s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...