/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:29:45,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:29:45,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:29:45,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:29:45,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:29:45,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:29:45,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:29:45,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:29:45,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:29:45,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:29:45,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:29:45,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:29:45,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:29:45,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:29:45,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:29:45,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:29:45,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:29:45,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:29:45,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:29:45,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:29:45,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:29:45,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:29:45,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:29:45,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:29:45,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:29:45,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:29:45,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:29:45,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:29:45,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:29:45,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 04:29:45,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 04:29:45,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 04:29:45,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 04:29:45,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 04:29:45,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 04:29:45,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 04:29:45,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 04:29:45,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 04:29:45,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:29:45,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:29:45,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:29:45,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 04:29:45,874 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:29:45,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:29:45,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:29:45,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:29:45,877 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:29:45,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:29:45,878 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:29:45,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:29:45,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:29:45,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:29:45,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:29:45,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:29:45,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:29:45,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:29:45,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:29:45,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:29:45,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:29:45,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:29:45,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:29:45,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:29:45,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:29:45,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:29:45,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:29:45,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:29:45,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:29:45,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:29:45,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:29:45,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:29:45,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:29:45,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:29:46,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:29:46,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:29:46,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:29:46,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:29:46,222 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:29:46,223 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-19 04:29:46,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23224a370/bc9ca1bb1a5f4673b3e5068a307385da/FLAG4fb849044 [2020-08-19 04:29:46,676 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:29:46,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-19 04:29:46,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23224a370/bc9ca1bb1a5f4673b3e5068a307385da/FLAG4fb849044 [2020-08-19 04:29:47,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23224a370/bc9ca1bb1a5f4673b3e5068a307385da [2020-08-19 04:29:47,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:29:47,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:29:47,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:29:47,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:29:47,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:29:47,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396e528d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47, skipping insertion in model container [2020-08-19 04:29:47,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:29:47,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:29:47,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:29:47,345 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:29:47,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:29:47,484 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:29:47,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47 WrapperNode [2020-08-19 04:29:47,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:29:47,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:29:47,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:29:47,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:29:47,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... [2020-08-19 04:29:47,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:29:47,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:29:47,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:29:47,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:29:47,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:29:47,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:29:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:29:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 04:29:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-19 04:29:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-19 04:29:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:29:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:29:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 04:29:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:29:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-19 04:29:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 04:29:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-19 04:29:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 04:29:47,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:29:47,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 04:29:47,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 04:29:47,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:29:47,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:29:48,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:29:48,034 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-19 04:29:48,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:29:48 BoogieIcfgContainer [2020-08-19 04:29:48,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:29:48,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:29:48,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:29:48,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:29:48,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:29:47" (1/3) ... [2020-08-19 04:29:48,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1786240c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:29:48, skipping insertion in model container [2020-08-19 04:29:48,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:47" (2/3) ... [2020-08-19 04:29:48,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1786240c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:29:48, skipping insertion in model container [2020-08-19 04:29:48,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:29:48" (3/3) ... [2020-08-19 04:29:48,048 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-19 04:29:48,057 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:29:48,065 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:29:48,078 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:29:48,099 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:29:48,100 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:29:48,100 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:29:48,100 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:29:48,100 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:29:48,101 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:29:48,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:29:48,101 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:29:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-19 04:29:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 04:29:48,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:48,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:48,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-19 04:29:48,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:48,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509398733] [2020-08-19 04:29:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:48,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:48,337 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 04:29:48,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509398733] [2020-08-19 04:29:48,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:48,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 04:29:48,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658896060] [2020-08-19 04:29:48,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:29:48,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:48,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:29:48,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:29:48,367 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-19 04:29:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:48,685 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-19 04:29:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:29:48,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-19 04:29:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:48,699 INFO L225 Difference]: With dead ends: 150 [2020-08-19 04:29:48,699 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 04:29:48,704 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 04:29:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 04:29:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-19 04:29:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 04:29:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-19 04:29:48,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-19 04:29:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:48,760 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-19 04:29:48,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:29:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-19 04:29:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 04:29:48,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:48,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:48,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:29:48,762 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-19 04:29:48,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:48,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832785190] [2020-08-19 04:29:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:48,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:48,850 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 04:29:48,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832785190] [2020-08-19 04:29:48,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:48,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 04:29:48,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655314672] [2020-08-19 04:29:48,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:29:48,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:48,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:29:48,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:29:48,854 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-19 04:29:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:49,175 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-19 04:29:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:29:49,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-19 04:29:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:49,179 INFO L225 Difference]: With dead ends: 170 [2020-08-19 04:29:49,179 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 04:29:49,180 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 04:29:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 04:29:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-19 04:29:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 04:29:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-19 04:29:49,194 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-19 04:29:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:49,194 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-19 04:29:49,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:29:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-19 04:29:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 04:29:49,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:49,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:49,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:29:49,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-19 04:29:49,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:49,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076764808] [2020-08-19 04:29:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:49,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:49,289 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 04:29:49,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076764808] [2020-08-19 04:29:49,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:49,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:29:49,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574223772] [2020-08-19 04:29:49,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:29:49,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:49,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:29:49,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:29:49,292 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-19 04:29:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:49,590 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-19 04:29:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:29:49,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-19 04:29:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:49,594 INFO L225 Difference]: With dead ends: 203 [2020-08-19 04:29:49,598 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 04:29:49,599 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 04:29:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 04:29:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-19 04:29:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 04:29:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-19 04:29:49,631 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-19 04:29:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:49,635 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-19 04:29:49,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:29:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-19 04:29:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:29:49,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:49,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:49,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:29:49,638 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-19 04:29:49,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:49,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302283438] [2020-08-19 04:29:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:49,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:49,740 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 04:29:49,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302283438] [2020-08-19 04:29:49,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:49,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 04:29:49,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072672671] [2020-08-19 04:29:49,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:29:49,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:29:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:29:49,743 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-19 04:29:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:50,167 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-19 04:29:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:29:50,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-19 04:29:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:50,170 INFO L225 Difference]: With dead ends: 236 [2020-08-19 04:29:50,170 INFO L226 Difference]: Without dead ends: 188 [2020-08-19 04:29:50,171 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 04:29:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-19 04:29:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-19 04:29:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 04:29:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-19 04:29:50,193 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-19 04:29:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:50,198 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-19 04:29:50,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:29:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-19 04:29:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:29:50,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:50,200 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:29:50,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:29:50,200 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-19 04:29:50,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:50,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201344695] [2020-08-19 04:29:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:50,309 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 04:29:50,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201344695] [2020-08-19 04:29:50,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:50,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:29:50,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723888242] [2020-08-19 04:29:50,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:29:50,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:50,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:29:50,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:29:50,312 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-19 04:29:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:50,422 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-19 04:29:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:29:50,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-19 04:29:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:50,423 INFO L225 Difference]: With dead ends: 116 [2020-08-19 04:29:50,423 INFO L226 Difference]: Without dead ends: 67 [2020-08-19 04:29:50,424 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 04:29:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-19 04:29:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-19 04:29:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 04:29:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-19 04:29:50,432 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-19 04:29:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:50,432 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-19 04:29:50,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:29:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-19 04:29:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 04:29:50,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:50,434 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 04:29:50,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:29:50,435 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-19 04:29:50,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:50,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938442823] [2020-08-19 04:29:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:50,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 04:29:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:50,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:29:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:50,580 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 04:29:50,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938442823] [2020-08-19 04:29:50,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:50,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 04:29:50,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284401165] [2020-08-19 04:29:50,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 04:29:50,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:50,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 04:29:50,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 04:29:50,584 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-19 04:29:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:51,022 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-19 04:29:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 04:29:51,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-19 04:29:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:51,025 INFO L225 Difference]: With dead ends: 223 [2020-08-19 04:29:51,025 INFO L226 Difference]: Without dead ends: 173 [2020-08-19 04:29:51,026 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 04:29:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-19 04:29:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-19 04:29:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 04:29:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-19 04:29:51,039 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-19 04:29:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:51,040 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-19 04:29:51,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 04:29:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-19 04:29:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 04:29:51,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:51,043 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 04:29:51,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:29:51,043 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-19 04:29:51,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:51,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710515609] [2020-08-19 04:29:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 04:29:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 04:29:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,195 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 04:29:51,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710515609] [2020-08-19 04:29:51,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:51,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 04:29:51,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655263564] [2020-08-19 04:29:51,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 04:29:51,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:51,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 04:29:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 04:29:51,198 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-19 04:29:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:51,666 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-19 04:29:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 04:29:51,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 04:29:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:51,670 INFO L225 Difference]: With dead ends: 246 [2020-08-19 04:29:51,670 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 04:29:51,672 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 04:29:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 04:29:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-19 04:29:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 04:29:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-19 04:29:51,683 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-19 04:29:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:51,683 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-19 04:29:51,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 04:29:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-19 04:29:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 04:29:51,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:51,685 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 04:29:51,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:29:51,685 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-19 04:29:51,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:51,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210910273] [2020-08-19 04:29:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 04:29:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 04:29:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,817 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 04:29:51,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210910273] [2020-08-19 04:29:51,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:51,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 04:29:51,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545973504] [2020-08-19 04:29:51,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 04:29:51,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:51,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 04:29:51,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 04:29:51,819 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-19 04:29:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:52,339 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-19 04:29:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 04:29:52,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-19 04:29:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:52,341 INFO L225 Difference]: With dead ends: 269 [2020-08-19 04:29:52,343 INFO L226 Difference]: Without dead ends: 219 [2020-08-19 04:29:52,344 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 04:29:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-19 04:29:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-19 04:29:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 04:29:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-19 04:29:52,372 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-19 04:29:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:52,373 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-19 04:29:52,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 04:29:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-19 04:29:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 04:29:52,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:52,377 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 04:29:52,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:29:52,377 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-19 04:29:52,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:52,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671486749] [2020-08-19 04:29:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 04:29:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 04:29:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,550 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 04:29:52,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671486749] [2020-08-19 04:29:52,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:52,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 04:29:52,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206285104] [2020-08-19 04:29:52,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 04:29:52,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 04:29:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 04:29:52,553 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-19 04:29:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:53,101 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-19 04:29:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 04:29:53,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-19 04:29:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:53,105 INFO L225 Difference]: With dead ends: 292 [2020-08-19 04:29:53,105 INFO L226 Difference]: Without dead ends: 242 [2020-08-19 04:29:53,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:29:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-19 04:29:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-19 04:29:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 04:29:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-19 04:29:53,119 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-19 04:29:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:53,120 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-19 04:29:53,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 04:29:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-19 04:29:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 04:29:53,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:53,122 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 04:29:53,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:29:53,122 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-19 04:29:53,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:53,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433776001] [2020-08-19 04:29:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 04:29:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:29:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,282 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 04:29:53,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433776001] [2020-08-19 04:29:53,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:53,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 04:29:53,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975977269] [2020-08-19 04:29:53,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 04:29:53,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:53,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 04:29:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 04:29:53,285 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-19 04:29:53,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:53,886 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-19 04:29:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 04:29:53,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-19 04:29:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:53,889 INFO L225 Difference]: With dead ends: 315 [2020-08-19 04:29:53,889 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 04:29:53,890 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 04:29:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 04:29:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-19 04:29:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 04:29:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-19 04:29:53,899 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-19 04:29:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:53,899 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-19 04:29:53,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 04:29:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-19 04:29:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 04:29:53,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:53,901 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 04:29:53,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:29:53,901 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:53,902 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-19 04:29:53,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:53,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326362687] [2020-08-19 04:29:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 04:29:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 04:29:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,031 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 04:29:54,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326362687] [2020-08-19 04:29:54,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:54,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 04:29:54,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440094978] [2020-08-19 04:29:54,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 04:29:54,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:54,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 04:29:54,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 04:29:54,034 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-19 04:29:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:54,682 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-19 04:29:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 04:29:54,682 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-19 04:29:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:54,685 INFO L225 Difference]: With dead ends: 338 [2020-08-19 04:29:54,686 INFO L226 Difference]: Without dead ends: 288 [2020-08-19 04:29:54,686 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 04:29:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-19 04:29:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-19 04:29:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-19 04:29:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-19 04:29:54,695 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-19 04:29:54,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:54,696 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-19 04:29:54,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 04:29:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-19 04:29:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 04:29:54,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:54,697 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 04:29:54,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:29:54,698 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:54,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:54,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-19 04:29:54,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:54,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010106874] [2020-08-19 04:29:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 04:29:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 04:29:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:54,860 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 04:29:54,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010106874] [2020-08-19 04:29:54,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:54,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 04:29:54,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091404823] [2020-08-19 04:29:54,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 04:29:54,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 04:29:54,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 04:29:54,862 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-19 04:29:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:55,577 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-19 04:29:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 04:29:55,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-19 04:29:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:55,580 INFO L225 Difference]: With dead ends: 361 [2020-08-19 04:29:55,580 INFO L226 Difference]: Without dead ends: 311 [2020-08-19 04:29:55,581 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 04:29:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-19 04:29:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-19 04:29:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 04:29:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-19 04:29:55,591 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-19 04:29:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:55,594 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-19 04:29:55,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 04:29:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-19 04:29:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 04:29:55,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:55,596 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 04:29:55,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:29:55,596 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-19 04:29:55,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:55,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209065054] [2020-08-19 04:29:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 04:29:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 04:29:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:55,852 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 04:29:55,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209065054] [2020-08-19 04:29:55,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:55,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 04:29:55,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200167171] [2020-08-19 04:29:55,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 04:29:55,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 04:29:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 04:29:55,855 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-19 04:29:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:56,626 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-19 04:29:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 04:29:56,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-19 04:29:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:56,641 INFO L225 Difference]: With dead ends: 384 [2020-08-19 04:29:56,641 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 04:29:56,642 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 04:29:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 04:29:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-19 04:29:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 04:29:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-19 04:29:56,650 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-19 04:29:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:56,651 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-19 04:29:56,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 04:29:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-19 04:29:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 04:29:56,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:56,652 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 04:29:56,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:29:56,652 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:56,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-19 04:29:56,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:56,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697237838] [2020-08-19 04:29:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 04:29:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 04:29:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:56,831 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 04:29:56,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697237838] [2020-08-19 04:29:56,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:56,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 04:29:56,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835973195] [2020-08-19 04:29:56,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 04:29:56,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:56,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 04:29:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 04:29:56,834 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-19 04:29:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:57,560 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-19 04:29:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 04:29:57,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-19 04:29:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:57,563 INFO L225 Difference]: With dead ends: 407 [2020-08-19 04:29:57,563 INFO L226 Difference]: Without dead ends: 357 [2020-08-19 04:29:57,564 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 04:29:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-19 04:29:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-19 04:29:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 04:29:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-19 04:29:57,573 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-19 04:29:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:57,573 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-19 04:29:57,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 04:29:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-19 04:29:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 04:29:57,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:57,574 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 04:29:57,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:29:57,575 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-19 04:29:57,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:57,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368975524] [2020-08-19 04:29:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 04:29:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 04:29:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:57,779 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 04:29:57,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368975524] [2020-08-19 04:29:57,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:57,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 04:29:57,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176161479] [2020-08-19 04:29:57,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 04:29:57,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:57,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 04:29:57,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 04:29:57,782 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-19 04:29:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:58,794 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-19 04:29:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 04:29:58,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-19 04:29:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:58,798 INFO L225 Difference]: With dead ends: 430 [2020-08-19 04:29:58,799 INFO L226 Difference]: Without dead ends: 380 [2020-08-19 04:29:58,800 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 04:29:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-19 04:29:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-19 04:29:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 04:29:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-19 04:29:58,811 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-19 04:29:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:58,812 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-19 04:29:58,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 04:29:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-19 04:29:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 04:29:58,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:58,813 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 04:29:58,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:29:58,814 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-19 04:29:58,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:58,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498867946] [2020-08-19 04:29:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:58,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:58,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 04:29:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:59,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:29:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:59,016 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 04:29:59,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498867946] [2020-08-19 04:29:59,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:59,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 04:29:59,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623693581] [2020-08-19 04:29:59,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 04:29:59,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 04:29:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 04:29:59,019 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-19 04:30:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:00,035 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-19 04:30:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 04:30:00,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-19 04:30:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:00,039 INFO L225 Difference]: With dead ends: 453 [2020-08-19 04:30:00,039 INFO L226 Difference]: Without dead ends: 403 [2020-08-19 04:30:00,040 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 04:30:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-19 04:30:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-19 04:30:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 04:30:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-19 04:30:00,057 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-19 04:30:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:00,060 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-19 04:30:00,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 04:30:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-19 04:30:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 04:30:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:00,061 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 04:30:00,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:30:00,062 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-19 04:30:00,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:00,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080555323] [2020-08-19 04:30:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:00,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:00,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 04:30:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:00,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 04:30:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:00,300 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 04:30:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080555323] [2020-08-19 04:30:00,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:00,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 04:30:00,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847153852] [2020-08-19 04:30:00,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 04:30:00,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 04:30:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-19 04:30:00,303 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-19 04:30:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:01,273 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-19 04:30:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 04:30:01,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-19 04:30:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:01,276 INFO L225 Difference]: With dead ends: 476 [2020-08-19 04:30:01,278 INFO L226 Difference]: Without dead ends: 426 [2020-08-19 04:30:01,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:30:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-19 04:30:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-19 04:30:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 04:30:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-19 04:30:01,291 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-19 04:30:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:01,291 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-19 04:30:01,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 04:30:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-19 04:30:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 04:30:01,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:01,292 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 04:30:01,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:30:01,293 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-19 04:30:01,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:01,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045013512] [2020-08-19 04:30:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:01,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:01,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 04:30:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:01,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 04:30:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:01,540 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 04:30:01,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045013512] [2020-08-19 04:30:01,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:01,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 04:30:01,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701683632] [2020-08-19 04:30:01,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 04:30:01,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 04:30:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-19 04:30:01,550 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-19 04:30:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:02,696 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-19 04:30:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 04:30:02,696 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-19 04:30:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:02,702 INFO L225 Difference]: With dead ends: 499 [2020-08-19 04:30:02,702 INFO L226 Difference]: Without dead ends: 449 [2020-08-19 04:30:02,703 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 04:30:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-19 04:30:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-19 04:30:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 04:30:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-19 04:30:02,713 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-19 04:30:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:02,713 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-19 04:30:02,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 04:30:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-19 04:30:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 04:30:02,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:02,714 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 04:30:02,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 04:30:02,715 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:02,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-19 04:30:02,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:02,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720048775] [2020-08-19 04:30:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:02,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:02,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 04:30:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:02,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 04:30:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:02,993 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 04:30:02,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720048775] [2020-08-19 04:30:02,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:02,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 04:30:02,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762364640] [2020-08-19 04:30:02,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 04:30:02,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 04:30:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-19 04:30:02,997 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-19 04:30:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:04,318 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-19 04:30:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 04:30:04,319 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-19 04:30:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:04,322 INFO L225 Difference]: With dead ends: 522 [2020-08-19 04:30:04,323 INFO L226 Difference]: Without dead ends: 472 [2020-08-19 04:30:04,324 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 04:30:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-19 04:30:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-19 04:30:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-19 04:30:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-19 04:30:04,335 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-19 04:30:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:04,336 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-19 04:30:04,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 04:30:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-19 04:30:04,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 04:30:04,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:04,338 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 04:30:04,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 04:30:04,338 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-19 04:30:04,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:04,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086627934] [2020-08-19 04:30:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:04,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:04,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 04:30:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:04,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 04:30:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:04,612 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 04:30:04,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086627934] [2020-08-19 04:30:04,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:04,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 04:30:04,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491202801] [2020-08-19 04:30:04,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 04:30:04,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:04,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 04:30:04,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-19 04:30:04,616 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-19 04:30:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:06,126 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-19 04:30:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 04:30:06,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-19 04:30:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:06,130 INFO L225 Difference]: With dead ends: 545 [2020-08-19 04:30:06,130 INFO L226 Difference]: Without dead ends: 495 [2020-08-19 04:30:06,131 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 04:30:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-19 04:30:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-19 04:30:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 04:30:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-19 04:30:06,145 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-19 04:30:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:06,146 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-19 04:30:06,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 04:30:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-19 04:30:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 04:30:06,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:06,147 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 04:30:06,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 04:30:06,147 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:06,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-19 04:30:06,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:06,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907874829] [2020-08-19 04:30:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:06,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:06,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 04:30:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:06,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 04:30:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:06,526 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 04:30:06,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907874829] [2020-08-19 04:30:06,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:06,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 04:30:06,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675166364] [2020-08-19 04:30:06,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 04:30:06,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 04:30:06,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-19 04:30:06,530 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-19 04:30:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:07,764 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-19 04:30:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 04:30:07,765 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-19 04:30:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:07,768 INFO L225 Difference]: With dead ends: 568 [2020-08-19 04:30:07,768 INFO L226 Difference]: Without dead ends: 518 [2020-08-19 04:30:07,769 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 04:30:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-19 04:30:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-19 04:30:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-19 04:30:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-19 04:30:07,778 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-19 04:30:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:07,779 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-19 04:30:07,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 04:30:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-19 04:30:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 04:30:07,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:07,780 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 04:30:07,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 04:30:07,780 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-19 04:30:07,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:07,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716811755] [2020-08-19 04:30:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:08,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:08,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 04:30:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:08,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 04:30:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:08,081 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 04:30:08,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716811755] [2020-08-19 04:30:08,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:08,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 04:30:08,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536397178] [2020-08-19 04:30:08,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 04:30:08,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:08,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 04:30:08,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-19 04:30:08,085 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-19 04:30:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:09,251 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-19 04:30:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 04:30:09,256 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-19 04:30:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:09,260 INFO L225 Difference]: With dead ends: 591 [2020-08-19 04:30:09,260 INFO L226 Difference]: Without dead ends: 541 [2020-08-19 04:30:09,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:30:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-19 04:30:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-19 04:30:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-19 04:30:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-19 04:30:09,272 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-19 04:30:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:09,273 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-19 04:30:09,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 04:30:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-19 04:30:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 04:30:09,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:09,274 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 04:30:09,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 04:30:09,274 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-19 04:30:09,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:09,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705017791] [2020-08-19 04:30:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:09,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:09,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 04:30:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:09,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 04:30:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:09,674 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 04:30:09,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705017791] [2020-08-19 04:30:09,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:09,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 04:30:09,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968136326] [2020-08-19 04:30:09,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 04:30:09,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:09,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 04:30:09,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-19 04:30:09,686 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-19 04:30:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:10,999 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-19 04:30:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 04:30:11,000 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-19 04:30:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:11,010 INFO L225 Difference]: With dead ends: 614 [2020-08-19 04:30:11,010 INFO L226 Difference]: Without dead ends: 564 [2020-08-19 04:30:11,011 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 04:30:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-19 04:30:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-19 04:30:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 04:30:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-19 04:30:11,022 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-19 04:30:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:11,022 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-19 04:30:11,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 04:30:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-19 04:30:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 04:30:11,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:11,023 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 04:30:11,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 04:30:11,024 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:11,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-19 04:30:11,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:11,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444201050] [2020-08-19 04:30:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:11,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:11,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 04:30:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:11,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 04:30:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:11,566 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 04:30:11,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444201050] [2020-08-19 04:30:11,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:11,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 04:30:11,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962399239] [2020-08-19 04:30:11,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 04:30:11,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 04:30:11,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-19 04:30:11,569 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-19 04:30:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:13,524 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-19 04:30:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 04:30:13,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-19 04:30:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:13,530 INFO L225 Difference]: With dead ends: 637 [2020-08-19 04:30:13,530 INFO L226 Difference]: Without dead ends: 587 [2020-08-19 04:30:13,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-19 04:30:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-19 04:30:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-19 04:30:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 04:30:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-19 04:30:13,553 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-19 04:30:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:13,554 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-19 04:30:13,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 04:30:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-19 04:30:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 04:30:13,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:13,556 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 04:30:13,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 04:30:13,557 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-19 04:30:13,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:13,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182998671] [2020-08-19 04:30:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:14,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 04:30:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:14,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:30:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:14,088 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 04:30:14,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182998671] [2020-08-19 04:30:14,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:14,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 04:30:14,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158723232] [2020-08-19 04:30:14,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 04:30:14,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 04:30:14,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-19 04:30:14,092 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-19 04:30:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:16,553 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-19 04:30:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 04:30:16,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-19 04:30:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:16,559 INFO L225 Difference]: With dead ends: 660 [2020-08-19 04:30:16,559 INFO L226 Difference]: Without dead ends: 610 [2020-08-19 04:30:16,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-19 04:30:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-19 04:30:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-19 04:30:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-19 04:30:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-19 04:30:16,580 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-19 04:30:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:16,581 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-19 04:30:16,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 04:30:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-19 04:30:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 04:30:16,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:16,583 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 04:30:16,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 04:30:16,583 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:16,584 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-19 04:30:16,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:16,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814444536] [2020-08-19 04:30:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:17,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 04:30:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:17,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 04:30:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:17,159 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 04:30:17,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814444536] [2020-08-19 04:30:17,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:17,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 04:30:17,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297315377] [2020-08-19 04:30:17,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 04:30:17,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:17,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 04:30:17,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-19 04:30:17,163 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-19 04:30:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:18,906 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-19 04:30:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-19 04:30:18,911 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-19 04:30:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:18,915 INFO L225 Difference]: With dead ends: 683 [2020-08-19 04:30:18,915 INFO L226 Difference]: Without dead ends: 633 [2020-08-19 04:30:18,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-19 04:30:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-19 04:30:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-19 04:30:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 04:30:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-19 04:30:18,931 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-19 04:30:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:18,931 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-19 04:30:18,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 04:30:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-19 04:30:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 04:30:18,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:18,933 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 04:30:18,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 04:30:18,933 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-19 04:30:18,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:18,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110830491] [2020-08-19 04:30:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:19,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 04:30:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:19,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 04:30:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:19,409 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 04:30:19,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110830491] [2020-08-19 04:30:19,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:19,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 04:30:19,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049148719] [2020-08-19 04:30:19,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 04:30:19,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:19,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 04:30:19,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-19 04:30:19,412 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-19 04:30:21,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:21,443 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-19 04:30:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 04:30:21,444 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-19 04:30:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:21,447 INFO L225 Difference]: With dead ends: 706 [2020-08-19 04:30:21,447 INFO L226 Difference]: Without dead ends: 656 [2020-08-19 04:30:21,448 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 04:30:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-19 04:30:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-19 04:30:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-19 04:30:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-19 04:30:21,460 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-19 04:30:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:21,461 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-19 04:30:21,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 04:30:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-19 04:30:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 04:30:21,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:21,462 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 04:30:21,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 04:30:21,462 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-19 04:30:21,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:21,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413236169] [2020-08-19 04:30:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:21,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:21,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 04:30:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:21,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 04:30:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:21,996 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 04:30:21,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413236169] [2020-08-19 04:30:21,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:21,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 04:30:21,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329267312] [2020-08-19 04:30:21,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 04:30:21,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 04:30:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-19 04:30:21,998 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-19 04:30:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:24,169 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-19 04:30:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 04:30:24,169 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-19 04:30:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:24,173 INFO L225 Difference]: With dead ends: 729 [2020-08-19 04:30:24,173 INFO L226 Difference]: Without dead ends: 679 [2020-08-19 04:30:24,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 04:30:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-19 04:30:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-19 04:30:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-19 04:30:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-19 04:30:24,184 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-19 04:30:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:24,184 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-19 04:30:24,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 04:30:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-19 04:30:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 04:30:24,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:24,186 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 04:30:24,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 04:30:24,186 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-19 04:30:24,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:24,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665697164] [2020-08-19 04:30:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:24,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:24,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 04:30:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:24,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 04:30:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:24,725 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 04:30:24,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665697164] [2020-08-19 04:30:24,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:24,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 04:30:24,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107241785] [2020-08-19 04:30:24,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 04:30:24,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 04:30:24,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-19 04:30:24,728 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-19 04:30:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:26,558 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-19 04:30:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 04:30:26,559 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-19 04:30:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:26,562 INFO L225 Difference]: With dead ends: 752 [2020-08-19 04:30:26,562 INFO L226 Difference]: Without dead ends: 702 [2020-08-19 04:30:26,563 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 04:30:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-19 04:30:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-19 04:30:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 04:30:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-19 04:30:26,576 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-19 04:30:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:26,576 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-19 04:30:26,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 04:30:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-19 04:30:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 04:30:26,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:26,578 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 04:30:26,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 04:30:26,578 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-19 04:30:26,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:26,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066566510] [2020-08-19 04:30:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 04:30:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 04:30:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,660 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 04:30:26,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066566510] [2020-08-19 04:30:26,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:30:26,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:30:26,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231214837] [2020-08-19 04:30:26,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:30:26,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:26,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:30:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:30:26,664 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-19 04:30:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:26,799 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-19 04:30:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:30:26,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-19 04:30:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:26,801 INFO L225 Difference]: With dead ends: 177 [2020-08-19 04:30:26,801 INFO L226 Difference]: Without dead ends: 132 [2020-08-19 04:30:26,802 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 04:30:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-19 04:30:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-19 04:30:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 04:30:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-19 04:30:26,807 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-19 04:30:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:26,808 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-19 04:30:26,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:30:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-19 04:30:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 04:30:26,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:26,809 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 04:30:26,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 04:30:26,809 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-19 04:30:26,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:26,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751344816] [2020-08-19 04:30:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 04:30:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 04:30:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:26,880 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 04:30:26,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751344816] [2020-08-19 04:30:26,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:30:26,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 04:30:26,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355117509] [2020-08-19 04:30:26,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:30:26,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:26,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:30:26,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:30:26,883 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-19 04:30:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:27,074 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-19 04:30:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:30:27,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-19 04:30:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:27,077 INFO L225 Difference]: With dead ends: 200 [2020-08-19 04:30:27,077 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 04:30:27,077 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 04:30:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 04:30:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-19 04:30:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 04:30:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-19 04:30:27,083 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-19 04:30:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:27,083 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-19 04:30:27,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:30:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-19 04:30:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 04:30:27,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:27,085 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 04:30:27,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 04:30:27,085 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:27,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-19 04:30:27,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:27,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348089370] [2020-08-19 04:30:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 04:30:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 04:30:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,180 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 04:30:27,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348089370] [2020-08-19 04:30:27,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:30:27,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 04:30:27,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472988550] [2020-08-19 04:30:27,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 04:30:27,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 04:30:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 04:30:27,182 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-19 04:30:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:27,334 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-19 04:30:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 04:30:27,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-19 04:30:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:27,335 INFO L225 Difference]: With dead ends: 187 [2020-08-19 04:30:27,335 INFO L226 Difference]: Without dead ends: 139 [2020-08-19 04:30:27,336 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 04:30:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-19 04:30:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-19 04:30:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 04:30:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-19 04:30:27,351 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-19 04:30:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:27,351 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-19 04:30:27,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 04:30:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-19 04:30:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 04:30:27,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:30:27,353 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 04:30:27,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 04:30:27,354 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:30:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:30:27,354 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-19 04:30:27,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:30:27,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907584511] [2020-08-19 04:30:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:30:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:30:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 04:30:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 04:30:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:30:27,476 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 04:30:27,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907584511] [2020-08-19 04:30:27,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:30:27,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 04:30:27,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210027097] [2020-08-19 04:30:27,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 04:30:27,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:30:27,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 04:30:27,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 04:30:27,478 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-19 04:30:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:30:27,612 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-19 04:30:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 04:30:27,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-19 04:30:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:30:27,613 INFO L225 Difference]: With dead ends: 157 [2020-08-19 04:30:27,613 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:30:27,613 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 04:30:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:30:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:30:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:30:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:30:27,614 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-19 04:30:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:30:27,615 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:30:27,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 04:30:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:30:27,615 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:30:27,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 04:30:27,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:30:27,844 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-19 04:30:27,844 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-19 04:30:27,844 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-19 04:30:27,844 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-19 04:30:27,844 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-19 04:30:27,845 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 04:30:27,845 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-19 04:30:27,845 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:30:27,845 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 04:30:27,845 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:30:27,845 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-19 04:30:27,845 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-19 04:30:27,845 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-19 04:30:27,845 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:30:27,846 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 04:30:27,846 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 04:30:27,846 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:30:27,846 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-19 04:30:27,846 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-19 04:30:27,846 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-19 04:30:27,846 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-19 04:30:27,847 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 04:30:27,847 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-19 04:30:27,847 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 04:30:27,847 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-19 04:30:27,847 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-19 04:30:27,847 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 04:30:27,847 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-19 04:30:27,847 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-19 04:30:27,848 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-19 04:30:27,848 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-19 04:30:27,848 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-19 04:30:27,848 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-19 04:30:27,848 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-19 04:30:27,848 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-19 04:30:27,848 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-19 04:30:27,849 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 04:30:27,849 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-19 04:30:27,849 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-19 04:30:27,849 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-19 04:30:27,849 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-19 04:30:27,849 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-19 04:30:27,849 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 04:30:27,849 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-19 04:30:27,850 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 04:30:27,850 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-19 04:30:27,850 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-19 04:30:27,850 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-19 04:30:27,850 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-19 04:30:27,850 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 04:30:27,850 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-19 04:30:27,850 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-19 04:30:27,851 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-19 04:30:27,851 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-19 04:30:27,851 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-19 04:30:27,851 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-19 04:30:27,851 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-19 04:30:27,851 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-19 04:30:27,851 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-19 04:30:27,852 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-19 04:30:27,852 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-19 04:30:27,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:30:27 BoogieIcfgContainer [2020-08-19 04:30:27,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:30:27,874 INFO L168 Benchmark]: Toolchain (without parser) took 40806.40 ms. Allocated memory was 146.8 MB in the beginning and 443.0 MB in the end (delta: 296.2 MB). Free memory was 101.8 MB in the beginning and 238.8 MB in the end (delta: -137.0 MB). Peak memory consumption was 159.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:30:27,875 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:30:27,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 414.10 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 101.4 MB in the beginning and 181.7 MB in the end (delta: -80.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:30:27,876 INFO L168 Benchmark]: Boogie Preprocessor took 48.36 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:30:27,876 INFO L168 Benchmark]: RCFGBuilder took 505.09 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 156.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-19 04:30:27,877 INFO L168 Benchmark]: TraceAbstraction took 39831.64 ms. Allocated memory was 202.9 MB in the beginning and 443.0 MB in the end (delta: 240.1 MB). Free memory was 155.6 MB in the beginning and 238.8 MB in the end (delta: -83.2 MB). Peak memory consumption was 156.9 MB. Max. memory is 7.1 GB. [2020-08-19 04:30:27,879 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 414.10 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 101.4 MB in the beginning and 181.7 MB in the end (delta: -80.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.36 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 505.09 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 156.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39831.64 ms. Allocated memory was 202.9 MB in the beginning and 443.0 MB in the end (delta: 240.1 MB). Free memory was 155.6 MB in the beginning and 238.8 MB in the end (delta: -83.2 MB). Peak memory consumption was 156.9 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: 39.5s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.6s, 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, 21.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.6s 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: 0.4s 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: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.1s 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...