/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-22 04:46:09,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:46:09,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:46:09,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:46:09,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:46:09,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:46:09,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:46:09,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:46:09,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:46:09,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:46:09,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:46:09,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:46:09,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:46:09,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:46:09,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:46:09,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:46:09,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:46:09,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:46:09,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:46:09,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:46:09,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:46:09,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:46:09,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:46:09,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:46:09,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:46:09,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:46:09,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:46:09,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:46:09,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:46:09,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:46:09,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:46:09,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:46:09,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:46:09,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:46:09,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:46:09,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:46:09,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:46:09,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:46:09,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:46:09,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:46:09,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:46:09,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 04:46:09,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:46:09,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:46:09,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:46:09,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:46:09,562 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:46:09,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:46:09,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:46:09,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:46:09,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:46:09,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:46:09,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:46:09,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:46:09,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:46:09,565 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:46:09,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:46:09,565 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:46:09,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:46:09,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:46:09,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:46:09,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:46:09,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:46:09,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:09,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:46:09,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:46:09,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:46:09,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:46:09,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:46:09,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:46:09,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:46:09,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:46:09,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:46:09,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:46:09,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:46:09,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:46:09,928 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:46:09,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 04:46:09,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a73152ec/1773b51ce6604fffac620500c1344fe6/FLAG05ef04b20 [2020-08-22 04:46:10,464 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:46:10,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 04:46:10,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a73152ec/1773b51ce6604fffac620500c1344fe6/FLAG05ef04b20 [2020-08-22 04:46:10,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a73152ec/1773b51ce6604fffac620500c1344fe6 [2020-08-22 04:46:10,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:46:10,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:46:10,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:10,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:46:10,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:46:10,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:10" (1/1) ... [2020-08-22 04:46:10,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db1276a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:10, skipping insertion in model container [2020-08-22 04:46:10,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:10" (1/1) ... [2020-08-22 04:46:10,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:46:10,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:46:11,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:11,117 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:46:11,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:11,258 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:46:11,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11 WrapperNode [2020-08-22 04:46:11,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:11,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:46:11,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:46:11,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:46:11,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:46:11,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:46:11,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:46:11,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:46:11,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:46:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:46:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 04:46:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-22 04:46:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-22 04:46:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:46:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:46:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 04:46:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:46:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-22 04:46:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 04:46:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-22 04:46:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 04:46:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:46:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 04:46:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 04:46:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:46:11,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:46:11,813 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:46:11,813 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-22 04:46:11,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:11 BoogieIcfgContainer [2020-08-22 04:46:11,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:46:11,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:46:11,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:46:11,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:46:11,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:46:10" (1/3) ... [2020-08-22 04:46:11,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a464634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:11, skipping insertion in model container [2020-08-22 04:46:11,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11" (2/3) ... [2020-08-22 04:46:11,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a464634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:11, skipping insertion in model container [2020-08-22 04:46:11,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:11" (3/3) ... [2020-08-22 04:46:11,840 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-22 04:46:11,851 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:46:11,858 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:46:11,873 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:46:11,894 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:46:11,894 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:46:11,895 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:46:11,895 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:46:11,895 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:46:11,895 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:46:11,895 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:46:11,895 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:46:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-22 04:46:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 04:46:11,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:11,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:11,921 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-22 04:46:11,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:11,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705380139] [2020-08-22 04:46:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:12,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:12,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705380139] [2020-08-22 04:46:12,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:12,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:46:12,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272691124] [2020-08-22 04:46:12,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:46:12,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:12,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:46:12,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:46:12,184 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-22 04:46:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:12,507 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-22 04:46:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:46:12,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 04:46:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:12,520 INFO L225 Difference]: With dead ends: 150 [2020-08-22 04:46:12,520 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 04:46:12,525 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 [2020-08-22 04:46:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 04:46:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-22 04:46:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 04:46:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-22 04:46:12,578 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-22 04:46:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:12,579 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-22 04:46:12,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:46:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-22 04:46:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 04:46:12,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:12,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:12,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:46:12,582 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-22 04:46:12,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:12,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415607630] [2020-08-22 04:46:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:12,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415607630] [2020-08-22 04:46:12,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:12,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 04:46:12,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371670823] [2020-08-22 04:46:12,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:12,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:12,668 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-22 04:46:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:13,034 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-22 04:46:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:46:13,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 04:46:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:13,037 INFO L225 Difference]: With dead ends: 170 [2020-08-22 04:46:13,037 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 04:46:13,039 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 [2020-08-22 04:46:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 04:46:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-22 04:46:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 04:46:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-22 04:46:13,053 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-22 04:46:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:13,053 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-22 04:46:13,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-22 04:46:13,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 04:46:13,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:13,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:13,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:46:13,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:13,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-22 04:46:13,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:13,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560214257] [2020-08-22 04:46:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:13,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560214257] [2020-08-22 04:46:13,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:13,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:46:13,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316218829] [2020-08-22 04:46:13,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:13,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:13,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:13,156 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-22 04:46:13,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:13,483 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-22 04:46:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:46:13,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-22 04:46:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:13,486 INFO L225 Difference]: With dead ends: 203 [2020-08-22 04:46:13,487 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 04:46:13,488 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 [2020-08-22 04:46:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 04:46:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-22 04:46:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 04:46:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-22 04:46:13,504 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-22 04:46:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:13,504 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-22 04:46:13,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-22 04:46:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:46:13,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:13,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:13,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:46:13,506 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-22 04:46:13,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:13,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34762552] [2020-08-22 04:46:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:13,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34762552] [2020-08-22 04:46:13,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:13,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:46:13,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603258765] [2020-08-22 04:46:13,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:46:13,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:46:13,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:13,587 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-22 04:46:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:13,967 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-22 04:46:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:46:13,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 04:46:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:13,972 INFO L225 Difference]: With dead ends: 236 [2020-08-22 04:46:13,972 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 04:46:13,974 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 [2020-08-22 04:46:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 04:46:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-22 04:46:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 04:46:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-22 04:46:13,997 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-22 04:46:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:13,998 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-22 04:46:13,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:46:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-22 04:46:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:46:14,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:14,002 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:14,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:46:14,002 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:14,003 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-22 04:46:14,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:14,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406706080] [2020-08-22 04:46:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 04:46:14,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406706080] [2020-08-22 04:46:14,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:14,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:14,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137241231] [2020-08-22 04:46:14,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:14,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:14,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:14,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:14,127 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-22 04:46:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:14,243 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-22 04:46:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:46:14,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-22 04:46:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:14,245 INFO L225 Difference]: With dead ends: 116 [2020-08-22 04:46:14,245 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 04:46:14,246 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 [2020-08-22 04:46:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 04:46:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-22 04:46:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 04:46:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-22 04:46:14,254 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-22 04:46:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:14,255 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-22 04:46:14,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-22 04:46:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 04:46:14,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:14,259 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] [2020-08-22 04:46:14,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:46:14,259 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-22 04:46:14,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:14,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124225313] [2020-08-22 04:46:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 04:46:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 04:46:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:14,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124225313] [2020-08-22 04:46:14,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:14,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:46:14,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598810160] [2020-08-22 04:46:14,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:46:14,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:14,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:46:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:46:14,367 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-22 04:46:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:14,718 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-22 04:46:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:46:14,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-22 04:46:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:14,727 INFO L225 Difference]: With dead ends: 223 [2020-08-22 04:46:14,727 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 04:46:14,728 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 [2020-08-22 04:46:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 04:46:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-22 04:46:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 04:46:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-22 04:46:14,747 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-22 04:46:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:14,748 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-22 04:46:14,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:46:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-22 04:46:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 04:46:14,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:14,752 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] [2020-08-22 04:46:14,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:46:14,752 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-22 04:46:14,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:14,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967725469] [2020-08-22 04:46:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:46:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 04:46:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:14,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967725469] [2020-08-22 04:46:14,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:14,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:46:14,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780970680] [2020-08-22 04:46:14,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:46:14,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:46:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:46:14,911 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-22 04:46:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:15,348 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-22 04:46:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:46:15,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 04:46:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:15,352 INFO L225 Difference]: With dead ends: 246 [2020-08-22 04:46:15,352 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 04:46:15,354 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 [2020-08-22 04:46:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 04:46:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-22 04:46:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 04:46:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-22 04:46:15,378 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-22 04:46:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:15,378 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-22 04:46:15,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:46:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-22 04:46:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 04:46:15,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,380 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] [2020-08-22 04:46:15,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:46:15,380 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-22 04:46:15,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860216163] [2020-08-22 04:46:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 04:46:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 04:46:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:15,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860216163] [2020-08-22 04:46:15,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:15,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:46:15,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808247322] [2020-08-22 04:46:15,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:46:15,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:15,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:46:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:46:15,486 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-22 04:46:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:16,026 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-22 04:46:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:46:16,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-22 04:46:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:16,028 INFO L225 Difference]: With dead ends: 269 [2020-08-22 04:46:16,029 INFO L226 Difference]: Without dead ends: 219 [2020-08-22 04:46:16,030 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 [2020-08-22 04:46:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-22 04:46:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-22 04:46:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 04:46:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-22 04:46:16,056 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-22 04:46:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:16,059 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-22 04:46:16,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:46:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-22 04:46:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 04:46:16,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:16,061 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] [2020-08-22 04:46:16,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:46:16,061 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-22 04:46:16,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:16,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612279769] [2020-08-22 04:46:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 04:46:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 04:46:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:16,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612279769] [2020-08-22 04:46:16,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:16,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:46:16,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753277398] [2020-08-22 04:46:16,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:46:16,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:46:16,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:46:16,215 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-22 04:46:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:16,820 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-22 04:46:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 04:46:16,821 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-22 04:46:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:16,824 INFO L225 Difference]: With dead ends: 292 [2020-08-22 04:46:16,824 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 04:46:16,825 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 [2020-08-22 04:46:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 04:46:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-22 04:46:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 04:46:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-22 04:46:16,835 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-22 04:46:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:16,835 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-22 04:46:16,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:46:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-22 04:46:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 04:46:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:16,837 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] [2020-08-22 04:46:16,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:46:16,837 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-22 04:46:16,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:16,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984442773] [2020-08-22 04:46:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 04:46:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:46:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:16,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984442773] [2020-08-22 04:46:16,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:16,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:46:16,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364486315] [2020-08-22 04:46:16,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:46:16,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:46:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:46:16,987 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-22 04:46:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:17,574 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-22 04:46:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:46:17,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-22 04:46:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:17,578 INFO L225 Difference]: With dead ends: 315 [2020-08-22 04:46:17,578 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 04:46:17,579 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 [2020-08-22 04:46:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 04:46:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-22 04:46:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 04:46:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-22 04:46:17,588 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-22 04:46:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:17,589 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-22 04:46:17,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:46:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-22 04:46:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 04:46:17,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:17,590 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] [2020-08-22 04:46:17,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:46:17,591 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:17,591 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-22 04:46:17,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:17,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972057729] [2020-08-22 04:46:17,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 04:46:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 04:46:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:17,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972057729] [2020-08-22 04:46:17,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:17,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:46:17,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131342744] [2020-08-22 04:46:17,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:46:17,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:46:17,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:46:17,746 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-22 04:46:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,390 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-22 04:46:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 04:46:18,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-22 04:46:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,394 INFO L225 Difference]: With dead ends: 338 [2020-08-22 04:46:18,394 INFO L226 Difference]: Without dead ends: 288 [2020-08-22 04:46:18,395 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 [2020-08-22 04:46:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-22 04:46:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-22 04:46:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 04:46:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-22 04:46:18,404 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-22 04:46:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,404 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-22 04:46:18,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:46:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-22 04:46:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 04:46:18,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,406 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] [2020-08-22 04:46:18,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:46:18,406 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-22 04:46:18,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784871369] [2020-08-22 04:46:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 04:46:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 04:46:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:18,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784871369] [2020-08-22 04:46:18,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:18,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 04:46:18,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680403663] [2020-08-22 04:46:18,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 04:46:18,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:18,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 04:46:18,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:46:18,594 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-22 04:46:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:19,295 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-22 04:46:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 04:46:19,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-22 04:46:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:19,299 INFO L225 Difference]: With dead ends: 361 [2020-08-22 04:46:19,299 INFO L226 Difference]: Without dead ends: 311 [2020-08-22 04:46:19,301 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 [2020-08-22 04:46:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-22 04:46:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-22 04:46:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 04:46:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-22 04:46:19,327 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-22 04:46:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:19,328 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-22 04:46:19,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 04:46:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-22 04:46:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 04:46:19,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:19,330 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] [2020-08-22 04:46:19,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:46:19,330 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-22 04:46:19,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:19,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054003623] [2020-08-22 04:46:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 04:46:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 04:46:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:19,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054003623] [2020-08-22 04:46:19,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:19,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 04:46:19,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941522483] [2020-08-22 04:46:19,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 04:46:19,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 04:46:19,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:46:19,576 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-22 04:46:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:20,293 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-22 04:46:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 04:46:20,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-22 04:46:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:20,297 INFO L225 Difference]: With dead ends: 384 [2020-08-22 04:46:20,297 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 04:46:20,298 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 [2020-08-22 04:46:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 04:46:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-22 04:46:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 04:46:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-22 04:46:20,308 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-22 04:46:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:20,308 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-22 04:46:20,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 04:46:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-22 04:46:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 04:46:20,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:20,311 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] [2020-08-22 04:46:20,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:46:20,311 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-22 04:46:20,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:20,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535845243] [2020-08-22 04:46:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:46:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 04:46:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:20,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535845243] [2020-08-22 04:46:20,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:20,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 04:46:20,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595965688] [2020-08-22 04:46:20,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 04:46:20,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:20,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 04:46:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:46:20,576 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-22 04:46:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:21,388 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-22 04:46:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 04:46:21,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-22 04:46:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:21,396 INFO L225 Difference]: With dead ends: 407 [2020-08-22 04:46:21,396 INFO L226 Difference]: Without dead ends: 357 [2020-08-22 04:46:21,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-22 04:46:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-22 04:46:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-22 04:46:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 04:46:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-22 04:46:21,405 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-22 04:46:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:21,406 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-22 04:46:21,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 04:46:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-22 04:46:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 04:46:21,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:21,407 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] [2020-08-22 04:46:21,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:46:21,407 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:21,408 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-22 04:46:21,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:21,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196918742] [2020-08-22 04:46:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:21,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 04:46:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 04:46:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:21,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196918742] [2020-08-22 04:46:21,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:21,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 04:46:21,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542378197] [2020-08-22 04:46:21,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 04:46:21,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:21,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 04:46:21,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:46:21,603 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-22 04:46:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:22,472 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-22 04:46:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 04:46:22,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-22 04:46:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:22,476 INFO L225 Difference]: With dead ends: 430 [2020-08-22 04:46:22,476 INFO L226 Difference]: Without dead ends: 380 [2020-08-22 04:46:22,480 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 [2020-08-22 04:46:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-22 04:46:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-22 04:46:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 04:46:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-22 04:46:22,494 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-22 04:46:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:22,494 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-22 04:46:22,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 04:46:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-22 04:46:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 04:46:22,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:22,496 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] [2020-08-22 04:46:22,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:46:22,496 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-22 04:46:22,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:22,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235593517] [2020-08-22 04:46:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 04:46:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 04:46:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:22,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235593517] [2020-08-22 04:46:22,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:22,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 04:46:22,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33055874] [2020-08-22 04:46:22,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 04:46:22,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 04:46:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 04:46:22,724 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-22 04:46:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:23,864 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-22 04:46:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 04:46:23,865 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-22 04:46:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:23,869 INFO L225 Difference]: With dead ends: 453 [2020-08-22 04:46:23,869 INFO L226 Difference]: Without dead ends: 403 [2020-08-22 04:46:23,870 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 [2020-08-22 04:46:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-22 04:46:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-22 04:46:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 04:46:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-22 04:46:23,891 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-22 04:46:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:23,894 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-22 04:46:23,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 04:46:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-22 04:46:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 04:46:23,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:23,896 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] [2020-08-22 04:46:23,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:46:23,897 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-22 04:46:23,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:23,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139740423] [2020-08-22 04:46:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 04:46:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 04:46:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:24,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139740423] [2020-08-22 04:46:24,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:24,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 04:46:24,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800011347] [2020-08-22 04:46:24,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 04:46:24,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 04:46:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 04:46:24,230 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-22 04:46:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:25,101 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-22 04:46:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 04:46:25,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-22 04:46:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:25,105 INFO L225 Difference]: With dead ends: 476 [2020-08-22 04:46:25,105 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 04:46:25,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:46:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 04:46:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-22 04:46:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 04:46:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-22 04:46:25,115 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-22 04:46:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:25,116 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-22 04:46:25,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 04:46:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-22 04:46:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 04:46:25,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:25,117 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] [2020-08-22 04:46:25,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 04:46:25,117 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:25,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-22 04:46:25,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:25,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647804729] [2020-08-22 04:46:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 04:46:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 04:46:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:25,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647804729] [2020-08-22 04:46:25,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:25,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 04:46:25,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805772609] [2020-08-22 04:46:25,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 04:46:25,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:25,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 04:46:25,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 04:46:25,349 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-22 04:46:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:26,399 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-22 04:46:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 04:46:26,400 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-22 04:46:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:26,404 INFO L225 Difference]: With dead ends: 499 [2020-08-22 04:46:26,404 INFO L226 Difference]: Without dead ends: 449 [2020-08-22 04:46:26,405 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 [2020-08-22 04:46:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-22 04:46:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-22 04:46:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 04:46:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-22 04:46:26,418 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-22 04:46:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:26,419 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-22 04:46:26,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 04:46:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-22 04:46:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 04:46:26,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:26,420 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] [2020-08-22 04:46:26,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 04:46:26,420 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:26,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-22 04:46:26,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:26,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491571134] [2020-08-22 04:46:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 04:46:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 04:46:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:26,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491571134] [2020-08-22 04:46:26,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:26,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 04:46:26,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379182714] [2020-08-22 04:46:26,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 04:46:26,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:26,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 04:46:26,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:46:26,706 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-22 04:46:28,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:28,077 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-22 04:46:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 04:46:28,078 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-22 04:46:28,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:28,082 INFO L225 Difference]: With dead ends: 522 [2020-08-22 04:46:28,082 INFO L226 Difference]: Without dead ends: 472 [2020-08-22 04:46:28,083 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 [2020-08-22 04:46:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-22 04:46:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-22 04:46:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 04:46:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-22 04:46:28,094 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-22 04:46:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:28,094 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-22 04:46:28,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 04:46:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-22 04:46:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 04:46:28,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:28,096 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] [2020-08-22 04:46:28,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 04:46:28,096 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-22 04:46:28,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:28,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627580647] [2020-08-22 04:46:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 04:46:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 04:46:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:28,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627580647] [2020-08-22 04:46:28,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:28,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 04:46:28,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203656881] [2020-08-22 04:46:28,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 04:46:28,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:28,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 04:46:28,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 04:46:28,409 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-22 04:46:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:29,657 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-22 04:46:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 04:46:29,658 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-22 04:46:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:29,662 INFO L225 Difference]: With dead ends: 545 [2020-08-22 04:46:29,663 INFO L226 Difference]: Without dead ends: 495 [2020-08-22 04:46:29,664 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 [2020-08-22 04:46:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-22 04:46:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-22 04:46:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 04:46:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-22 04:46:29,680 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-22 04:46:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:29,681 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-22 04:46:29,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 04:46:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-22 04:46:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 04:46:29,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:29,682 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] [2020-08-22 04:46:29,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 04:46:29,682 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-22 04:46:29,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:29,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067178644] [2020-08-22 04:46:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:29,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 04:46:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:30,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 04:46:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:30,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067178644] [2020-08-22 04:46:30,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:30,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 04:46:30,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608935964] [2020-08-22 04:46:30,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 04:46:30,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:30,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 04:46:30,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:46:30,017 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-22 04:46:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:31,169 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-22 04:46:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 04:46:31,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-22 04:46:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:31,173 INFO L225 Difference]: With dead ends: 568 [2020-08-22 04:46:31,173 INFO L226 Difference]: Without dead ends: 518 [2020-08-22 04:46:31,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-22 04:46:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-22 04:46:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-22 04:46:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 04:46:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-22 04:46:31,185 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-22 04:46:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:31,185 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-22 04:46:31,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 04:46:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-22 04:46:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 04:46:31,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:31,186 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] [2020-08-22 04:46:31,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 04:46:31,187 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:31,187 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-22 04:46:31,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:31,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18170381] [2020-08-22 04:46:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 04:46:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 04:46:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:31,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18170381] [2020-08-22 04:46:31,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:31,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 04:46:31,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756076464] [2020-08-22 04:46:31,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 04:46:31,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 04:46:31,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-22 04:46:31,516 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-22 04:46:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:32,747 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-22 04:46:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 04:46:32,750 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-22 04:46:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:32,753 INFO L225 Difference]: With dead ends: 591 [2020-08-22 04:46:32,753 INFO L226 Difference]: Without dead ends: 541 [2020-08-22 04:46:32,756 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 [2020-08-22 04:46:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-22 04:46:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-22 04:46:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 04:46:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-22 04:46:32,768 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-22 04:46:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:32,769 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-22 04:46:32,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 04:46:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-22 04:46:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 04:46:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:32,770 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] [2020-08-22 04:46:32,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 04:46:32,770 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-22 04:46:32,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:32,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315814881] [2020-08-22 04:46:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:33,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:33,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 04:46:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:33,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 04:46:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:33,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315814881] [2020-08-22 04:46:33,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:33,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 04:46:33,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383879264] [2020-08-22 04:46:33,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 04:46:33,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:33,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 04:46:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-22 04:46:33,213 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-22 04:46:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:34,589 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-22 04:46:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 04:46:34,589 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-22 04:46:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:34,593 INFO L225 Difference]: With dead ends: 614 [2020-08-22 04:46:34,594 INFO L226 Difference]: Without dead ends: 564 [2020-08-22 04:46:34,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-22 04:46:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-22 04:46:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-22 04:46:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 04:46:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-22 04:46:34,606 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-22 04:46:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:34,606 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-22 04:46:34,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 04:46:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-22 04:46:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 04:46:34,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:34,607 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] [2020-08-22 04:46:34,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 04:46:34,607 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:34,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-22 04:46:34,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:34,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901484121] [2020-08-22 04:46:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:34,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:34,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 04:46:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:35,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 04:46:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:35,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901484121] [2020-08-22 04:46:35,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:35,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 04:46:35,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192941461] [2020-08-22 04:46:35,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 04:46:35,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:35,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 04:46:35,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-22 04:46:35,028 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-22 04:46:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:36,997 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-22 04:46:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 04:46:36,998 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-22 04:46:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:37,003 INFO L225 Difference]: With dead ends: 637 [2020-08-22 04:46:37,003 INFO L226 Difference]: Without dead ends: 587 [2020-08-22 04:46:37,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-22 04:46:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-22 04:46:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-22 04:46:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 04:46:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-22 04:46:37,022 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-22 04:46:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:37,023 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-22 04:46:37,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 04:46:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-22 04:46:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 04:46:37,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:37,025 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] [2020-08-22 04:46:37,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 04:46:37,025 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:37,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-22 04:46:37,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:37,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602367611] [2020-08-22 04:46:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 04:46:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 04:46:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:37,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602367611] [2020-08-22 04:46:37,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:37,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 04:46:37,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863669165] [2020-08-22 04:46:37,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 04:46:37,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 04:46:37,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-22 04:46:37,570 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-22 04:46:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:39,940 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-22 04:46:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 04:46:39,941 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 04:46:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:39,946 INFO L225 Difference]: With dead ends: 660 [2020-08-22 04:46:39,946 INFO L226 Difference]: Without dead ends: 610 [2020-08-22 04:46:39,947 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 [2020-08-22 04:46:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-22 04:46:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-22 04:46:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 04:46:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-22 04:46:39,966 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-22 04:46:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:39,966 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-22 04:46:39,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 04:46:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-22 04:46:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 04:46:39,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:39,968 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] [2020-08-22 04:46:39,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 04:46:39,969 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:39,969 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-22 04:46:39,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:39,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880660608] [2020-08-22 04:46:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 04:46:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 04:46:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:40,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880660608] [2020-08-22 04:46:40,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:40,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 04:46:40,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028868262] [2020-08-22 04:46:40,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 04:46:40,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:40,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 04:46:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-22 04:46:40,493 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-22 04:46:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:42,329 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-22 04:46:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 04:46:42,334 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-22 04:46:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:42,338 INFO L225 Difference]: With dead ends: 683 [2020-08-22 04:46:42,338 INFO L226 Difference]: Without dead ends: 633 [2020-08-22 04:46:42,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-22 04:46:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-22 04:46:42,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-22 04:46:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 04:46:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-22 04:46:42,350 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-22 04:46:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:42,350 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-22 04:46:42,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 04:46:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-22 04:46:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 04:46:42,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:42,351 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] [2020-08-22 04:46:42,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 04:46:42,352 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-22 04:46:42,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:42,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191170053] [2020-08-22 04:46:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 04:46:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 04:46:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:42,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191170053] [2020-08-22 04:46:42,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:42,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 04:46:42,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103961310] [2020-08-22 04:46:42,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 04:46:42,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:42,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 04:46:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-22 04:46:42,853 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-22 04:46:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:44,770 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-22 04:46:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 04:46:44,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-22 04:46:44,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:44,775 INFO L225 Difference]: With dead ends: 706 [2020-08-22 04:46:44,775 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 04:46:44,776 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 [2020-08-22 04:46:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 04:46:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-22 04:46:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 04:46:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-22 04:46:44,788 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-22 04:46:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:44,789 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-22 04:46:44,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 04:46:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-22 04:46:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 04:46:44,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:44,790 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] [2020-08-22 04:46:44,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 04:46:44,790 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:44,791 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-22 04:46:44,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:44,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836181949] [2020-08-22 04:46:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:45,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:45,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 04:46:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:45,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 04:46:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:45,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836181949] [2020-08-22 04:46:45,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:45,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 04:46:45,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523321056] [2020-08-22 04:46:45,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 04:46:45,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 04:46:45,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-22 04:46:45,333 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-22 04:46:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:47,385 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-22 04:46:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 04:46:47,386 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-22 04:46:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:47,389 INFO L225 Difference]: With dead ends: 729 [2020-08-22 04:46:47,389 INFO L226 Difference]: Without dead ends: 679 [2020-08-22 04:46:47,389 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 [2020-08-22 04:46:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-22 04:46:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-22 04:46:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 04:46:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-22 04:46:47,399 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-22 04:46:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:47,400 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-22 04:46:47,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 04:46:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-22 04:46:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 04:46:47,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:47,401 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] [2020-08-22 04:46:47,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 04:46:47,401 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-22 04:46:47,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:47,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797235517] [2020-08-22 04:46:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:47,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:47,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 04:46:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:47,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 04:46:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:47,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797235517] [2020-08-22 04:46:47,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:47,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 04:46:47,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804466646] [2020-08-22 04:46:47,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 04:46:47,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 04:46:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-22 04:46:47,927 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-22 04:46:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:49,680 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-22 04:46:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 04:46:49,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-22 04:46:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:49,683 INFO L225 Difference]: With dead ends: 752 [2020-08-22 04:46:49,684 INFO L226 Difference]: Without dead ends: 702 [2020-08-22 04:46:49,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 04:46:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-22 04:46:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-22 04:46:49,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 04:46:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-22 04:46:49,695 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-22 04:46:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:49,696 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-22 04:46:49,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 04:46:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-22 04:46:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 04:46:49,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:49,697 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] [2020-08-22 04:46:49,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 04:46:49,697 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:49,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-22 04:46:49,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:49,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575270537] [2020-08-22 04:46:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 04:46:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 04:46:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 04:46:49,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575270537] [2020-08-22 04:46:49,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:49,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:49,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021572933] [2020-08-22 04:46:49,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:49,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:49,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:49,761 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-22 04:46:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:49,892 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-22 04:46:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:46:49,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-22 04:46:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:49,894 INFO L225 Difference]: With dead ends: 177 [2020-08-22 04:46:49,894 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 04:46:49,895 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 [2020-08-22 04:46:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 04:46:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-22 04:46:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 04:46:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-22 04:46:49,899 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-22 04:46:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:49,900 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-22 04:46:49,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-22 04:46:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 04:46:49,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:49,901 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] [2020-08-22 04:46:49,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 04:46:49,901 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-22 04:46:49,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:49,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049877160] [2020-08-22 04:46:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 04:46:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 04:46:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 04:46:49,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049877160] [2020-08-22 04:46:49,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:49,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:46:49,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213804045] [2020-08-22 04:46:49,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:49,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:49,977 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-22 04:46:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:50,146 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-22 04:46:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:46:50,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-22 04:46:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:50,147 INFO L225 Difference]: With dead ends: 200 [2020-08-22 04:46:50,147 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 04:46:50,148 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 [2020-08-22 04:46:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 04:46:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-22 04:46:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 04:46:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-22 04:46:50,153 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-22 04:46:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:50,153 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-22 04:46:50,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-22 04:46:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 04:46:50,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:50,155 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] [2020-08-22 04:46:50,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 04:46:50,155 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-22 04:46:50,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:50,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652515327] [2020-08-22 04:46:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 04:46:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 04:46:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 04:46:50,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652515327] [2020-08-22 04:46:50,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:50,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 04:46:50,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475569513] [2020-08-22 04:46:50,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:50,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:50,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:50,248 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-22 04:46:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:50,389 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-22 04:46:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:46:50,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-22 04:46:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:50,391 INFO L225 Difference]: With dead ends: 187 [2020-08-22 04:46:50,391 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 04:46:50,391 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 [2020-08-22 04:46:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 04:46:50,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-22 04:46:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 04:46:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-22 04:46:50,397 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-22 04:46:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:50,398 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-22 04:46:50,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-22 04:46:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 04:46:50,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:50,399 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] [2020-08-22 04:46:50,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 04:46:50,399 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-22 04:46:50,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:50,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575377761] [2020-08-22 04:46:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 04:46:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 04:46:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 04:46:50,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575377761] [2020-08-22 04:46:50,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:50,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 04:46:50,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034053471] [2020-08-22 04:46:50,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:46:50,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:46:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:50,506 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-22 04:46:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:50,626 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-22 04:46:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:46:50,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-22 04:46:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:50,631 INFO L225 Difference]: With dead ends: 157 [2020-08-22 04:46:50,631 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:46:50,632 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 [2020-08-22 04:46:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:46:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:46:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:46:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:46:50,633 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-22 04:46:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:50,633 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:46:50,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:46:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:46:50,633 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:46:50,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 04:46:50,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:46:50,902 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 04:46:50,903 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 04:46:50,903 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-22 04:46:50,903 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-22 04:46:50,903 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-22 04:46:50,903 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|)) [2020-08-22 04:46:50,903 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-22 04:46:50,903 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:46:50,904 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|)) [2020-08-22 04:46:50,904 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:46:50,904 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-22 04:46:50,904 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-22 04:46:50,904 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-22 04:46:50,904 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:46:50,904 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:46:50,904 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:46:50,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:46:50,905 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-22 04:46:50,906 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-22 04:46:50,906 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-22 04:46:50,906 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-22 04:46:50,906 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 04:46:50,906 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-22 04:46:50,906 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 04:46:50,906 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-22 04:46:50,907 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-22 04:46:50,907 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 04:46:50,908 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-22 04:46:50,908 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-22 04:46:50,908 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-22 04:46:50,909 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-22 04:46:50,909 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-22 04:46:50,909 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-22 04:46:50,909 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-22 04:46:50,909 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-22 04:46:50,909 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-22 04:46:50,909 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-22 04:46:50,909 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-22 04:46:50,910 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-22 04:46:50,911 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-22 04:46:50,911 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-22 04:46:50,912 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-22 04:46:50,912 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 04:46:50,912 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-22 04:46:50,913 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 04:46:50,913 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-22 04:46:50,913 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-22 04:46:50,913 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-22 04:46:50,913 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-22 04:46:50,915 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 04:46:50,915 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-22 04:46:50,915 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-22 04:46:50,915 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-22 04:46:50,915 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-22 04:46:50,916 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-22 04:46:50,916 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-22 04:46:50,916 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-22 04:46:50,916 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-22 04:46:50,916 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-22 04:46:50,916 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-22 04:46:50,917 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-22 04:46:50,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:46:50 BoogieIcfgContainer [2020-08-22 04:46:50,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:46:50,955 INFO L168 Benchmark]: Toolchain (without parser) took 40056.21 ms. Allocated memory was 146.3 MB in the beginning and 457.2 MB in the end (delta: 310.9 MB). Free memory was 102.8 MB in the beginning and 102.4 MB in the end (delta: 445.0 kB). Peak memory consumption was 311.3 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:50,956 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 04:46:50,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.49 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 181.4 MB in the end (delta: -78.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:50,957 INFO L168 Benchmark]: Boogie Preprocessor took 46.58 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 179.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:50,957 INFO L168 Benchmark]: RCFGBuilder took 509.29 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 155.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:50,958 INFO L168 Benchmark]: TraceAbstraction took 39118.27 ms. Allocated memory was 202.9 MB in the beginning and 457.2 MB in the end (delta: 254.3 MB). Free memory was 155.1 MB in the beginning and 102.4 MB in the end (delta: 52.7 MB). Peak memory consumption was 307.0 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:50,960 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 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.49 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 181.4 MB in the end (delta: -78.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.58 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 179.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 509.29 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 155.1 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39118.27 ms. Allocated memory was 202.9 MB in the beginning and 457.2 MB in the end (delta: 254.3 MB). Free memory was 155.1 MB in the beginning and 102.4 MB in the end (delta: 52.7 MB). Peak memory consumption was 307.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38.7s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 29.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s 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: 0.0s 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...