/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/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:47:07,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:47:07,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:47:07,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:47:07,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:47:07,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:47:07,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:47:07,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:47:07,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:47:07,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:47:07,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:47:07,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:47:07,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:47:07,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:47:07,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:47:07,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:47:07,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:47:07,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:47:07,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:47:07,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:47:07,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:47:07,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:47:07,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:47:07,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:47:07,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:47:07,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:47:07,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:47:07,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:47:07,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:47:07,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:47:07,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:47:07,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:47:07,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:47:07,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:47:07,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:47:07,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:47:07,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:47:07,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:47:07,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:47:07,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:47:07,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:47:07,826 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 04:47:07,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:47:07,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:47:07,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:47:07,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:47:07,871 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:47:07,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:47:07,871 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:47:07,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:47:07,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:47:07,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:47:07,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:47:07,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:47:07,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:47:07,873 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:47:07,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:47:07,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:47:07,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:47:07,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:47:07,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:47:07,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:47:07,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:47:07,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:47:07,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:47:07,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:47:07,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:47:07,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:47:07,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:47:07,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:47:07,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:47:07,876 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 04:47:08,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:47:08,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:47:08,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:47:08,220 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:47:08,221 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:47:08,221 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-22 04:47:08,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac5270bc9/01d4794e8dbb471c80a842877a24b9e1/FLAG2e6b6db27 [2020-08-22 04:47:08,761 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:47:08,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-22 04:47:08,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac5270bc9/01d4794e8dbb471c80a842877a24b9e1/FLAG2e6b6db27 [2020-08-22 04:47:09,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac5270bc9/01d4794e8dbb471c80a842877a24b9e1 [2020-08-22 04:47:09,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:47:09,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:47:09,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:47:09,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:47:09,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:47:09,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09, skipping insertion in model container [2020-08-22 04:47:09,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:47:09,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:47:09,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:47:09,359 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:47:09,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:47:09,392 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:47:09,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09 WrapperNode [2020-08-22 04:47:09,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:47:09,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:47:09,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:47:09,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:47:09,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (1/1) ... [2020-08-22 04:47:09,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:47:09,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:47:09,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:47:09,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:47:09,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (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 04:47:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:47:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:47:09,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 04:47:09,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:47:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:47:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:47:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 04:47:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:47:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 04:47:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 04:47:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 04:47:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 04:47:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:47:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:47:09,826 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:47:09,827 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 04:47:09,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:47:09 BoogieIcfgContainer [2020-08-22 04:47:09,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:47:09,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:47:09,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:47:09,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:47:09,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:47:09" (1/3) ... [2020-08-22 04:47:09,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481e03e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:47:09, skipping insertion in model container [2020-08-22 04:47:09,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:47:09" (2/3) ... [2020-08-22 04:47:09,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481e03e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:47:09, skipping insertion in model container [2020-08-22 04:47:09,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:47:09" (3/3) ... [2020-08-22 04:47:09,856 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-08-22 04:47:09,868 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:47:09,876 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:47:09,899 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:47:09,919 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:47:09,919 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:47:09,919 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:47:09,919 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:47:09,919 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:47:09,919 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:47:09,919 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:47:09,920 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:47:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-22 04:47:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 04:47:09,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:09,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:09,944 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:09,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:09,950 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-08-22 04:47:09,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:09,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226030475] [2020-08-22 04:47:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,139 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 04:47:10,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226030475] [2020-08-22 04:47:10,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:47:10,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:47:10,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322044991] [2020-08-22 04:47:10,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:47:10,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:10,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:47:10,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:47:10,161 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-22 04:47:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:10,262 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-08-22 04:47:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:47:10,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-22 04:47:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:10,272 INFO L225 Difference]: With dead ends: 42 [2020-08-22 04:47:10,272 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 04:47:10,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:47:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 04:47:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 04:47:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 04:47:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-22 04:47:10,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-08-22 04:47:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:10,311 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-22 04:47:10,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:47:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-22 04:47:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 04:47:10,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:10,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:10,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:47:10,314 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-08-22 04:47:10,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:10,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092414553] [2020-08-22 04:47:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,394 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 04:47:10,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092414553] [2020-08-22 04:47:10,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:47:10,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:47:10,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752041541] [2020-08-22 04:47:10,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:47:10,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:47:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:47:10,398 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-08-22 04:47:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:10,467 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-22 04:47:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:47:10,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 04:47:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:10,470 INFO L225 Difference]: With dead ends: 35 [2020-08-22 04:47:10,471 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 04:47:10,472 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 04:47:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 04:47:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-22 04:47:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 04:47:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-22 04:47:10,480 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-08-22 04:47:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:10,481 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-22 04:47:10,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:47:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-22 04:47:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 04:47:10,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:10,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:10,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:47:10,483 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-08-22 04:47:10,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:10,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256677814] [2020-08-22 04:47:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,574 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 04:47:10,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256677814] [2020-08-22 04:47:10,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:10,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 04:47:10,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597661227] [2020-08-22 04:47:10,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:47:10,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:10,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:47:10,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:47:10,577 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-22 04:47:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:10,665 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-08-22 04:47:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:47:10,666 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 04:47:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:10,667 INFO L225 Difference]: With dead ends: 45 [2020-08-22 04:47:10,667 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 04:47:10,668 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 04:47:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 04:47:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-08-22 04:47:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 04:47:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 04:47:10,676 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-08-22 04:47:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:10,676 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 04:47:10,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:47:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 04:47:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 04:47:10,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:10,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:10,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:47:10,678 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:10,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-08-22 04:47:10,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:10,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709606638] [2020-08-22 04:47:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:10,804 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 04:47:10,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709606638] [2020-08-22 04:47:10,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:10,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:47:10,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359344452] [2020-08-22 04:47:10,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:47:10,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:10,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:47:10,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:47:10,812 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-22 04:47:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:10,924 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-08-22 04:47:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:47:10,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-22 04:47:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:10,926 INFO L225 Difference]: With dead ends: 56 [2020-08-22 04:47:10,926 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 04:47:10,927 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 04:47:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 04:47:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-08-22 04:47:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 04:47:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-08-22 04:47:10,935 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-08-22 04:47:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:10,935 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-08-22 04:47:10,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:47:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-08-22 04:47:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:47:10,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:10,937 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:10,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:47:10,937 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:10,938 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-08-22 04:47:10,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:10,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475891073] [2020-08-22 04:47:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,039 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 04:47:11,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475891073] [2020-08-22 04:47:11,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:11,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:47:11,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227266188] [2020-08-22 04:47:11,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:47:11,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:47:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:47:11,042 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-08-22 04:47:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:11,143 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-22 04:47:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:47:11,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 04:47:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:11,145 INFO L225 Difference]: With dead ends: 67 [2020-08-22 04:47:11,145 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 04:47:11,146 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 04:47:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 04:47:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-22 04:47:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 04:47:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-22 04:47:11,154 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-08-22 04:47:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:11,155 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-22 04:47:11,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:47:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-22 04:47:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:47:11,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:11,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:11,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:47:11,157 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:11,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:11,157 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-08-22 04:47:11,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:11,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434834711] [2020-08-22 04:47:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,253 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 04:47:11,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434834711] [2020-08-22 04:47:11,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:47:11,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 04:47:11,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402714907] [2020-08-22 04:47:11,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:47:11,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:47:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:47:11,256 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-08-22 04:47:11,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:11,357 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-08-22 04:47:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:47:11,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 04:47:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:11,360 INFO L225 Difference]: With dead ends: 45 [2020-08-22 04:47:11,360 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 04:47:11,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 04:47:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 04:47:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-22 04:47:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 04:47:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-22 04:47:11,368 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-08-22 04:47:11,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:11,368 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-22 04:47:11,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:47:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-22 04:47:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:47:11,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:11,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:11,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:47:11,370 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-08-22 04:47:11,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:11,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584971592] [2020-08-22 04:47:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:11,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584971592] [2020-08-22 04:47:11,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:11,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:47:11,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286279073] [2020-08-22 04:47:11,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:47:11,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:47:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:47:11,466 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-08-22 04:47:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:11,571 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-08-22 04:47:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:47:11,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-22 04:47:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:11,573 INFO L225 Difference]: With dead ends: 77 [2020-08-22 04:47:11,573 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 04:47:11,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:47:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 04:47:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-22 04:47:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 04:47:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-22 04:47:11,581 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-08-22 04:47:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:11,581 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-22 04:47:11,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:47:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-22 04:47:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 04:47:11,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:11,583 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:11,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:47:11,583 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-08-22 04:47:11,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:11,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144961922] [2020-08-22 04:47:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:11,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144961922] [2020-08-22 04:47:11,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:11,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:47:11,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222711738] [2020-08-22 04:47:11,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:47:11,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:47:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:47:11,674 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-08-22 04:47:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:11,793 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-22 04:47:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:47:11,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-22 04:47:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:11,795 INFO L225 Difference]: With dead ends: 88 [2020-08-22 04:47:11,795 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 04:47:11,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:47:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 04:47:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-08-22 04:47:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 04:47:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-08-22 04:47:11,807 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-08-22 04:47:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:11,809 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-08-22 04:47:11,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:47:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-08-22 04:47:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 04:47:11,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:11,811 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:11,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:47:11,811 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:11,811 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-08-22 04:47:11,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:11,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888665139] [2020-08-22 04:47:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:11,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888665139] [2020-08-22 04:47:11,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:11,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:47:11,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817701619] [2020-08-22 04:47:11,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:47:11,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:47:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:47:11,968 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-08-22 04:47:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:12,112 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-08-22 04:47:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:47:12,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-22 04:47:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:12,113 INFO L225 Difference]: With dead ends: 99 [2020-08-22 04:47:12,114 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 04:47:12,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:47:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 04:47:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-08-22 04:47:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 04:47:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-08-22 04:47:12,122 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-08-22 04:47:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:12,122 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-08-22 04:47:12,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:47:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-08-22 04:47:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 04:47:12,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:12,124 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:12,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:47:12,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-08-22 04:47:12,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:12,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566851942] [2020-08-22 04:47:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:12,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:12,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566851942] [2020-08-22 04:47:12,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:12,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:47:12,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610228207] [2020-08-22 04:47:12,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:47:12,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:47:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:47:12,233 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2020-08-22 04:47:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:12,359 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-08-22 04:47:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:47:12,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-22 04:47:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:12,361 INFO L225 Difference]: With dead ends: 110 [2020-08-22 04:47:12,361 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 04:47:12,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:47:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 04:47:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-08-22 04:47:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 04:47:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-08-22 04:47:12,369 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-08-22 04:47:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:12,369 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-08-22 04:47:12,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:47:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-08-22 04:47:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 04:47:12,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:12,371 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:12,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:47:12,371 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-08-22 04:47:12,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:12,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408351401] [2020-08-22 04:47:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:12,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:12,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408351401] [2020-08-22 04:47:12,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:12,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:47:12,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340006602] [2020-08-22 04:47:12,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:47:12,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:12,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:47:12,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:47:12,507 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 12 states. [2020-08-22 04:47:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:12,642 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-08-22 04:47:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:47:12,642 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-22 04:47:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:12,643 INFO L225 Difference]: With dead ends: 121 [2020-08-22 04:47:12,643 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 04:47:12,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:47:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 04:47:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-08-22 04:47:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-22 04:47:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-22 04:47:12,653 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-08-22 04:47:12,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:12,653 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-22 04:47:12,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:47:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-22 04:47:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 04:47:12,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:12,655 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:12,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:47:12,655 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:12,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:12,656 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-08-22 04:47:12,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:12,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510565021] [2020-08-22 04:47:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:12,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:12,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510565021] [2020-08-22 04:47:12,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:12,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:47:12,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428378422] [2020-08-22 04:47:12,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:47:12,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:12,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:47:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:47:12,783 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 13 states. [2020-08-22 04:47:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:12,946 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-08-22 04:47:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:47:12,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-22 04:47:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:12,949 INFO L225 Difference]: With dead ends: 132 [2020-08-22 04:47:12,949 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 04:47:12,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:47:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 04:47:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-08-22 04:47:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 04:47:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-22 04:47:12,957 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-08-22 04:47:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:12,957 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-22 04:47:12,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:47:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-22 04:47:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 04:47:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:12,958 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:12,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:47:12,959 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-08-22 04:47:12,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:12,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348937412] [2020-08-22 04:47:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:13,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348937412] [2020-08-22 04:47:13,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:13,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:47:13,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204873087] [2020-08-22 04:47:13,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:47:13,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:13,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:47:13,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:47:13,103 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 14 states. [2020-08-22 04:47:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:13,273 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-08-22 04:47:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 04:47:13,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-22 04:47:13,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:13,281 INFO L225 Difference]: With dead ends: 143 [2020-08-22 04:47:13,281 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 04:47:13,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:47:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 04:47:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-08-22 04:47:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 04:47:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-08-22 04:47:13,289 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-08-22 04:47:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:13,289 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-08-22 04:47:13,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:47:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-08-22 04:47:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 04:47:13,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:13,290 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:13,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:47:13,291 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-08-22 04:47:13,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:13,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254004276] [2020-08-22 04:47:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:47:13,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254004276] [2020-08-22 04:47:13,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:13,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 04:47:13,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933584824] [2020-08-22 04:47:13,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 04:47:13,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:13,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 04:47:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:47:13,450 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 15 states. [2020-08-22 04:47:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:13,610 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-08-22 04:47:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:47:13,611 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-22 04:47:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:13,611 INFO L225 Difference]: With dead ends: 154 [2020-08-22 04:47:13,612 INFO L226 Difference]: Without dead ends: 101 [2020-08-22 04:47:13,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:47:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-22 04:47:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-08-22 04:47:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 04:47:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-08-22 04:47:13,626 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-08-22 04:47:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:13,627 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-08-22 04:47:13,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 04:47:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-08-22 04:47:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 04:47:13,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:13,628 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:13,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:47:13,628 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-08-22 04:47:13,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:13,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255436808] [2020-08-22 04:47:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-22 04:47:13,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255436808] [2020-08-22 04:47:13,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:13,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:47:13,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399958382] [2020-08-22 04:47:13,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:47:13,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:13,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:47:13,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:47:13,738 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 7 states. [2020-08-22 04:47:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:13,811 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-08-22 04:47:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:47:13,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-22 04:47:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:13,813 INFO L225 Difference]: With dead ends: 93 [2020-08-22 04:47:13,813 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 04:47:13,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:47:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 04:47:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-08-22 04:47:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 04:47:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-08-22 04:47:13,825 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 42 [2020-08-22 04:47:13,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:13,826 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-08-22 04:47:13,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:47:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-08-22 04:47:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 04:47:13,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:13,827 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:13,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:47:13,827 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1325635667, now seen corresponding path program 10 times [2020-08-22 04:47:13,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:13,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751135217] [2020-08-22 04:47:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-08-22 04:47:13,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751135217] [2020-08-22 04:47:13,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:47:13,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 04:47:13,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942846438] [2020-08-22 04:47:13,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:47:13,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:13,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:47:13,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:47:13,920 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 7 states. [2020-08-22 04:47:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:13,988 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-08-22 04:47:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:47:13,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-08-22 04:47:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:13,989 INFO L225 Difference]: With dead ends: 88 [2020-08-22 04:47:13,989 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:47:13,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:47:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:47:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:47:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:47:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:47:13,990 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-08-22 04:47:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:13,991 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:47:13,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:47:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:47:13,991 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:47:13,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:47:13,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:47:14,059 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:47:14,060 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 04:47:14,060 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:47:14,060 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:47:14,060 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:47:14,061 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:47:14,061 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:47:14,061 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-08-22 04:47:14,061 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-08-22 04:47:14,061 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-08-22 04:47:14,061 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-22 04:47:14,062 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-08-22 04:47:14,062 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-22 04:47:14,062 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-08-22 04:47:14,062 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-08-22 04:47:14,062 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-08-22 04:47:14,062 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 04:47:14,062 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-22 04:47:14,063 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-22 04:47:14,063 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 04:47:14,063 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:47:14,063 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 04:47:14,063 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-22 04:47:14,063 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-22 04:47:14,063 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-22 04:47:14,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:47:14 BoogieIcfgContainer [2020-08-22 04:47:14,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:47:14,085 INFO L168 Benchmark]: Toolchain (without parser) took 4913.60 ms. Allocated memory was 148.4 MB in the beginning and 274.2 MB in the end (delta: 125.8 MB). Free memory was 103.4 MB in the beginning and 193.9 MB in the end (delta: -90.6 MB). Peak memory consumption was 35.3 MB. Max. memory is 7.1 GB. [2020-08-22 04:47:14,086 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-22 04:47:14,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.00 ms. Allocated memory is still 148.4 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:47:14,088 INFO L168 Benchmark]: Boogie Preprocessor took 121.42 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 182.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:47:14,088 INFO L168 Benchmark]: RCFGBuilder took 316.80 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 167.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-22 04:47:14,089 INFO L168 Benchmark]: TraceAbstraction took 4238.00 ms. Allocated memory was 203.9 MB in the beginning and 274.2 MB in the end (delta: 70.3 MB). Free memory was 166.5 MB in the beginning and 193.9 MB in the end (delta: -27.4 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:47:14,093 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 222.00 ms. Allocated memory is still 148.4 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.42 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 93.3 MB in the beginning and 182.0 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.80 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 167.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4238.00 ms. Allocated memory was 203.9 MB in the beginning and 274.2 MB in the end (delta: 70.3 MB). Free memory was 166.5 MB in the beginning and 193.9 MB in the end (delta: -27.4 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 17]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 16, TraceHistogramMax: 12, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 505 SDslu, 593 SDs, 0 SdLazy, 1177 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 94 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 51 NumberOfFragments, 23 HoareAnnotationTreeSize, 23 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 455 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 439 ConstructedInterpolants, 0 QuantifiedInterpolants, 28428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 328/836 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...