/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:47:04,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:47:04,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:47:04,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:47:04,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:47:04,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:47:04,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:47:04,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:47:04,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:47:04,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:47:04,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:47:04,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:47:04,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:47:04,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:47:04,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:47:04,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:47:04,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:47:04,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:47:04,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:47:04,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:47:04,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:47:04,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:47:04,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:47:04,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:47:04,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:47:04,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:47:04,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:47:04,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:47:04,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:47:04,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:47:04,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:47:04,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:47:04,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:47:04,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:47:04,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:47:04,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:47:04,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:47:04,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:47:04,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:47:04,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:47:04,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:47:04,953 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 [2020-08-21 23:47:04,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:47:04,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:47:04,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:47:04,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:47:04,978 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:47:04,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:47:04,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:47:04,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:47:04,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:47:04,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:47:04,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:47:04,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:47:04,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:47:04,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:47:04,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:47:04,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:47:04,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:47:04,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:47:04,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:47:04,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:47:04,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:47:04,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:47:04,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:47:04,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:47:04,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:47:04,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:47:04,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:47:04,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:47:04,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:47:04,983 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:47:05,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:47:05,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:47:05,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:47:05,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:47:05,306 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:47:05,307 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-21 23:47:05,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27725c06b/3ce017ada01d4dc9a57578eb197b521b/FLAG455c350d7 [2020-08-21 23:47:05,854 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:47:05,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-21 23:47:05,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27725c06b/3ce017ada01d4dc9a57578eb197b521b/FLAG455c350d7 [2020-08-21 23:47:06,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27725c06b/3ce017ada01d4dc9a57578eb197b521b [2020-08-21 23:47:06,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:47:06,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:47:06,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:47:06,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:47:06,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:47:06,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144c4f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06, skipping insertion in model container [2020-08-21 23:47:06,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:47:06,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:47:06,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:47:06,427 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:47:06,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:47:06,460 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:47:06,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06 WrapperNode [2020-08-21 23:47:06,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:47:06,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:47:06,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:47:06,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:47:06,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (1/1) ... [2020-08-21 23:47:06,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:47:06,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:47:06,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:47:06,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:47:06,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (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 [2020-08-21 23:47:06,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:47:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:47:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 23:47:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 23:47:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:47:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 23:47:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:47:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 23:47:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 23:47:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:47:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:47:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:47:06,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:47:06,832 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 23:47:06,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:47:06 BoogieIcfgContainer [2020-08-21 23:47:06,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:47:06,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:47:06,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:47:06,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:47:06,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:47:06" (1/3) ... [2020-08-21 23:47:06,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:47:06, skipping insertion in model container [2020-08-21 23:47:06,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:47:06" (2/3) ... [2020-08-21 23:47:06,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:47:06, skipping insertion in model container [2020-08-21 23:47:06,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:47:06" (3/3) ... [2020-08-21 23:47:06,844 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-21 23:47:06,867 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:47:06,886 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:47:06,926 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:47:06,974 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:47:06,974 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:47:06,975 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:47:06,975 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:47:06,975 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:47:06,975 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:47:06,975 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:47:06,975 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:47:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 23:47:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 23:47:07,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:07,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:07,008 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:07,014 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-21 23:47:07,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:07,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879504453] [2020-08-21 23:47:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:47:07,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879504453] [2020-08-21 23:47:07,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:47:07,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:47:07,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319658522] [2020-08-21 23:47:07,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:47:07,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:47:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:47:07,299 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-21 23:47:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:07,375 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-21 23:47:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:47:07,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 23:47:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:07,388 INFO L225 Difference]: With dead ends: 40 [2020-08-21 23:47:07,388 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 23:47:07,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:47:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 23:47:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 23:47:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 23:47:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 23:47:07,437 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-21 23:47:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:07,438 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 23:47:07,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:47:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 23:47:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 23:47:07,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:07,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:07,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:47:07,442 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-21 23:47:07,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:07,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914059877] [2020-08-21 23:47:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:47:07,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914059877] [2020-08-21 23:47:07,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:47:07,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:47:07,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611612938] [2020-08-21 23:47:07,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:47:07,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:07,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:47:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:47:07,650 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-21 23:47:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:07,682 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 23:47:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:47:07,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 23:47:07,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:07,688 INFO L225 Difference]: With dead ends: 32 [2020-08-21 23:47:07,688 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 23:47:07,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:47:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 23:47:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 23:47:07,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 23:47:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 23:47:07,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-21 23:47:07,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:07,701 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 23:47:07,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:47:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 23:47:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 23:47:07,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:07,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:07,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:47:07,704 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:07,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-21 23:47:07,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:07,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340644380] [2020-08-21 23:47:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:47:07,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340644380] [2020-08-21 23:47:07,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:47:07,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:47:07,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060293462] [2020-08-21 23:47:07,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:47:07,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:47:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:47:07,892 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-21 23:47:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:07,957 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 23:47:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 23:47:07,958 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 23:47:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:07,960 INFO L225 Difference]: With dead ends: 48 [2020-08-21 23:47:07,960 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 23:47:07,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:47:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 23:47:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 23:47:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 23:47:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 23:47:07,969 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-21 23:47:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:07,970 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 23:47:07,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:47:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 23:47:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 23:47:07,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:07,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:07,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:47:07,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-21 23:47:07,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:07,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409329494] [2020-08-21 23:47:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 23:47:08,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409329494] [2020-08-21 23:47:08,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:47:08,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:47:08,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459939612] [2020-08-21 23:47:08,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:47:08,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:08,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:47:08,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:47:08,140 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-21 23:47:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:08,170 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 23:47:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:47:08,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 23:47:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:08,173 INFO L225 Difference]: With dead ends: 50 [2020-08-21 23:47:08,173 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 23:47:08,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:47:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 23:47:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-21 23:47:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 23:47:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-21 23:47:08,182 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-21 23:47:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:08,182 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-21 23:47:08,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:47:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-21 23:47:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 23:47:08,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:08,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:08,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:47:08,196 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-21 23:47:08,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:08,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850367832] [2020-08-21 23:47:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 23:47:08,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850367832] [2020-08-21 23:47:08,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:47:08,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:47:08,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971275754] [2020-08-21 23:47:08,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:47:08,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:08,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:47:08,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:47:08,420 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-21 23:47:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:08,541 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-21 23:47:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:47:08,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-21 23:47:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:08,543 INFO L225 Difference]: With dead ends: 64 [2020-08-21 23:47:08,544 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 23:47:08,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:47:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 23:47:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-21 23:47:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 23:47:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-21 23:47:08,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-21 23:47:08,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:08,552 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-21 23:47:08,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:47:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-21 23:47:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 23:47:08,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:08,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:08,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:47:08,555 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:08,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-21 23:47:08,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:08,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427282077] [2020-08-21 23:47:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 23:47:08,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427282077] [2020-08-21 23:47:08,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:47:08,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 23:47:08,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859777700] [2020-08-21 23:47:08,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 23:47:08,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:08,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 23:47:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:47:08,862 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-21 23:47:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:09,025 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-21 23:47:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:47:09,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-21 23:47:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:09,027 INFO L225 Difference]: With dead ends: 72 [2020-08-21 23:47:09,028 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 23:47:09,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:47:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 23:47:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-21 23:47:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 23:47:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-21 23:47:09,036 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-21 23:47:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:09,037 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-21 23:47:09,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 23:47:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-21 23:47:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 23:47:09,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:09,039 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:09,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:47:09,039 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-21 23:47:09,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:09,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076402928] [2020-08-21 23:47:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-21 23:47:09,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076402928] [2020-08-21 23:47:09,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:47:09,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 23:47:09,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613158565] [2020-08-21 23:47:09,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 23:47:09,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:09,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 23:47:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:47:09,440 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-21 23:47:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:09,658 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-21 23:47:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 23:47:09,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-21 23:47:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:09,663 INFO L225 Difference]: With dead ends: 80 [2020-08-21 23:47:09,663 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 23:47:09,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-21 23:47:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 23:47:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-21 23:47:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 23:47:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-21 23:47:09,671 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-21 23:47:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:09,672 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-21 23:47:09,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 23:47:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-21 23:47:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 23:47:09,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:09,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:09,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:47:09,677 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-21 23:47:09,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:09,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534510690] [2020-08-21 23:47:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:09,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 23:47:10,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534510690] [2020-08-21 23:47:10,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:47:10,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 23:47:10,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864112584] [2020-08-21 23:47:10,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 23:47:10,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:10,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 23:47:10,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 23:47:10,248 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-21 23:47:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:10,509 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-21 23:47:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 23:47:10,509 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-21 23:47:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:10,511 INFO L225 Difference]: With dead ends: 90 [2020-08-21 23:47:10,511 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 23:47:10,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:47:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 23:47:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-21 23:47:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 23:47:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-21 23:47:10,519 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-21 23:47:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:10,519 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-21 23:47:10,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 23:47:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-21 23:47:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 23:47:10,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:10,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:10,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:47:10,521 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-21 23:47:10,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:10,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862851514] [2020-08-21 23:47:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:10,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-21 23:47:11,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862851514] [2020-08-21 23:47:11,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:47:11,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 23:47:11,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687981854] [2020-08-21 23:47:11,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 23:47:11,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:11,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 23:47:11,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 23:47:11,060 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-21 23:47:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:11,339 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-21 23:47:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 23:47:11,339 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-21 23:47:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:11,340 INFO L225 Difference]: With dead ends: 94 [2020-08-21 23:47:11,340 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 23:47:11,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:47:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 23:47:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-21 23:47:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 23:47:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-21 23:47:11,349 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-21 23:47:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:11,349 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-21 23:47:11,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 23:47:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-21 23:47:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 23:47:11,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:47:11,351 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:47:11,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:47:11,351 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:47:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:47:11,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-21 23:47:11,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:47:11,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924065010] [2020-08-21 23:47:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:47:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:47:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:47:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:47:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:47:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-21 23:47:11,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924065010] [2020-08-21 23:47:11,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:47:11,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 23:47:11,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099339094] [2020-08-21 23:47:11,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 23:47:11,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:47:11,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 23:47:11,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 23:47:11,945 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-21 23:47:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:47:12,258 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-21 23:47:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 23:47:12,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-21 23:47:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:47:12,260 INFO L225 Difference]: With dead ends: 82 [2020-08-21 23:47:12,260 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 23:47:12,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:47:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 23:47:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 23:47:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 23:47:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 23:47:12,262 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-21 23:47:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:47:12,262 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 23:47:12,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 23:47:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 23:47:12,262 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 23:47:12,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:47:12,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 23:47:12,290 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 23:47:12,290 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:47:12,290 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 23:47:12,290 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-21 23:47:12,291 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-21 23:47:12,291 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-21 23:47:12,291 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-21 23:47:12,291 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-21 23:47:12,291 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-21 23:47:12,292 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 23:47:12,292 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 23:47:12,292 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 23:47:12,292 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 23:47:12,293 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-21 23:47:12,293 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-21 23:47:12,293 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-21 23:47:12,293 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-21 23:47:12,293 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-21 23:47:12,293 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-21 23:47:12,294 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 23:47:12,294 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-21 23:47:12,294 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-21 23:47:12,294 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-21 23:47:12,294 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-21 23:47:12,294 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-21 23:47:12,294 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 23:47:12,294 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 23:47:12,295 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-21 23:47:12,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:47:12 BoogieIcfgContainer [2020-08-21 23:47:12,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:47:12,303 INFO L168 Benchmark]: Toolchain (without parser) took 6099.67 ms. Allocated memory was 138.4 MB in the beginning and 288.9 MB in the end (delta: 150.5 MB). Free memory was 102.5 MB in the beginning and 242.2 MB in the end (delta: -139.7 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:47:12,304 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 23:47:12,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.32 ms. Allocated memory is still 138.4 MB. Free memory was 102.3 MB in the beginning and 92.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:47:12,306 INFO L168 Benchmark]: Boogie Preprocessor took 117.05 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 180.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 23:47:12,306 INFO L168 Benchmark]: RCFGBuilder took 254.30 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 23:47:12,307 INFO L168 Benchmark]: TraceAbstraction took 5463.70 ms. Allocated memory was 201.3 MB in the beginning and 288.9 MB in the end (delta: 87.6 MB). Free memory was 166.2 MB in the beginning and 242.2 MB in the end (delta: -76.0 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:47:12,310 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.32 ms. Allocated memory is still 138.4 MB. Free memory was 102.3 MB in the beginning and 92.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.05 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 180.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.30 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 166.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5463.70 ms. Allocated memory was 201.3 MB in the beginning and 288.9 MB in the end (delta: 87.6 MB). Free memory was 166.2 MB in the beginning and 242.2 MB in the end (delta: -76.0 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 58 SDslu, 3296 SDs, 0 SdLazy, 1115 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 337 ConstructedInterpolants, 0 QuantifiedInterpolants, 50267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 118/206 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...