/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=WIDEST --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 22:10:06,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:10:06,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:10:06,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:10:06,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:10:06,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:10:06,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:10:06,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:10:06,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:10:06,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:10:06,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:10:06,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:10:06,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:10:06,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:10:06,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:10:06,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:10:06,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:10:06,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:10:06,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:10:06,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:10:06,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:10:06,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:10:06,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:10:06,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:10:06,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:10:06,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:10:06,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:10:06,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:10:06,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:10:06,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:10:07,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:10:07,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:10:07,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:10:07,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:10:07,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:10:07,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:10:07,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:10:07,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:10:07,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:10:07,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:10:07,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:10:07,007 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 22:10:07,040 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:10:07,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:10:07,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:10:07,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:10:07,043 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:10:07,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:10:07,043 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:10:07,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:10:07,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:10:07,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:10:07,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:10:07,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:10:07,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:10:07,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:10:07,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:10:07,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:10:07,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:10:07,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:10:07,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:10:07,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:10:07,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:10:07,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:10:07,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:10:07,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:10:07,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:10:07,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:10:07,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:10:07,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:10:07,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:10:07,050 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:10:07,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:10:07,432 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:10:07,436 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:10:07,438 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:10:07,439 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:10:07,439 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-21 22:10:07,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6abeef1cf/92fb9df64e1646e28c19d25638929d3a/FLAG8be0d5339 [2020-08-21 22:10:08,022 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:10:08,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-21 22:10:08,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6abeef1cf/92fb9df64e1646e28c19d25638929d3a/FLAG8be0d5339 [2020-08-21 22:10:08,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6abeef1cf/92fb9df64e1646e28c19d25638929d3a [2020-08-21 22:10:08,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:10:08,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:10:08,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:08,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:10:08,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:10:08,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b8db4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08, skipping insertion in model container [2020-08-21 22:10:08,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:10:08,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:10:08,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:08,642 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:10:08,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:08,679 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:10:08,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08 WrapperNode [2020-08-21 22:10:08,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:08,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:10:08,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:10:08,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:10:08,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (1/1) ... [2020-08-21 22:10:08,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:10:08,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:10:08,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:10:08,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:10:08,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (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 22:10:08,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:10:08,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:10:08,886 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 22:10:08,887 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 22:10:08,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:10:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 22:10:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:10:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 22:10:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 22:10:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:10:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:10:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:10:09,089 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:10:09,090 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:10:09,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:09 BoogieIcfgContainer [2020-08-21 22:10:09,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:10:09,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:10:09,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:10:09,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:10:09,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:10:08" (1/3) ... [2020-08-21 22:10:09,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42102cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:09, skipping insertion in model container [2020-08-21 22:10:09,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:08" (2/3) ... [2020-08-21 22:10:09,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42102cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:09, skipping insertion in model container [2020-08-21 22:10:09,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:09" (3/3) ... [2020-08-21 22:10:09,104 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-21 22:10:09,115 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:10:09,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:10:09,174 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:10:09,228 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:10:09,228 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:10:09,228 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:10:09,228 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:10:09,229 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:10:09,229 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:10:09,229 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:10:09,229 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:10:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 22:10:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:10:09,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:09,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:09,259 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:09,264 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-21 22:10:09,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:09,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103783671] [2020-08-21 22:10:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:09,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:09,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:09,568 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 22:10:09,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103783671] [2020-08-21 22:10:09,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:09,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:10:09,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864924013] [2020-08-21 22:10:09,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:10:09,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:10:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:09,599 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-21 22:10:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:09,662 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-21 22:10:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:10:09,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:10:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:09,673 INFO L225 Difference]: With dead ends: 40 [2020-08-21 22:10:09,673 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 22:10:09,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 22:10:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 22:10:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 22:10:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 22:10:09,726 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-21 22:10:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:09,727 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 22:10:09,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:10:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 22:10:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:10:09,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:09,730 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 22:10:09,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:10:09,731 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-21 22:10:09,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:09,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132537543] [2020-08-21 22:10:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:09,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:09,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:09,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:09,921 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 22:10:09,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132537543] [2020-08-21 22:10:09,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:09,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:10:09,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464183868] [2020-08-21 22:10:09,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:10:09,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:10:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:09,926 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-21 22:10:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:09,947 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 22:10:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:10:09,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 22:10:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:09,949 INFO L225 Difference]: With dead ends: 32 [2020-08-21 22:10:09,950 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 22:10:09,951 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 22:10:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 22:10:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 22:10:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 22:10:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 22:10:09,960 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-21 22:10:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:09,960 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 22:10:09,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:10:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 22:10:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:10:09,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:09,962 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 22:10:09,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:10:09,963 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-21 22:10:09,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:09,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331506724] [2020-08-21 22:10:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,167 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 22:10:10,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331506724] [2020-08-21 22:10:10,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:10,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 22:10:10,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739881325] [2020-08-21 22:10:10,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:10:10,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:10:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:10:10,171 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-21 22:10:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:10,247 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 22:10:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:10:10,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 22:10:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:10,250 INFO L225 Difference]: With dead ends: 48 [2020-08-21 22:10:10,250 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 22:10:10,251 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 22:10:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 22:10:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 22:10:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:10:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 22:10:10,261 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-21 22:10:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:10,261 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 22:10:10,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:10:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 22:10:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:10:10,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:10,264 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 22:10:10,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:10:10,264 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-21 22:10:10,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:10,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525398341] [2020-08-21 22:10:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,480 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 22:10:10,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525398341] [2020-08-21 22:10:10,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:10,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:10:10,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832551475] [2020-08-21 22:10:10,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:10:10,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:10,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:10:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:10,487 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-21 22:10:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:10,530 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 22:10:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:10:10,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 22:10:10,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:10,534 INFO L225 Difference]: With dead ends: 50 [2020-08-21 22:10:10,535 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 22:10:10,538 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 22:10:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 22:10:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-21 22:10:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 22:10:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-21 22:10:10,559 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-21 22:10:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:10,578 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-21 22:10:10,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:10:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-21 22:10:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:10:10,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:10,583 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 22:10:10,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:10:10,585 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:10,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-21 22:10:10,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:10,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271543188] [2020-08-21 22:10:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:10,840 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 22:10:10,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271543188] [2020-08-21 22:10:10,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:10,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:10:10,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88751810] [2020-08-21 22:10:10,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:10:10,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:10:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:10:10,844 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-21 22:10:10,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:10,952 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-21 22:10:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:10:10,953 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-21 22:10:10,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:10,954 INFO L225 Difference]: With dead ends: 64 [2020-08-21 22:10:10,955 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 22:10:10,956 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 22:10:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 22:10:10,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-21 22:10:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 22:10:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-21 22:10:10,964 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-21 22:10:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:10,964 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-21 22:10:10,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:10:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-21 22:10:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 22:10:10,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:10,966 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 22:10:10,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:10:10,967 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-21 22:10:10,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:10,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427425515] [2020-08-21 22:10:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,321 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 22:10:11,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427425515] [2020-08-21 22:10:11,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:11,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:10:11,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237906917] [2020-08-21 22:10:11,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:10:11,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:10:11,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:10:11,323 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-21 22:10:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:11,467 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-21 22:10:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:10:11,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-21 22:10:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:11,469 INFO L225 Difference]: With dead ends: 72 [2020-08-21 22:10:11,470 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 22:10:11,471 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 22:10:11,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 22:10:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-21 22:10:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 22:10:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-21 22:10:11,478 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-21 22:10:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:11,479 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-21 22:10:11,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:10:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-21 22:10:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 22:10:11,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:11,481 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 22:10:11,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:10:11,482 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:11,482 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-21 22:10:11,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:11,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45666606] [2020-08-21 22:10:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:11,854 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 22:10:11,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45666606] [2020-08-21 22:10:11,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:11,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 22:10:11,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153013676] [2020-08-21 22:10:11,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 22:10:11,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:11,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 22:10:11,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:10:11,857 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-21 22:10:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:12,069 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-21 22:10:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 22:10:12,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-21 22:10:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:12,072 INFO L225 Difference]: With dead ends: 80 [2020-08-21 22:10:12,072 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 22:10:12,073 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 22:10:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 22:10:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-21 22:10:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 22:10:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-21 22:10:12,080 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-21 22:10:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:12,081 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-21 22:10:12,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 22:10:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-21 22:10:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 22:10:12,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:12,083 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 22:10:12,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:10:12,084 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-21 22:10:12,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:12,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980234050] [2020-08-21 22:10:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:12,560 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 22:10:12,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980234050] [2020-08-21 22:10:12,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:12,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:10:12,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89283455] [2020-08-21 22:10:12,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:10:12,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:10:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:10:12,563 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-21 22:10:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:12,888 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-21 22:10:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:10:12,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-21 22:10:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:12,891 INFO L225 Difference]: With dead ends: 90 [2020-08-21 22:10:12,891 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 22:10:12,894 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 22:10:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 22:10:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-21 22:10:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 22:10:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-21 22:10:12,912 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-21 22:10:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:12,913 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-21 22:10:12,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:10:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-21 22:10:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:10:12,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:12,918 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 22:10:12,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:10:12,921 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:12,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-21 22:10:12,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:12,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960846991] [2020-08-21 22:10:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,536 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 22:10:13,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960846991] [2020-08-21 22:10:13,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:13,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:10:13,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662334098] [2020-08-21 22:10:13,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:10:13,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:13,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:10:13,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:10:13,559 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-21 22:10:13,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:13,841 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-21 22:10:13,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:10:13,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-21 22:10:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:13,843 INFO L225 Difference]: With dead ends: 94 [2020-08-21 22:10:13,843 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 22:10:13,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 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 22:10:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 22:10:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-21 22:10:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 22:10:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-21 22:10:13,868 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-21 22:10:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:13,872 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-21 22:10:13,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:10:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-21 22:10:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 22:10:13,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:13,875 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 22:10:13,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:10:13,876 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-21 22:10:13,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:13,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778046772] [2020-08-21 22:10:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:14,492 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 22:10:14,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778046772] [2020-08-21 22:10:14,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:14,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:10:14,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007460412] [2020-08-21 22:10:14,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:10:14,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:10:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:10:14,497 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-21 22:10:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:14,823 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-21 22:10:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:10:14,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-21 22:10:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:14,824 INFO L225 Difference]: With dead ends: 82 [2020-08-21 22:10:14,824 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:10:14,826 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 22:10:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:10:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:10:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:10:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:10:14,827 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-21 22:10:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:14,827 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:10:14,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:10:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:10:14,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:10:14,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:10:14,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:10:14,864 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:10:14,864 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:10:14,864 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 22:10:14,865 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-21 22:10:14,865 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-21 22:10:14,865 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-21 22:10:14,865 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-21 22:10:14,865 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-21 22:10:14,865 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-21 22:10:14,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:10:14,868 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:10:14,868 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:10:14,868 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:10:14,868 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-21 22:10:14,868 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-21 22:10:14,868 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-21 22:10:14,869 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-21 22:10:14,869 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-21 22:10:14,869 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-21 22:10:14,869 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 22:10:14,869 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-21 22:10:14,869 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-21 22:10:14,869 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-21 22:10:14,870 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-21 22:10:14,870 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-21 22:10:14,870 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 22:10:14,870 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 22:10:14,870 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-21 22:10:14,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:10:14 BoogieIcfgContainer [2020-08-21 22:10:14,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:10:14,886 INFO L168 Benchmark]: Toolchain (without parser) took 6500.63 ms. Allocated memory was 138.4 MB in the beginning and 290.5 MB in the end (delta: 152.0 MB). Free memory was 101.7 MB in the beginning and 246.7 MB in the end (delta: -145.0 MB). Peak memory consumption was 7.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:14,886 INFO L168 Benchmark]: CDTParser took 0.25 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 22:10:14,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.91 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:14,890 INFO L168 Benchmark]: Boogie Preprocessor took 118.81 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.9 MB in the beginning and 179.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:14,893 INFO L168 Benchmark]: RCFGBuilder took 294.83 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 166.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:14,894 INFO L168 Benchmark]: TraceAbstraction took 5786.20 ms. Allocated memory was 200.3 MB in the beginning and 290.5 MB in the end (delta: 90.2 MB). Free memory was 165.5 MB in the beginning and 246.7 MB in the end (delta: -81.2 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:14,902 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 294.91 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 91.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.81 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.9 MB in the beginning and 179.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.83 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 166.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5786.20 ms. Allocated memory was 200.3 MB in the beginning and 290.5 MB in the end (delta: 90.2 MB). Free memory was 165.5 MB in the beginning and 246.7 MB in the end (delta: -81.2 MB). Peak memory consumption was 9.0 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: 5.6s, 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: 0.1s 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, 0.2s SatisfiabilityAnalysisTime, 3.2s 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...