/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:38:57,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:38:57,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:38:57,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:38:57,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:38:57,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:38:57,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:38:57,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:38:57,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:38:57,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:38:57,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:38:57,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:38:57,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:38:57,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:38:57,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:38:57,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:38:57,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:38:57,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:38:57,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:38:57,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:38:57,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:38:57,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:38:57,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:38:57,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:38:57,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:38:57,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:38:57,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:38:57,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:38:57,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:38:57,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:38:57,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:38:57,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:38:57,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:38:57,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:38:57,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:38:57,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:38:57,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:38:57,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:38:57,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:38:57,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:38:57,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:38:57,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 04:38:57,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:38:57,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:38:57,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:38:57,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:38:57,865 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:38:57,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:38:57,866 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:38:57,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:38:57,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:38:57,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:38:57,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:38:57,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:38:57,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:38:57,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:38:57,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:38:57,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:38:57,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:38:57,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:38:57,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:38:57,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:38:57,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:38:57,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:38:57,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:38:57,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:38:57,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:38:57,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:38:57,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:38:57,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:38:57,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:38:57,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:38:58,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:38:58,191 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:38:58,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:38:58,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:38:58,198 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:38:58,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-22 04:38:58,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd630cf5e/86ddee8713994ec49cf21a85aeac7f3b/FLAG75ac26c28 [2020-08-22 04:38:58,745 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:38:58,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-22 04:38:58,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd630cf5e/86ddee8713994ec49cf21a85aeac7f3b/FLAG75ac26c28 [2020-08-22 04:38:59,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd630cf5e/86ddee8713994ec49cf21a85aeac7f3b [2020-08-22 04:38:59,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:38:59,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:38:59,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:38:59,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:38:59,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:38:59,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fec7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59, skipping insertion in model container [2020-08-22 04:38:59,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:38:59,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:38:59,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:38:59,399 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:38:59,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:38:59,433 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:38:59,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59 WrapperNode [2020-08-22 04:38:59,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:38:59,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:38:59,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:38:59,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:38:59,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... [2020-08-22 04:38:59,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:38:59,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:38:59,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:38:59,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:38:59,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:38:59,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:38:59,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:38:59,627 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 04:38:59,627 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 04:38:59,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:38:59,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 04:38:59,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:38:59,627 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 04:38:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 04:38:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:38:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:38:59,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:38:59,812 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:38:59,812 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 04:38:59,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:59 BoogieIcfgContainer [2020-08-22 04:38:59,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:38:59,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:38:59,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:38:59,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:38:59,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:38:59" (1/3) ... [2020-08-22 04:38:59,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7bad61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:59, skipping insertion in model container [2020-08-22 04:38:59,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:59" (2/3) ... [2020-08-22 04:38:59,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7bad61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:59, skipping insertion in model container [2020-08-22 04:38:59,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:59" (3/3) ... [2020-08-22 04:38:59,825 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-22 04:38:59,837 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:38:59,845 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:38:59,861 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:38:59,910 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:38:59,911 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:38:59,911 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:38:59,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:38:59,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:38:59,912 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:38:59,912 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:38:59,912 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:38:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-22 04:38:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 04:38:59,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:59,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:59,974 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-22 04:38:59,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:59,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903710101] [2020-08-22 04:38:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:00,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903710101] [2020-08-22 04:39:00,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:00,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:39:00,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899021226] [2020-08-22 04:39:00,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:39:00,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:00,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:39:00,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:39:00,395 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-22 04:39:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:00,496 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-22 04:39:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:39:00,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 04:39:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:00,517 INFO L225 Difference]: With dead ends: 40 [2020-08-22 04:39:00,518 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 04:39:00,522 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 [2020-08-22 04:39:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 04:39:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-22 04:39:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 04:39:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-22 04:39:00,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-22 04:39:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:00,605 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-22 04:39:00,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:39:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-22 04:39:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:39:00,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:00,609 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] [2020-08-22 04:39:00,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:39:00,611 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-22 04:39:00,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:00,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309923332] [2020-08-22 04:39:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:00,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309923332] [2020-08-22 04:39:00,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:00,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:39:00,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490606732] [2020-08-22 04:39:00,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:39:00,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:39:00,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:39:00,810 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-22 04:39:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:00,827 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-22 04:39:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:39:00,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 04:39:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:00,830 INFO L225 Difference]: With dead ends: 32 [2020-08-22 04:39:00,830 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 04:39:00,831 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 [2020-08-22 04:39:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 04:39:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-22 04:39:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 04:39:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-22 04:39:00,839 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-22 04:39:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:00,840 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-22 04:39:00,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:39:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-22 04:39:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:39:00,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:00,842 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] [2020-08-22 04:39:00,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:39:00,843 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-22 04:39:00,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:00,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997799047] [2020-08-22 04:39:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:00,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:01,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997799047] [2020-08-22 04:39:01,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:01,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 04:39:01,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250071429] [2020-08-22 04:39:01,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:39:01,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:39:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:39:01,045 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-22 04:39:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:01,112 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-22 04:39:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:39:01,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-22 04:39:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:01,115 INFO L225 Difference]: With dead ends: 48 [2020-08-22 04:39:01,115 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 04:39:01,116 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 [2020-08-22 04:39:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 04:39:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 04:39:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 04:39:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-22 04:39:01,124 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-22 04:39:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:01,125 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-22 04:39:01,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:39:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-22 04:39:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:39:01,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:01,127 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] [2020-08-22 04:39:01,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:39:01,128 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-22 04:39:01,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:01,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468554341] [2020-08-22 04:39:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:39:01,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468554341] [2020-08-22 04:39:01,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:01,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:39:01,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742085674] [2020-08-22 04:39:01,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:39:01,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:01,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:39:01,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:39:01,337 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-22 04:39:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:01,375 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-22 04:39:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:39:01,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-22 04:39:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:01,378 INFO L225 Difference]: With dead ends: 50 [2020-08-22 04:39:01,379 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 04:39:01,380 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 [2020-08-22 04:39:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 04:39:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-22 04:39:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 04:39:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-22 04:39:01,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-22 04:39:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:01,388 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-22 04:39:01,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:39:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-22 04:39:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:39:01,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:01,390 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] [2020-08-22 04:39:01,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:39:01,391 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-22 04:39:01,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:01,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085372895] [2020-08-22 04:39:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:39:01,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085372895] [2020-08-22 04:39:01,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:01,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:39:01,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227266188] [2020-08-22 04:39:01,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:39:01,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:01,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:39:01,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:39:01,615 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-22 04:39:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:01,738 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-22 04:39:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:39:01,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-22 04:39:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:01,740 INFO L225 Difference]: With dead ends: 64 [2020-08-22 04:39:01,741 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 04:39:01,742 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 [2020-08-22 04:39:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 04:39:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-22 04:39:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 04:39:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-22 04:39:01,750 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-22 04:39:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:01,750 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-22 04:39:01,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:39:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-22 04:39:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 04:39:01,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:01,752 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] [2020-08-22 04:39:01,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:39:01,753 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-22 04:39:01,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:01,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895781016] [2020-08-22 04:39:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:39:02,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895781016] [2020-08-22 04:39:02,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:02,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:39:02,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175344718] [2020-08-22 04:39:02,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:39:02,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:02,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:39:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:39:02,046 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-22 04:39:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:02,214 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-08-22 04:39:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:39:02,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-22 04:39:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:02,217 INFO L225 Difference]: With dead ends: 74 [2020-08-22 04:39:02,217 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 04:39:02,218 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 [2020-08-22 04:39:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 04:39:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-08-22 04:39:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 04:39:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-22 04:39:02,227 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-22 04:39:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:02,228 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-22 04:39:02,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:39:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-22 04:39:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 04:39:02,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:02,230 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] [2020-08-22 04:39:02,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:39:02,231 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-22 04:39:02,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:02,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814149138] [2020-08-22 04:39:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 04:39:02,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814149138] [2020-08-22 04:39:02,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:02,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:39:02,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736142980] [2020-08-22 04:39:02,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:39:02,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:39:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:39:02,572 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 14 states. [2020-08-22 04:39:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:02,728 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-08-22 04:39:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:39:02,729 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-22 04:39:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:02,730 INFO L225 Difference]: With dead ends: 78 [2020-08-22 04:39:02,730 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 04:39:02,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:39:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 04:39:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-22 04:39:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 04:39:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-08-22 04:39:02,739 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2020-08-22 04:39:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:02,739 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-08-22 04:39:02,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:39:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-08-22 04:39:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 04:39:02,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:02,741 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] [2020-08-22 04:39:02,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:39:02,742 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-22 04:39:02,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:02,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696450933] [2020-08-22 04:39:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:02,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:03,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 04:39:03,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696450933] [2020-08-22 04:39:03,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:03,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:39:03,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407803558] [2020-08-22 04:39:03,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:39:03,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:39:03,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:39:03,046 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2020-08-22 04:39:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:03,208 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-08-22 04:39:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:39:03,209 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-22 04:39:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:03,209 INFO L225 Difference]: With dead ends: 66 [2020-08-22 04:39:03,209 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:39:03,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:39:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:39:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:39:03,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:39:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:39:03,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-08-22 04:39:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:03,212 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:39:03,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:39:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:39:03,213 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:39:03,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:39:03,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:39:03,237 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 04:39:03,237 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:39:03,237 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-22 04:39:03,237 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 04:39:03,237 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-22 04:39:03,237 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-22 04:39:03,238 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-22 04:39:03,238 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-22 04:39:03,238 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-22 04:39:03,238 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:39:03,238 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:39:03,238 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:39:03,238 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:39:03,239 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-22 04:39:03,239 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-22 04:39:03,239 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-22 04:39:03,239 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-22 04:39:03,239 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-22 04:39:03,239 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-22 04:39:03,240 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-22 04:39:03,240 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-22 04:39:03,240 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-22 04:39:03,240 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-22 04:39:03,240 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-22 04:39:03,240 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-22 04:39:03,240 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-22 04:39:03,241 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-22 04:39:03,241 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-22 04:39:03,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:39:03 BoogieIcfgContainer [2020-08-22 04:39:03,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:39:03,250 INFO L168 Benchmark]: Toolchain (without parser) took 4086.67 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 102.4 MB in the beginning and 98.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:03,251 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 04:39:03,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.36 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:03,253 INFO L168 Benchmark]: Boogie Preprocessor took 115.57 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 180.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:03,254 INFO L168 Benchmark]: RCFGBuilder took 265.54 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 167.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:03,255 INFO L168 Benchmark]: TraceAbstraction took 3429.68 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 167.1 MB in the beginning and 98.3 MB in the end (delta: 68.9 MB). Peak memory consumption was 112.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:03,258 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.36 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.57 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 180.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 265.54 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 167.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3429.68 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 167.1 MB in the beginning and 98.3 MB in the end (delta: 68.9 MB). Peak memory consumption was 112.4 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: 3.3s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 245 SDtfs, 32 SDslu, 1737 SDs, 0 SdLazy, 450 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, 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, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 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, 1.8s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 23450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 53/77 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...