/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:51:41,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:51:41,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:51:41,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:51:41,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:51:41,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:51:41,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:51:41,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:51:41,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:51:41,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:51:41,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:51:41,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:51:41,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:51:41,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:51:41,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:51:41,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:51:41,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:51:41,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:51:41,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:51:41,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:51:41,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:51:41,985 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:51:41,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:51:41,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:51:41,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:51:41,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:51:41,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:51:41,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:51:41,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:51:41,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:51:41,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:51:41,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:51:41,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:51:41,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:51:41,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:51:41,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:51:41,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:51:41,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:51:41,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:51:41,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:51:41,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:51:41,999 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 [2020-08-18 22:51:42,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:51:42,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:51:42,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:51:42,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:51:42,042 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:51:42,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:51:42,043 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:51:42,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:51:42,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:51:42,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:51:42,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:51:42,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:51:42,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:51:42,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:51:42,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:51:42,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:51:42,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:51:42,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:51:42,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:51:42,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:51:42,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:51:42,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:51:42,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:51:42,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:51:42,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:51:42,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:51:42,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:51:42,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:51:42,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:51:42,050 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=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:51:42,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:51:42,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:51:42,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:51:42,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:51:42,355 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:51:42,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-18 22:51:42,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bb972738/7f96816dad0242858743671ae47c9d62/FLAG10002a6aa [2020-08-18 22:51:42,962 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:51:42,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-08-18 22:51:42,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bb972738/7f96816dad0242858743671ae47c9d62/FLAG10002a6aa [2020-08-18 22:51:43,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4bb972738/7f96816dad0242858743671ae47c9d62 [2020-08-18 22:51:43,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:51:43,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:51:43,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:51:43,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:51:43,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:51:43,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65cae058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43, skipping insertion in model container [2020-08-18 22:51:43,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:51:43,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:51:43,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:51:43,703 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:51:43,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:51:43,828 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:51:43,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43 WrapperNode [2020-08-18 22:51:43,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:51:43,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:51:43,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:51:43,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:51:43,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (1/1) ... [2020-08-18 22:51:43,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:51:43,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:51:43,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:51:43,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:51:43,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (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 [2020-08-18 22:51:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:51:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:51:44,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:51:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:51:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-18 22:51:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-18 22:51:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:51:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:51:44,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:51:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:51:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 22:51:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 22:51:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:51:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:51:44,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:51:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:51:44,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 22:51:46,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:51:46,847 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:51:46,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:51:46 BoogieIcfgContainer [2020-08-18 22:51:46,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:51:46,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:51:46,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:51:46,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:51:46,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:51:43" (1/3) ... [2020-08-18 22:51:46,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b79f368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:51:46, skipping insertion in model container [2020-08-18 22:51:46,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:51:43" (2/3) ... [2020-08-18 22:51:46,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b79f368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:51:46, skipping insertion in model container [2020-08-18 22:51:46,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:51:46" (3/3) ... [2020-08-18 22:51:46,862 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-08-18 22:51:46,875 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:51:46,883 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:51:46,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:51:46,923 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:51:46,924 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:51:46,924 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:51:46,924 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:51:46,924 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:51:46,925 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:51:46,925 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:51:46,925 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:51:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 22:51:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 22:51:46,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:51:46,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:51:46,955 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:51:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:51:46,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-08-18 22:51:46,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:51:46,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964814178] [2020-08-18 22:51:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:51:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:51:47,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:51:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:51:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:51:47,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964814178] [2020-08-18 22:51:47,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:51:47,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:51:47,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231638005] [2020-08-18 22:51:47,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:51:47,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:51:47,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:51:47,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:51:47,494 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-18 22:51:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:51:49,712 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-08-18 22:51:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:51:49,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-18 22:51:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:51:49,734 INFO L225 Difference]: With dead ends: 38 [2020-08-18 22:51:49,734 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 22:51:49,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:51:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 22:51:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-08-18 22:51:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 22:51:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-18 22:51:49,791 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-08-18 22:51:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:51:49,792 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-18 22:51:49,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:51:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-18 22:51:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 22:51:49,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:51:49,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:51:49,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:51:49,794 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:51:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:51:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-08-18 22:51:49,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:51:49,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682838176] [2020-08-18 22:51:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:51:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:51:50,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:51:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:51:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:51:50,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682838176] [2020-08-18 22:51:50,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:51:50,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:51:50,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708709091] [2020-08-18 22:51:50,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:51:50,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:51:50,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:51:50,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:51:50,085 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-08-18 22:51:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:51:54,274 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-08-18 22:51:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:51:54,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-18 22:51:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:51:54,278 INFO L225 Difference]: With dead ends: 29 [2020-08-18 22:51:54,279 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 22:51:54,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:51:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 22:51:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-08-18 22:51:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 22:51:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-08-18 22:51:54,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-08-18 22:51:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:51:54,293 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-08-18 22:51:54,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:51:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-08-18 22:51:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 22:51:54,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:51:54,295 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:51:54,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:51:54,296 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:51:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:51:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash 491744683, now seen corresponding path program 2 times [2020-08-18 22:51:54,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:51:54,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887106016] [2020-08-18 22:51:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:51:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:51:54,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:51:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:51:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:51:54,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887106016] [2020-08-18 22:51:54,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:51:54,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:51:54,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995304135] [2020-08-18 22:51:54,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:51:54,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:51:54,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:51:54,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:51:54,594 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-08-18 22:52:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:00,870 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-08-18 22:52:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:52:00,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-18 22:52:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:00,872 INFO L225 Difference]: With dead ends: 34 [2020-08-18 22:52:00,872 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 22:52:00,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:52:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 22:52:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-18 22:52:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 22:52:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-18 22:52:00,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-08-18 22:52:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:00,879 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-18 22:52:00,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:52:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-18 22:52:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:52:00,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:00,881 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:52:00,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:52:00,881 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash 161258737, now seen corresponding path program 3 times [2020-08-18 22:52:00,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:00,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902725811] [2020-08-18 22:52:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:01,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:01,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902725811] [2020-08-18 22:52:01,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:01,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:52:01,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516104648] [2020-08-18 22:52:01,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:52:01,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:01,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:52:01,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:52:01,056 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2020-08-18 22:52:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:09,395 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-08-18 22:52:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:52:09,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-18 22:52:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:09,398 INFO L225 Difference]: With dead ends: 39 [2020-08-18 22:52:09,398 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 22:52:09,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:52:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 22:52:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-08-18 22:52:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 22:52:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-08-18 22:52:09,405 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-08-18 22:52:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:09,406 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-08-18 22:52:09,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:52:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-08-18 22:52:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 22:52:09,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:09,407 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:52:09,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:52:09,408 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:09,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 4 times [2020-08-18 22:52:09,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:09,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851204028] [2020-08-18 22:52:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:09,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:09,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851204028] [2020-08-18 22:52:09,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:09,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:52:09,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916623923] [2020-08-18 22:52:09,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:52:09,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:52:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:52:09,598 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2020-08-18 22:52:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:19,957 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-08-18 22:52:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:52:19,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-08-18 22:52:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:19,960 INFO L225 Difference]: With dead ends: 44 [2020-08-18 22:52:19,960 INFO L226 Difference]: Without dead ends: 41 [2020-08-18 22:52:19,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:52:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-18 22:52:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-08-18 22:52:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 22:52:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-08-18 22:52:19,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-08-18 22:52:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:19,970 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-08-18 22:52:19,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:52:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-08-18 22:52:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 22:52:19,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:19,972 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:52:19,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:52:19,972 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash -737191631, now seen corresponding path program 5 times [2020-08-18 22:52:19,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:19,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029841414] [2020-08-18 22:52:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:20,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:20,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029841414] [2020-08-18 22:52:20,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:20,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:52:20,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082412582] [2020-08-18 22:52:20,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:52:20,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:52:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:52:20,198 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-08-18 22:52:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:32,613 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-08-18 22:52:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:52:32,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-18 22:52:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:32,615 INFO L225 Difference]: With dead ends: 49 [2020-08-18 22:52:32,615 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 22:52:32,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:52:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 22:52:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-08-18 22:52:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 22:52:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-08-18 22:52:32,628 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-08-18 22:52:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:32,631 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-08-18 22:52:32,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:52:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-08-18 22:52:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-18 22:52:32,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:32,634 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:52:32,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:52:32,635 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1715407573, now seen corresponding path program 6 times [2020-08-18 22:52:32,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:32,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995844799] [2020-08-18 22:52:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:32,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995844799] [2020-08-18 22:52:32,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:32,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:52:32,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29315076] [2020-08-18 22:52:32,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:52:32,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:52:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:52:32,924 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 11 states. [2020-08-18 22:52:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:52:47,423 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-08-18 22:52:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:52:47,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-08-18 22:52:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:52:47,425 INFO L225 Difference]: With dead ends: 54 [2020-08-18 22:52:47,425 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 22:52:47,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:52:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 22:52:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-08-18 22:52:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 22:52:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-08-18 22:52:47,440 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-08-18 22:52:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:52:47,444 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-08-18 22:52:47,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:52:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-08-18 22:52:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 22:52:47,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:52:47,446 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:52:47,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:52:47,446 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:52:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:52:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash -462174863, now seen corresponding path program 7 times [2020-08-18 22:52:47,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:52:47,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252170089] [2020-08-18 22:52:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:52:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:52:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:52:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:52:47,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252170089] [2020-08-18 22:52:47,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:52:47,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 22:52:47,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489057656] [2020-08-18 22:52:47,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 22:52:47,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:52:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 22:52:47,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:52:47,708 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 12 states.