/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:02:58,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:02:58,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:02:58,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:02:58,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:02:58,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:02:58,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:02:58,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:02:58,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:02:58,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:02:58,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:02:58,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:02:58,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:02:58,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:02:58,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:02:58,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:02:58,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:02:58,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:02:58,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:02:58,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:02:58,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:02:58,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:02:58,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:02:58,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:02:58,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:02:58,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:02:58,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:02:58,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:02:58,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:02:58,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:02:58,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:02:58,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:02:58,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:02:58,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:02:58,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:02:58,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:02:58,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:02:58,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:02:58,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:02:58,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:02:58,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:02:58,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:02:58,198 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:02:58,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:02:58,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:02:58,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:02:58,200 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:02:58,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:02:58,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:02:58,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:02:58,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:02:58,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:02:58,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:02:58,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:02:58,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:02:58,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:02:58,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:02:58,202 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:02:58,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:02:58,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:02:58,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:02:58,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:02:58,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:02:58,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:02:58,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:02:58,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:02:58,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:02:58,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:02:58,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:02:58,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:02:58,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:02:58,205 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:02:58,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:02:58,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:02:58,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:02:58,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:02:58,550 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:02:58,551 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 15:02:58,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c74dd291/34964d410a5f4237bc6980b5cf9e05bb/FLAGa445b0c55 [2020-08-21 15:02:59,100 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:02:59,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 15:02:59,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c74dd291/34964d410a5f4237bc6980b5cf9e05bb/FLAGa445b0c55 [2020-08-21 15:02:59,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c74dd291/34964d410a5f4237bc6980b5cf9e05bb [2020-08-21 15:02:59,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:02:59,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:02:59,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:59,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:02:59,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:02:59,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7331a2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59, skipping insertion in model container [2020-08-21 15:02:59,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:02:59,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:02:59,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:59,699 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:02:59,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:59,857 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:02:59,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59 WrapperNode [2020-08-21 15:02:59,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:59,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:02:59,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:02:59,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:02:59,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:02:59,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:02:59,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:02:59,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:02:59,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (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 [2020-08-21 15:02:59,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:02:59,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:02:59,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:02:59,979 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-21 15:02:59,980 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-21 15:02:59,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:02:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:02:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:02:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:02:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-21 15:02:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-21 15:02:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-21 15:02:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-21 15:02:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-21 15:02:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-21 15:02:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-21 15:02:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-21 15:02:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-21 15:02:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-21 15:02:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-21 15:02:59,985 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-21 15:02:59,987 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-21 15:02:59,987 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 15:02:59,988 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-21 15:02:59,988 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-21 15:02:59,989 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-21 15:02:59,989 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-21 15:02:59,989 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-21 15:02:59,989 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-21 15:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-21 15:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-21 15:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-21 15:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-21 15:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-21 15:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-21 15:02:59,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:02:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:02:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:02:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:02:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:02:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:02:59,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:03:00,486 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:03:00,487 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 15:03:00,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:03:00 BoogieIcfgContainer [2020-08-21 15:03:00,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:03:00,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:03:00,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:03:00,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:03:00,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:02:59" (1/3) ... [2020-08-21 15:03:00,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cff22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:03:00, skipping insertion in model container [2020-08-21 15:03:00,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (2/3) ... [2020-08-21 15:03:00,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cff22f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:03:00, skipping insertion in model container [2020-08-21 15:03:00,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:03:00" (3/3) ... [2020-08-21 15:03:00,500 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 15:03:00,511 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:03:00,519 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:03:00,534 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:03:00,561 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:03:00,561 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:03:00,561 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:03:00,561 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:03:00,562 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:03:00,562 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:03:00,562 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:03:00,562 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:03:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-21 15:03:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 15:03:00,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:00,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:00,592 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-08-21 15:03:00,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:00,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939857220] [2020-08-21 15:03:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:00,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:00,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 15:03:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:00,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939857220] [2020-08-21 15:03:00,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:00,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:03:00,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991659882] [2020-08-21 15:03:00,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:03:00,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:03:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:03:00,873 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-08-21 15:03:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:01,092 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-08-21 15:03:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:03:01,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-21 15:03:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:01,103 INFO L225 Difference]: With dead ends: 104 [2020-08-21 15:03:01,103 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 15:03:01,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:03:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 15:03:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-21 15:03:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 15:03:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-08-21 15:03:01,155 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 32 [2020-08-21 15:03:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:01,156 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-08-21 15:03:01,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:03:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-08-21 15:03:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 15:03:01,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:01,158 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:01,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:03:01,159 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash 227833136, now seen corresponding path program 1 times [2020-08-21 15:03:01,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:01,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699033007] [2020-08-21 15:03:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:03:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:01,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699033007] [2020-08-21 15:03:01,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:01,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:03:01,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213233233] [2020-08-21 15:03:01,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:03:01,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:03:01,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:03:01,252 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2020-08-21 15:03:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:01,420 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-08-21 15:03:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:03:01,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-21 15:03:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:01,423 INFO L225 Difference]: With dead ends: 90 [2020-08-21 15:03:01,423 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 15:03:01,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:03:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 15:03:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-08-21 15:03:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 15:03:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-08-21 15:03:01,434 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 38 [2020-08-21 15:03:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:01,434 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-08-21 15:03:01,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:03:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-08-21 15:03:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 15:03:01,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:01,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:01,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:03:01,437 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:01,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1109616718, now seen corresponding path program 2 times [2020-08-21 15:03:01,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:01,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305387545] [2020-08-21 15:03:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 15:03:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:01,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305387545] [2020-08-21 15:03:01,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:01,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:03:01,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431806963] [2020-08-21 15:03:01,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:03:01,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:03:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:03:01,561 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2020-08-21 15:03:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:01,700 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-08-21 15:03:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:03:01,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-21 15:03:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:01,702 INFO L225 Difference]: With dead ends: 92 [2020-08-21 15:03:01,702 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 15:03:01,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:03:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 15:03:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-08-21 15:03:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 15:03:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-08-21 15:03:01,712 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 40 [2020-08-21 15:03:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:01,712 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-08-21 15:03:01,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:03:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-08-21 15:03:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 15:03:01,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:01,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:01,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:03:01,715 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2091262388, now seen corresponding path program 3 times [2020-08-21 15:03:01,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:01,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379510178] [2020-08-21 15:03:01,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 15:03:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:01,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379510178] [2020-08-21 15:03:01,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:01,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:03:01,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262597997] [2020-08-21 15:03:01,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:03:01,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:01,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:03:01,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:03:01,809 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-08-21 15:03:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:01,944 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-08-21 15:03:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:03:01,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-21 15:03:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:01,946 INFO L225 Difference]: With dead ends: 94 [2020-08-21 15:03:01,946 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 15:03:01,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:03:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 15:03:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-08-21 15:03:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 15:03:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-08-21 15:03:01,956 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 42 [2020-08-21 15:03:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:01,956 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-08-21 15:03:01,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:03:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-08-21 15:03:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 15:03:01,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:01,958 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:01,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:03:01,959 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:01,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1355467978, now seen corresponding path program 4 times [2020-08-21 15:03:01,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:01,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928144598] [2020-08-21 15:03:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 15:03:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:02,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928144598] [2020-08-21 15:03:02,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:02,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 15:03:02,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007600675] [2020-08-21 15:03:02,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:03:02,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:02,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:03:02,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:03:02,059 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 8 states. [2020-08-21 15:03:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:02,176 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-08-21 15:03:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:03:02,177 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-08-21 15:03:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:02,178 INFO L225 Difference]: With dead ends: 96 [2020-08-21 15:03:02,178 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 15:03:02,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:03:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 15:03:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-08-21 15:03:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 15:03:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-08-21 15:03:02,187 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 44 [2020-08-21 15:03:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:02,187 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-08-21 15:03:02,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:03:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-08-21 15:03:02,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 15:03:02,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:02,189 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:02,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:03:02,190 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2051402808, now seen corresponding path program 5 times [2020-08-21 15:03:02,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:02,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505074688] [2020-08-21 15:03:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 15:03:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:02,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505074688] [2020-08-21 15:03:02,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:02,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:03:02,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82222132] [2020-08-21 15:03:02,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:03:02,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:03:02,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:03:02,303 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 9 states. [2020-08-21 15:03:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:02,453 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-21 15:03:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:03:02,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-08-21 15:03:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:02,455 INFO L225 Difference]: With dead ends: 98 [2020-08-21 15:03:02,455 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 15:03:02,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:03:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 15:03:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-08-21 15:03:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 15:03:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-08-21 15:03:02,462 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 46 [2020-08-21 15:03:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:02,463 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-08-21 15:03:02,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:03:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-08-21 15:03:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 15:03:02,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:02,464 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:02,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:03:02,465 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1005818694, now seen corresponding path program 6 times [2020-08-21 15:03:02,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:02,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112560486] [2020-08-21 15:03:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 15:03:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:02,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112560486] [2020-08-21 15:03:02,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:02,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:03:02,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004501875] [2020-08-21 15:03:02,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:03:02,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:02,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:03:02,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:03:02,578 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-08-21 15:03:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:02,724 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-08-21 15:03:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:03:02,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-08-21 15:03:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:02,726 INFO L225 Difference]: With dead ends: 100 [2020-08-21 15:03:02,726 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 15:03:02,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:03:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 15:03:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-08-21 15:03:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 15:03:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-08-21 15:03:02,733 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 48 [2020-08-21 15:03:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:02,733 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-08-21 15:03:02,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:03:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-08-21 15:03:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 15:03:02,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:02,735 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:02,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:03:02,735 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:02,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1238051652, now seen corresponding path program 7 times [2020-08-21 15:03:02,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:02,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981347958] [2020-08-21 15:03:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 15:03:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:02,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981347958] [2020-08-21 15:03:02,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:02,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 15:03:02,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602913492] [2020-08-21 15:03:02,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:03:02,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:02,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:03:02,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:03:02,845 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 11 states. [2020-08-21 15:03:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:03,004 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-08-21 15:03:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:03:03,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-08-21 15:03:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:03,006 INFO L225 Difference]: With dead ends: 101 [2020-08-21 15:03:03,006 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 15:03:03,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:03:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 15:03:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-08-21 15:03:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 15:03:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-08-21 15:03:03,013 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 50 [2020-08-21 15:03:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:03,013 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-08-21 15:03:03,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:03:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-08-21 15:03:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:03:03,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:03,015 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:03,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:03:03,016 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1075624898, now seen corresponding path program 8 times [2020-08-21 15:03:03,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:03,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50960867] [2020-08-21 15:03:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 15:03:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 15:03:03,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50960867] [2020-08-21 15:03:03,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:03,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:03:03,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702789857] [2020-08-21 15:03:03,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:03:03,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:03,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:03:03,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:03:03,080 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-08-21 15:03:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:03,166 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-21 15:03:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:03:03,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-08-21 15:03:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:03,167 INFO L225 Difference]: With dead ends: 98 [2020-08-21 15:03:03,168 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 15:03:03,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:03:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 15:03:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 15:03:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 15:03:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-08-21 15:03:03,174 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 52 [2020-08-21 15:03:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:03,174 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-08-21 15:03:03,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:03:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-08-21 15:03:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:03:03,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:03,176 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:03,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:03:03,176 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -856770180, now seen corresponding path program 1 times [2020-08-21 15:03:03,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:03,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169608272] [2020-08-21 15:03:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 15:03:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 15:03:03,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169608272] [2020-08-21 15:03:03,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:03,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:03:03,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046329209] [2020-08-21 15:03:03,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:03:03,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:03,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:03:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:03:03,274 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 7 states. [2020-08-21 15:03:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:03,529 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-08-21 15:03:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:03:03,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-21 15:03:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:03,534 INFO L225 Difference]: With dead ends: 147 [2020-08-21 15:03:03,534 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 15:03:03,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:03:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 15:03:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-08-21 15:03:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 15:03:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-08-21 15:03:03,546 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 52 [2020-08-21 15:03:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:03,546 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-08-21 15:03:03,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:03:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-08-21 15:03:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:03:03,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:03,548 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:03,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:03:03,548 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1749253374, now seen corresponding path program 1 times [2020-08-21 15:03:03,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:03,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314429031] [2020-08-21 15:03:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 15:03:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 15:03:03,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314429031] [2020-08-21 15:03:03,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:03,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:03:03,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128937594] [2020-08-21 15:03:03,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:03:03,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:03,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:03:03,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:03:03,626 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 6 states. [2020-08-21 15:03:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:03,801 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2020-08-21 15:03:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:03:03,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-08-21 15:03:03,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:03,804 INFO L225 Difference]: With dead ends: 132 [2020-08-21 15:03:03,804 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 15:03:03,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:03:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 15:03:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-08-21 15:03:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 15:03:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-08-21 15:03:03,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 52 [2020-08-21 15:03:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:03,812 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-08-21 15:03:03,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:03:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-08-21 15:03:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:03:03,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:03,814 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:03,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:03:03,814 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:03,816 INFO L82 PathProgramCache]: Analyzing trace with hash 694889275, now seen corresponding path program 1 times [2020-08-21 15:03:03,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:03,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624898394] [2020-08-21 15:03:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:03:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-21 15:03:03,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624898394] [2020-08-21 15:03:03,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:03,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:03:03,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989862383] [2020-08-21 15:03:03,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:03:03,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:03:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:03:03,930 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 7 states. [2020-08-21 15:03:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:04,239 INFO L93 Difference]: Finished difference Result 159 states and 204 transitions. [2020-08-21 15:03:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:03:04,239 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-08-21 15:03:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:04,241 INFO L225 Difference]: With dead ends: 159 [2020-08-21 15:03:04,241 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 15:03:04,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:03:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 15:03:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-08-21 15:03:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 15:03:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-08-21 15:03:04,257 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 57 [2020-08-21 15:03:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:04,258 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-08-21 15:03:04,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:03:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-08-21 15:03:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:03:04,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:04,259 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:04,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:03:04,259 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash -994054467, now seen corresponding path program 1 times [2020-08-21 15:03:04,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:04,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195542092] [2020-08-21 15:03:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:04,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:04,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:03:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-21 15:03:04,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195542092] [2020-08-21 15:03:04,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:04,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:03:04,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960093343] [2020-08-21 15:03:04,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:03:04,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:04,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:03:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:03:04,347 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 6 states. [2020-08-21 15:03:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:04,497 INFO L93 Difference]: Finished difference Result 151 states and 191 transitions. [2020-08-21 15:03:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:03:04,498 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-21 15:03:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:04,499 INFO L225 Difference]: With dead ends: 151 [2020-08-21 15:03:04,499 INFO L226 Difference]: Without dead ends: 115 [2020-08-21 15:03:04,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:03:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-21 15:03:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2020-08-21 15:03:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 15:03:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-08-21 15:03:04,511 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2020-08-21 15:03:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:04,512 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-08-21 15:03:04,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:03:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-08-21 15:03:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:03:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:04,513 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:04,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:03:04,513 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1580860481, now seen corresponding path program 1 times [2020-08-21 15:03:04,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:04,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465982866] [2020-08-21 15:03:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:04,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:04,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:03:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-21 15:03:04,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465982866] [2020-08-21 15:03:04,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:04,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:03:04,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546444480] [2020-08-21 15:03:04,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:03:04,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:03:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:03:04,598 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 6 states. [2020-08-21 15:03:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:04,727 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-08-21 15:03:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:03:04,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-21 15:03:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:04,728 INFO L225 Difference]: With dead ends: 96 [2020-08-21 15:03:04,728 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:03:04,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:03:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:03:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:03:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:03:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:03:04,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-08-21 15:03:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:04,732 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:03:04,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:03:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:03:04,732 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:03:04,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:03:04,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:03:04,813 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-08-21 15:03:04,813 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-08-21 15:03:04,814 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-08-21 15:03:04,814 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-08-21 15:03:04,814 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-08-21 15:03:04,814 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-08-21 15:03:04,814 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-08-21 15:03:04,814 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-08-21 15:03:04,814 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-08-21 15:03:04,815 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-08-21 15:03:04,815 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-08-21 15:03:04,815 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-21 15:03:04,815 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-08-21 15:03:04,815 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-08-21 15:03:04,815 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-08-21 15:03:04,816 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-08-21 15:03:04,816 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-21 15:03:04,816 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-08-21 15:03:04,816 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-08-21 15:03:04,816 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-08-21 15:03:04,816 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-21 15:03:04,816 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-08-21 15:03:04,817 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-08-21 15:03:04,817 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-08-21 15:03:04,817 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-08-21 15:03:04,817 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-08-21 15:03:04,817 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-08-21 15:03:04,817 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-08-21 15:03:04,818 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-08-21 15:03:04,818 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-08-21 15:03:04,818 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-08-21 15:03:04,818 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:03:04,818 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 15:03:04,818 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:03:04,818 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-08-21 15:03:04,819 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-08-21 15:03:04,819 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-08-21 15:03:04,819 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:03:04,819 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 15:03:04,819 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 15:03:04,819 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:03:04,819 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-21 15:03:04,820 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-08-21 15:03:04,820 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-08-21 15:03:04,820 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-08-21 15:03:04,820 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-08-21 15:03:04,820 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-08-21 15:03:04,820 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-08-21 15:03:04,821 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-08-21 15:03:04,821 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 15:03:04,821 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 15:03:04,821 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 15:03:04,821 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 15:03:04,821 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 15:03:04,822 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 15:03:04,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:03:04 BoogieIcfgContainer [2020-08-21 15:03:04,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:03:04,836 INFO L168 Benchmark]: Toolchain (without parser) took 5386.51 ms. Allocated memory was 139.5 MB in the beginning and 284.2 MB in the end (delta: 144.7 MB). Free memory was 102.3 MB in the beginning and 136.5 MB in the end (delta: -34.2 MB). Peak memory consumption was 110.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:04,836 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 420.0 kB). Peak memory consumption was 420.0 kB. Max. memory is 7.1 GB. [2020-08-21 15:03:04,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.51 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 102.3 MB in the beginning and 178.3 MB in the end (delta: -76.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:04,838 INFO L168 Benchmark]: Boogie Preprocessor took 50.83 ms. Allocated memory is still 201.9 MB. Free memory was 178.3 MB in the beginning and 175.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:04,838 INFO L168 Benchmark]: RCFGBuilder took 581.15 ms. Allocated memory is still 201.9 MB. Free memory was 175.2 MB in the beginning and 146.6 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:04,839 INFO L168 Benchmark]: TraceAbstraction took 4340.52 ms. Allocated memory was 201.9 MB in the beginning and 284.2 MB in the end (delta: 82.3 MB). Free memory was 146.6 MB in the beginning and 136.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 92.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:04,842 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 420.0 kB). Peak memory consumption was 420.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 409.51 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 102.3 MB in the beginning and 178.3 MB in the end (delta: -76.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.83 ms. Allocated memory is still 201.9 MB. Free memory was 178.3 MB in the beginning and 175.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 581.15 ms. Allocated memory is still 201.9 MB. Free memory was 175.2 MB in the beginning and 146.6 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4340.52 ms. Allocated memory was 201.9 MB in the beginning and 284.2 MB in the end (delta: 82.3 MB). Free memory was 146.6 MB in the beginning and 136.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 92.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 14, TraceHistogramMax: 8, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 732 SDtfs, 388 SDslu, 1954 SDs, 0 SdLazy, 1655 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=13, 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, 14 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 88 PreInvPairs, 113 NumberOfFragments, 35 HoareAnnotationTreeSize, 88 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 667 NumberOfCodeBlocks, 667 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 653 ConstructedInterpolants, 0 QuantifiedInterpolants, 57554 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 390/530 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...