/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:01:50,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:01:50,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:01:50,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:01:50,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:01:50,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:01:50,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:01:50,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:01:50,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:01:50,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:01:50,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:01:50,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:01:50,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:01:50,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:01:50,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:01:50,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:01:50,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:01:50,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:01:50,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:01:50,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:01:50,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:01:50,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:01:50,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:01:50,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:01:50,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 23:01:50,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 23:01:50,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 23:01:50,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 23:01:50,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 23:01:50,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 23:01:50,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 23:01:50,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 23:01:50,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 23:01:50,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 23:01:50,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 23:01:50,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 23:01:50,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 23:01:50,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 23:01:50,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:01:50,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:01:50,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:01:50,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:01:50,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:01:50,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:01:50,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:01:50,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:01:50,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:01:50,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:01:50,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:01:50,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:01:50,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:01:50,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:01:50,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:01:50,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:01:50,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:01:50,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:01:50,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:01:50,249 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:01:50,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:01:50,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:01:50,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:50,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:01:50,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:01:50,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:01:50,253 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 23:01:50,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:01:50,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:01:50,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:01:50,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:01:50,562 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:01:50,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 23:01:50,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec363020/4a2ab8094b26494eb264befd4f4b639f/FLAGe3b864a62 [2020-08-22 23:01:51,086 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:01:51,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 23:01:51,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec363020/4a2ab8094b26494eb264befd4f4b639f/FLAGe3b864a62 [2020-08-22 23:01:51,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ec363020/4a2ab8094b26494eb264befd4f4b639f [2020-08-22 23:01:51,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:01:51,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:01:51,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:51,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:01:51,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:01:51,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168e2897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51, skipping insertion in model container [2020-08-22 23:01:51,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:01:51,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:01:51,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:51,700 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:01:51,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:51,859 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:01:51,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51 WrapperNode [2020-08-22 23:01:51,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:51,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:01:51,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:01:51,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:01:51,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... [2020-08-22 23:01:51,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:01:51,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:01:51,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:01:51,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:01:51,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:01:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:01:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:01:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-22 23:01:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-22 23:01:51,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:01:51,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:01:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 23:01:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:01:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-22 23:01:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-22 23:01:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-22 23:01:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-22 23:01:51,978 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-22 23:01:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-22 23:01:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-22 23:01:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-22 23:01:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-22 23:01:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-22 23:01:51,979 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-22 23:01:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-22 23:01:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-22 23:01:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-22 23:01:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-22 23:01:51,980 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-22 23:01:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-22 23:01:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-22 23:01:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-22 23:01:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-22 23:01:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-22 23:01:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-22 23:01:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-22 23:01:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-22 23:01:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-22 23:01:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-22 23:01:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:01:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:01:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:01:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:01:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:01:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:01:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:01:52,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:01:52,563 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 23:01:52,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:52 BoogieIcfgContainer [2020-08-22 23:01:52,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:01:52,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:01:52,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:01:52,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:01:52,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:01:51" (1/3) ... [2020-08-22 23:01:52,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384d8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:52, skipping insertion in model container [2020-08-22 23:01:52,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:51" (2/3) ... [2020-08-22 23:01:52,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384d8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:52, skipping insertion in model container [2020-08-22 23:01:52,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:52" (3/3) ... [2020-08-22 23:01:52,588 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 23:01:52,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:01:52,605 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:01:52,616 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:01:52,634 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:01:52,634 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:01:52,634 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:01:52,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:01:52,635 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:01:52,635 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:01:52,635 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:01:52,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:01:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-08-22 23:01:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 23:01:52,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:52,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:52,671 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash 593727157, now seen corresponding path program 1 times [2020-08-22 23:01:52,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:52,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136790049] [2020-08-22 23:01:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:52,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:52,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 23:01:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:52,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136790049] [2020-08-22 23:01:52,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:52,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:01:52,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551194635] [2020-08-22 23:01:52,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:01:52,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:01:52,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:01:52,929 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-08-22 23:01:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:53,252 INFO L93 Difference]: Finished difference Result 254 states and 290 transitions. [2020-08-22 23:01:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:01:53,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-22 23:01:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:53,265 INFO L225 Difference]: With dead ends: 254 [2020-08-22 23:01:53,266 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 23:01:53,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:01:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 23:01:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-08-22 23:01:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 23:01:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-08-22 23:01:53,342 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 51 [2020-08-22 23:01:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:53,343 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-08-22 23:01:53,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:01:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-08-22 23:01:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 23:01:53,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:53,351 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, 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] [2020-08-22 23:01:53,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:01:53,351 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1128985001, now seen corresponding path program 1 times [2020-08-22 23:01:53,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:53,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348899956] [2020-08-22 23:01:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:53,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:53,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 23:01:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:53,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348899956] [2020-08-22 23:01:53,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:53,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:01:53,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699739342] [2020-08-22 23:01:53,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:01:53,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:01:53,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:01:53,527 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 4 states. [2020-08-22 23:01:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:53,831 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2020-08-22 23:01:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 23:01:53,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-08-22 23:01:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:53,834 INFO L225 Difference]: With dead ends: 212 [2020-08-22 23:01:53,835 INFO L226 Difference]: Without dead ends: 117 [2020-08-22 23:01:53,838 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 [2020-08-22 23:01:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-22 23:01:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-08-22 23:01:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 23:01:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-08-22 23:01:53,875 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 63 [2020-08-22 23:01:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:53,875 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-08-22 23:01:53,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:01:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-08-22 23:01:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 23:01:53,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:53,879 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, 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] [2020-08-22 23:01:53,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:01:53,879 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1210839627, now seen corresponding path program 1 times [2020-08-22 23:01:53,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:53,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021918508] [2020-08-22 23:01:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 23:01:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:54,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021918508] [2020-08-22 23:01:54,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:54,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:01:54,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594610673] [2020-08-22 23:01:54,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:01:54,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:54,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:01:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:01:54,037 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 6 states. [2020-08-22 23:01:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:54,306 INFO L93 Difference]: Finished difference Result 219 states and 239 transitions. [2020-08-22 23:01:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:01:54,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-08-22 23:01:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:54,308 INFO L225 Difference]: With dead ends: 219 [2020-08-22 23:01:54,308 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 23:01:54,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:01:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 23:01:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-08-22 23:01:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 23:01:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-08-22 23:01:54,325 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 70 [2020-08-22 23:01:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:54,326 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-08-22 23:01:54,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:01:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-08-22 23:01:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 23:01:54,333 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:54,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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] [2020-08-22 23:01:54,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:01:54,334 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash -257337495, now seen corresponding path program 2 times [2020-08-22 23:01:54,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:54,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136361421] [2020-08-22 23:01:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 23:01:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:54,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136361421] [2020-08-22 23:01:54,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:54,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:01:54,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084130100] [2020-08-22 23:01:54,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:01:54,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:01:54,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:01:54,448 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 8 states. [2020-08-22 23:01:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:54,784 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2020-08-22 23:01:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:01:54,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-08-22 23:01:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:54,786 INFO L225 Difference]: With dead ends: 226 [2020-08-22 23:01:54,786 INFO L226 Difference]: Without dead ends: 131 [2020-08-22 23:01:54,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:01:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-08-22 23:01:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-08-22 23:01:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 23:01:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-08-22 23:01:54,806 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 77 [2020-08-22 23:01:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:54,807 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-08-22 23:01:54,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:01:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-08-22 23:01:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 23:01:54,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:54,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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] [2020-08-22 23:01:54,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:01:54,810 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:54,815 INFO L82 PathProgramCache]: Analyzing trace with hash 883135627, now seen corresponding path program 3 times [2020-08-22 23:01:54,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:54,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731459610] [2020-08-22 23:01:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 23:01:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:54,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731459610] [2020-08-22 23:01:54,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:54,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:01:54,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950029558] [2020-08-22 23:01:54,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:01:54,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:54,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:01:54,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:01:54,992 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand 10 states. [2020-08-22 23:01:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:55,247 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-08-22 23:01:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:01:55,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-08-22 23:01:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:55,250 INFO L225 Difference]: With dead ends: 233 [2020-08-22 23:01:55,250 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 23:01:55,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:01:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 23:01:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-08-22 23:01:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-22 23:01:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-08-22 23:01:55,263 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 84 [2020-08-22 23:01:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:55,264 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-08-22 23:01:55,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:01:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-08-22 23:01:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 23:01:55,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:55,266 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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] [2020-08-22 23:01:55,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:01:55,266 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:55,267 INFO L82 PathProgramCache]: Analyzing trace with hash -687690455, now seen corresponding path program 4 times [2020-08-22 23:01:55,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:55,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340754335] [2020-08-22 23:01:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:55,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:55,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 23:01:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:55,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340754335] [2020-08-22 23:01:55,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:55,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:01:55,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166573400] [2020-08-22 23:01:55,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:01:55,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:55,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:01:55,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:01:55,413 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 12 states. [2020-08-22 23:01:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:55,751 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2020-08-22 23:01:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 23:01:55,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-08-22 23:01:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:55,754 INFO L225 Difference]: With dead ends: 240 [2020-08-22 23:01:55,754 INFO L226 Difference]: Without dead ends: 145 [2020-08-22 23:01:55,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:01:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-22 23:01:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-08-22 23:01:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 23:01:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-08-22 23:01:55,768 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 91 [2020-08-22 23:01:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:55,769 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-08-22 23:01:55,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:01:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-08-22 23:01:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 23:01:55,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:55,770 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2020-08-22 23:01:55,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:01:55,771 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash -722319669, now seen corresponding path program 5 times [2020-08-22 23:01:55,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:55,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203360759] [2020-08-22 23:01:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:55,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:55,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 23:01:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:55,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203360759] [2020-08-22 23:01:55,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:55,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:01:55,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919854967] [2020-08-22 23:01:55,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:01:55,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:55,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:01:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:01:55,926 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 14 states. [2020-08-22 23:01:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:56,332 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2020-08-22 23:01:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 23:01:56,333 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-08-22 23:01:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:56,335 INFO L225 Difference]: With dead ends: 247 [2020-08-22 23:01:56,335 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 23:01:56,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:01:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 23:01:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-08-22 23:01:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-22 23:01:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-08-22 23:01:56,366 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 98 [2020-08-22 23:01:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:56,367 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-08-22 23:01:56,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:01:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-08-22 23:01:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 23:01:56,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:56,369 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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] [2020-08-22 23:01:56,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:01:56,369 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1819472617, now seen corresponding path program 6 times [2020-08-22 23:01:56,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:56,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253062803] [2020-08-22 23:01:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:56,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:56,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 23:01:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:56,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253062803] [2020-08-22 23:01:56,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:56,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 23:01:56,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012346317] [2020-08-22 23:01:56,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 23:01:56,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 23:01:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:01:56,606 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-08-22 23:01:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:57,109 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2020-08-22 23:01:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 23:01:57,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-08-22 23:01:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:57,111 INFO L225 Difference]: With dead ends: 254 [2020-08-22 23:01:57,111 INFO L226 Difference]: Without dead ends: 159 [2020-08-22 23:01:57,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:01:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-08-22 23:01:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-08-22 23:01:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 23:01:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-08-22 23:01:57,124 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 105 [2020-08-22 23:01:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:57,124 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-08-22 23:01:57,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 23:01:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-08-22 23:01:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 23:01:57,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:57,127 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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, 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] [2020-08-22 23:01:57,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:01:57,127 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash -612628213, now seen corresponding path program 7 times [2020-08-22 23:01:57,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:57,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177946047] [2020-08-22 23:01:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:57,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:57,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 23:01:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:57,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177946047] [2020-08-22 23:01:57,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:57,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:01:57,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416009955] [2020-08-22 23:01:57,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:01:57,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:01:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:01:57,370 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 18 states. [2020-08-22 23:01:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:57,814 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2020-08-22 23:01:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 23:01:57,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-08-22 23:01:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:57,818 INFO L225 Difference]: With dead ends: 256 [2020-08-22 23:01:57,818 INFO L226 Difference]: Without dead ends: 161 [2020-08-22 23:01:57,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:01:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-08-22 23:01:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-08-22 23:01:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 23:01:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2020-08-22 23:01:57,829 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 112 [2020-08-22 23:01:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:57,829 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2020-08-22 23:01:57,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:01:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2020-08-22 23:01:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 23:01:57,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:57,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:01:57,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:01:57,832 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1175857321, now seen corresponding path program 8 times [2020-08-22 23:01:57,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:57,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56877668] [2020-08-22 23:01:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:57,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 23:01:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:01:57,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56877668] [2020-08-22 23:01:57,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:57,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:01:57,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515109809] [2020-08-22 23:01:57,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:01:57,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:01:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:01:57,902 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand 4 states. [2020-08-22 23:01:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:58,054 INFO L93 Difference]: Finished difference Result 249 states and 269 transitions. [2020-08-22 23:01:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 23:01:58,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-08-22 23:01:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:58,056 INFO L225 Difference]: With dead ends: 249 [2020-08-22 23:01:58,056 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 23:01:58,057 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 [2020-08-22 23:01:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 23:01:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-22 23:01:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 23:01:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2020-08-22 23:01:58,069 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 119 [2020-08-22 23:01:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:58,087 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2020-08-22 23:01:58,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:01:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2020-08-22 23:01:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 23:01:58,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:58,088 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:01:58,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:01:58,088 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1395739916, now seen corresponding path program 1 times [2020-08-22 23:01:58,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:58,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90268526] [2020-08-22 23:01:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:58,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 23:01:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:01:58,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90268526] [2020-08-22 23:01:58,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:58,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 23:01:58,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283113411] [2020-08-22 23:01:58,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:01:58,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:58,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:01:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:01:58,217 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand 8 states. [2020-08-22 23:01:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:58,649 INFO L93 Difference]: Finished difference Result 427 states and 473 transitions. [2020-08-22 23:01:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:01:58,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-22 23:01:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:58,656 INFO L225 Difference]: With dead ends: 427 [2020-08-22 23:01:58,657 INFO L226 Difference]: Without dead ends: 336 [2020-08-22 23:01:58,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:01:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-08-22 23:01:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 199. [2020-08-22 23:01:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-22 23:01:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 217 transitions. [2020-08-22 23:01:58,696 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 217 transitions. Word has length 121 [2020-08-22 23:01:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:58,697 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 217 transitions. [2020-08-22 23:01:58,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:01:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 217 transitions. [2020-08-22 23:01:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 23:01:58,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:58,700 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:01:58,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:01:58,701 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:58,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash 454539305, now seen corresponding path program 1 times [2020-08-22 23:01:58,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:58,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996625841] [2020-08-22 23:01:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:58,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:58,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 23:01:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:01:58,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996625841] [2020-08-22 23:01:58,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:58,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:01:58,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279863258] [2020-08-22 23:01:58,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:01:58,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:01:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:01:58,790 INFO L87 Difference]: Start difference. First operand 199 states and 217 transitions. Second operand 4 states. [2020-08-22 23:01:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:58,949 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2020-08-22 23:01:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 23:01:58,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-08-22 23:01:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:58,951 INFO L225 Difference]: With dead ends: 289 [2020-08-22 23:01:58,951 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 23:01:58,952 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 [2020-08-22 23:01:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 23:01:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-08-22 23:01:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 23:01:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 217 transitions. [2020-08-22 23:01:58,967 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 217 transitions. Word has length 124 [2020-08-22 23:01:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:58,967 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 217 transitions. [2020-08-22 23:01:58,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:01:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 217 transitions. [2020-08-22 23:01:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 23:01:58,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:58,969 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:01:58,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:01:58,970 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1684557317, now seen corresponding path program 1 times [2020-08-22 23:01:58,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:58,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338417133] [2020-08-22 23:01:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:59,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:59,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 23:01:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:01:59,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338417133] [2020-08-22 23:01:59,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:59,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 23:01:59,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066247345] [2020-08-22 23:01:59,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:01:59,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:01:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:01:59,184 INFO L87 Difference]: Start difference. First operand 200 states and 217 transitions. Second operand 10 states. [2020-08-22 23:01:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:59,812 INFO L93 Difference]: Finished difference Result 499 states and 555 transitions. [2020-08-22 23:01:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:01:59,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 23:01:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:59,816 INFO L225 Difference]: With dead ends: 499 [2020-08-22 23:01:59,816 INFO L226 Difference]: Without dead ends: 406 [2020-08-22 23:01:59,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:01:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-08-22 23:01:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 204. [2020-08-22 23:01:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 23:01:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 221 transitions. [2020-08-22 23:01:59,836 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 221 transitions. Word has length 124 [2020-08-22 23:01:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:59,836 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 221 transitions. [2020-08-22 23:01:59,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:01:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 221 transitions. [2020-08-22 23:01:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 23:01:59,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:59,839 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:01:59,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:01:59,839 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1120204730, now seen corresponding path program 1 times [2020-08-22 23:01:59,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:59,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973082757] [2020-08-22 23:01:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:00,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:00,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 23:02:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:02:00,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973082757] [2020-08-22 23:02:00,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:00,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 23:02:00,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819634795] [2020-08-22 23:02:00,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:02:00,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:00,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:02:00,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:02:00,078 INFO L87 Difference]: Start difference. First operand 204 states and 221 transitions. Second operand 10 states. [2020-08-22 23:02:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:00,651 INFO L93 Difference]: Finished difference Result 450 states and 497 transitions. [2020-08-22 23:02:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 23:02:00,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-08-22 23:02:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:00,654 INFO L225 Difference]: With dead ends: 450 [2020-08-22 23:02:00,654 INFO L226 Difference]: Without dead ends: 346 [2020-08-22 23:02:00,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:02:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-22 23:02:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 214. [2020-08-22 23:02:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-22 23:02:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 233 transitions. [2020-08-22 23:02:00,678 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 233 transitions. Word has length 126 [2020-08-22 23:02:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:00,678 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 233 transitions. [2020-08-22 23:02:00,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:02:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 233 transitions. [2020-08-22 23:02:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-22 23:02:00,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:00,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:02:00,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 23:02:00,681 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2135603949, now seen corresponding path program 1 times [2020-08-22 23:02:00,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:00,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664693038] [2020-08-22 23:02:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:00,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:00,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-22 23:02:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:02:00,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664693038] [2020-08-22 23:02:00,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:00,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 23:02:00,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425204311] [2020-08-22 23:02:00,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:02:00,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:02:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:02:00,833 INFO L87 Difference]: Start difference. First operand 214 states and 233 transitions. Second operand 12 states. [2020-08-22 23:02:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:01,429 INFO L93 Difference]: Finished difference Result 488 states and 541 transitions. [2020-08-22 23:02:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 23:02:01,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-08-22 23:02:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:01,433 INFO L225 Difference]: With dead ends: 488 [2020-08-22 23:02:01,433 INFO L226 Difference]: Without dead ends: 384 [2020-08-22 23:02:01,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:02:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-08-22 23:02:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 195. [2020-08-22 23:02:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 23:02:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 211 transitions. [2020-08-22 23:02:01,448 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 211 transitions. Word has length 129 [2020-08-22 23:02:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:01,449 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 211 transitions. [2020-08-22 23:02:01,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:02:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 211 transitions. [2020-08-22 23:02:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 23:02:01,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:01,451 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:02:01,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 23:02:01,451 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash -374659365, now seen corresponding path program 1 times [2020-08-22 23:02:01,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:01,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593049609] [2020-08-22 23:02:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:01,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:01,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 23:02:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:02:01,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593049609] [2020-08-22 23:02:01,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:01,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:02:01,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17297201] [2020-08-22 23:02:01,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:02:01,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:02:01,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:02:01,562 INFO L87 Difference]: Start difference. First operand 195 states and 211 transitions. Second operand 8 states. [2020-08-22 23:02:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:02,103 INFO L93 Difference]: Finished difference Result 454 states and 505 transitions. [2020-08-22 23:02:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:02:02,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-22 23:02:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:02,107 INFO L225 Difference]: With dead ends: 454 [2020-08-22 23:02:02,107 INFO L226 Difference]: Without dead ends: 361 [2020-08-22 23:02:02,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:02:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-08-22 23:02:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2020-08-22 23:02:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 23:02:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 284 transitions. [2020-08-22 23:02:02,134 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 284 transitions. Word has length 131 [2020-08-22 23:02:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:02,135 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 284 transitions. [2020-08-22 23:02:02,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:02:02,135 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 284 transitions. [2020-08-22 23:02:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 23:02:02,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:02,138 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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, 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] [2020-08-22 23:02:02,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 23:02:02,139 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:02,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1298582752, now seen corresponding path program 1 times [2020-08-22 23:02:02,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:02,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138774428] [2020-08-22 23:02:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 23:02:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-08-22 23:02:02,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138774428] [2020-08-22 23:02:02,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:02,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:02:02,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984321698] [2020-08-22 23:02:02,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:02:02,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:02:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:02:02,213 INFO L87 Difference]: Start difference. First operand 258 states and 284 transitions. Second operand 4 states. [2020-08-22 23:02:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:02,380 INFO L93 Difference]: Finished difference Result 375 states and 415 transitions. [2020-08-22 23:02:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 23:02:02,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-08-22 23:02:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:02,384 INFO L225 Difference]: With dead ends: 375 [2020-08-22 23:02:02,384 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 23:02:02,385 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 [2020-08-22 23:02:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 23:02:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-08-22 23:02:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-08-22 23:02:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2020-08-22 23:02:02,402 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 131 [2020-08-22 23:02:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:02,403 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2020-08-22 23:02:02,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:02:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2020-08-22 23:02:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-22 23:02:02,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:02,405 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 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, 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] [2020-08-22 23:02:02,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 23:02:02,405 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:02,406 INFO L82 PathProgramCache]: Analyzing trace with hash -729212679, now seen corresponding path program 1 times [2020-08-22 23:02:02,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:02,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182797226] [2020-08-22 23:02:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 23:02:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-08-22 23:02:02,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182797226] [2020-08-22 23:02:02,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:02,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 23:02:02,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609022242] [2020-08-22 23:02:02,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:02:02,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:02:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:02:02,510 INFO L87 Difference]: Start difference. First operand 259 states and 283 transitions. Second operand 6 states. [2020-08-22 23:02:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:02,735 INFO L93 Difference]: Finished difference Result 259 states and 283 transitions. [2020-08-22 23:02:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:02:02,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-08-22 23:02:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:02,737 INFO L225 Difference]: With dead ends: 259 [2020-08-22 23:02:02,737 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:02:02,739 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 [2020-08-22 23:02:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:02:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:02:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:02:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:02:02,740 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 132 [2020-08-22 23:02:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:02,740 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:02:02,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:02:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:02:02,740 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:02:02,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:02:02,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:02:03,851 INFO L271 CegarLoopResult]: At program point L60(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,852 INFO L271 CegarLoopResult]: At program point L60-1(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,852 INFO L271 CegarLoopResult]: At program point L60-2(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,853 INFO L271 CegarLoopResult]: At program point L60-4(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,854 INFO L271 CegarLoopResult]: At program point L60-5(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,854 INFO L271 CegarLoopResult]: At program point L60-6(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,854 INFO L271 CegarLoopResult]: At program point L60-7(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,854 INFO L271 CegarLoopResult]: At program point L60-8(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,854 INFO L271 CegarLoopResult]: At program point L60-9(line 60) the Hoare annotation is: true [2020-08-22 23:02:03,854 INFO L271 CegarLoopResult]: At program point L52-1(lines 52 73) the Hoare annotation is: true [2020-08-22 23:02:03,855 INFO L264 CegarLoopResult]: At program point L60-11(line 60) the Hoare annotation is: (or (and (<= parse_expression_list_~i~0 0) (<= (+ parse_expression_list_~j~0 1) 0) (= parse_expression_list_~start~0 0)) (not |parse_expression_list_#t~short17|)) [2020-08-22 23:02:03,855 INFO L271 CegarLoopResult]: At program point L52-3(lines 52 73) the Hoare annotation is: true [2020-08-22 23:02:03,856 INFO L264 CegarLoopResult]: At program point L60-12(line 60) the Hoare annotation is: (or (and (<= parse_expression_list_~i~0 0) (<= (+ parse_expression_list_~j~0 1) 0) (= parse_expression_list_~start~0 0)) (not |parse_expression_list_#t~short17|)) [2020-08-22 23:02:03,856 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-08-22 23:02:03,856 INFO L271 CegarLoopResult]: At program point L60-13(lines 54 72) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L69(line 69) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L53(line 53) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L53-1(line 53) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L62(lines 62 64) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L54(line 54) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L54-1(line 54) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L54-2(lines 54 72) the Hoare annotation is: true [2020-08-22 23:02:03,857 INFO L271 CegarLoopResult]: At program point L54-3(line 54) the Hoare annotation is: true [2020-08-22 23:02:03,858 INFO L271 CegarLoopResult]: At program point L63(line 63) the Hoare annotation is: true [2020-08-22 23:02:03,858 INFO L271 CegarLoopResult]: At program point L55(line 55) the Hoare annotation is: true [2020-08-22 23:02:03,858 INFO L271 CegarLoopResult]: At program point L56-1(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,858 INFO L271 CegarLoopResult]: At program point L56-2(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,859 INFO L271 CegarLoopResult]: At program point L56-4(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,859 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,859 INFO L271 CegarLoopResult]: At program point L56-6(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,859 INFO L271 CegarLoopResult]: At program point L56-7(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,859 INFO L271 CegarLoopResult]: At program point L56-8(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,860 INFO L271 CegarLoopResult]: At program point L56-9(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,860 INFO L264 CegarLoopResult]: At program point L56-11(line 56) the Hoare annotation is: |parse_expression_list_#t~short7| [2020-08-22 23:02:03,860 INFO L264 CegarLoopResult]: At program point L56-12(line 56) the Hoare annotation is: |parse_expression_list_#t~short7| [2020-08-22 23:02:03,860 INFO L264 CegarLoopResult]: At program point L56-13(line 56) the Hoare annotation is: |parse_expression_list_#t~short7| [2020-08-22 23:02:03,860 INFO L271 CegarLoopResult]: At program point L56-14(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,860 INFO L271 CegarLoopResult]: At program point L56-15(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,861 INFO L271 CegarLoopResult]: At program point L73(lines 52 73) the Hoare annotation is: true [2020-08-22 23:02:03,861 INFO L271 CegarLoopResult]: At program point L56-16(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,861 INFO L271 CegarLoopResult]: At program point L73-1(line 73) the Hoare annotation is: true [2020-08-22 23:02:03,861 INFO L271 CegarLoopResult]: At program point L56-17(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,861 INFO L271 CegarLoopResult]: At program point L73-2(line 73) the Hoare annotation is: true [2020-08-22 23:02:03,861 INFO L271 CegarLoopResult]: At program point L56-18(line 56) the Hoare annotation is: true [2020-08-22 23:02:03,862 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-22 23:02:03,862 INFO L264 CegarLoopResult]: At program point L65-1(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-22 23:02:03,862 INFO L271 CegarLoopResult]: At program point L57(line 57) the Hoare annotation is: true [2020-08-22 23:02:03,863 INFO L271 CegarLoopResult]: At program point L57-1(line 57) the Hoare annotation is: true [2020-08-22 23:02:03,863 INFO L271 CegarLoopResult]: At program point L57-2(line 57) the Hoare annotation is: true [2020-08-22 23:02:03,863 INFO L271 CegarLoopResult]: At program point L57-3(line 57) the Hoare annotation is: true [2020-08-22 23:02:03,863 INFO L271 CegarLoopResult]: At program point L57-4(line 57) the Hoare annotation is: true [2020-08-22 23:02:03,864 INFO L271 CegarLoopResult]: At program point L57-6(line 57) the Hoare annotation is: true [2020-08-22 23:02:03,864 INFO L271 CegarLoopResult]: At program point L57-7(line 57) the Hoare annotation is: true [2020-08-22 23:02:03,864 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 23:02:03,864 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (and (= |old(#valid)| |#valid|) (= parse_expression_list_~start~0 0)) [2020-08-22 23:02:03,864 INFO L264 CegarLoopResult]: At program point L49-2(line 49) the Hoare annotation is: (and (<= (+ parse_expression_list_~i~0 1) 0) (= |old(#valid)| |#valid|) (= parse_expression_list_~start~0 0)) [2020-08-22 23:02:03,865 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-22 23:02:03,865 INFO L264 CegarLoopResult]: At program point L66-1(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-22 23:02:03,865 INFO L271 CegarLoopResult]: At program point parse_expression_listFINAL(lines 47 75) the Hoare annotation is: true [2020-08-22 23:02:03,865 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 23:02:03,865 INFO L264 CegarLoopResult]: At program point L50(line 50) the Hoare annotation is: (and (<= (+ parse_expression_list_~i~0 1) 0) (<= (+ parse_expression_list_~j~0 1) 0) (= |old(#valid)| |#valid|) (= parse_expression_list_~start~0 0)) [2020-08-22 23:02:03,866 INFO L264 CegarLoopResult]: At program point L50-1(lines 48 75) the Hoare annotation is: (and (<= (+ parse_expression_list_~i~0 1) 0) (<= (+ parse_expression_list_~j~0 1) 0) (= parse_expression_list_~start~0 0)) [2020-08-22 23:02:03,866 INFO L271 CegarLoopResult]: At program point L50-2(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,866 INFO L271 CegarLoopResult]: At program point L50-3(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,867 INFO L271 CegarLoopResult]: At program point L50-4(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,867 INFO L271 CegarLoopResult]: At program point L50-5(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,868 INFO L271 CegarLoopResult]: At program point L50-6(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,868 INFO L271 CegarLoopResult]: At program point L50-7(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,868 INFO L271 CegarLoopResult]: At program point L50-8(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,868 INFO L271 CegarLoopResult]: At program point L50-9(line 50) the Hoare annotation is: true [2020-08-22 23:02:03,868 INFO L264 CegarLoopResult]: At program point L67(lines 61 70) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-22 23:02:03,868 INFO L271 CegarLoopResult]: At program point parse_expression_listEXIT(lines 47 75) the Hoare annotation is: true [2020-08-22 23:02:03,868 INFO L271 CegarLoopResult]: At program point L59-1(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,869 INFO L264 CegarLoopResult]: At program point L59-2(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,869 INFO L264 CegarLoopResult]: At program point L59-3(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,869 INFO L264 CegarLoopResult]: At program point L59-4(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,869 INFO L264 CegarLoopResult]: At program point L59-6(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,869 INFO L264 CegarLoopResult]: At program point L59-7(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,869 INFO L271 CegarLoopResult]: At program point L51(line 51) the Hoare annotation is: true [2020-08-22 23:02:03,870 INFO L264 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,870 INFO L271 CegarLoopResult]: At program point L59-10(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,870 INFO L264 CegarLoopResult]: At program point L59-11(line 59) the Hoare annotation is: (or (not |parse_expression_list_#t~short14|) (and (<= parse_expression_list_~i~0 0) (<= (+ parse_expression_list_~j~0 1) 0) (= parse_expression_list_~start~0 0)) (and (<= (+ parse_expression_list_~i~0 1) parse_expression_list_~start~0) (<= (+ parse_expression_list_~j~0 2) parse_expression_list_~start~0))) [2020-08-22 23:02:03,870 INFO L264 CegarLoopResult]: At program point L59-12(line 59) the Hoare annotation is: (or (not |parse_expression_list_#t~short14|) (and (<= parse_expression_list_~i~0 0) (<= (+ parse_expression_list_~j~0 1) 0) (= parse_expression_list_~start~0 0)) (and (<= (+ parse_expression_list_~i~0 1) parse_expression_list_~start~0) (<= (+ parse_expression_list_~j~0 2) parse_expression_list_~start~0))) [2020-08-22 23:02:03,870 INFO L271 CegarLoopResult]: At program point L59-13(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,870 INFO L271 CegarLoopResult]: At program point L59-14(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,871 INFO L264 CegarLoopResult]: At program point L59-16(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,871 INFO L264 CegarLoopResult]: At program point L59-17(line 59) the Hoare annotation is: (or (<= (+ parse_expression_list_~j~0 1) parse_expression_list_~start~0) |parse_expression_list_#t~short14|) [2020-08-22 23:02:03,872 INFO L271 CegarLoopResult]: At program point L59-18(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,873 INFO L271 CegarLoopResult]: At program point L59-19(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,873 INFO L271 CegarLoopResult]: At program point L59-20(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,873 INFO L271 CegarLoopResult]: At program point L59-21(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,873 INFO L271 CegarLoopResult]: At program point L59-22(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,874 INFO L271 CegarLoopResult]: At program point L59-23(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,874 INFO L271 CegarLoopResult]: At program point L59-24(line 59) the Hoare annotation is: true [2020-08-22 23:02:03,874 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,874 INFO L271 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,874 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,874 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|)) [2020-08-22 23:02:03,875 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,875 INFO L271 CegarLoopResult]: At program point r_strncpyFINAL(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,875 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,875 INFO L271 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,875 INFO L271 CegarLoopResult]: At program point L31-2(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,875 INFO L271 CegarLoopResult]: At program point r_strncpyEXIT(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,875 INFO L271 CegarLoopResult]: At program point L31-3(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point L31-4(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 76 85) the Hoare annotation is: true [2020-08-22 23:02:03,876 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-08-22 23:02:03,877 INFO L271 CegarLoopResult]: At program point L83-1(line 83) the Hoare annotation is: true [2020-08-22 23:02:03,877 INFO L264 CegarLoopResult]: At program point L79-2(lines 79 81) the Hoare annotation is: (<= main_~i~1 7) [2020-08-22 23:02:03,877 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 76 85) the Hoare annotation is: true [2020-08-22 23:02:03,877 INFO L264 CegarLoopResult]: At program point L79-3(line 79) the Hoare annotation is: (<= main_~i~1 7) [2020-08-22 23:02:03,877 INFO L271 CegarLoopResult]: At program point L79-4(line 79) the Hoare annotation is: true [2020-08-22 23:02:03,877 INFO L271 CegarLoopResult]: At program point L79-5(lines 79 81) the Hoare annotation is: true [2020-08-22 23:02:03,877 INFO L271 CegarLoopResult]: At program point L79-6(lines 79 81) the Hoare annotation is: true [2020-08-22 23:02:03,878 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-22 23:02:03,878 INFO L271 CegarLoopResult]: At program point L84(line 84) the Hoare annotation is: true [2020-08-22 23:02:03,879 INFO L271 CegarLoopResult]: At program point L82(line 82) the Hoare annotation is: true [2020-08-22 23:02:03,879 INFO L264 CegarLoopResult]: At program point L80(line 80) the Hoare annotation is: (<= main_~i~1 7) [2020-08-22 23:02:03,880 INFO L264 CegarLoopResult]: At program point L80-1(line 80) the Hoare annotation is: (<= main_~i~1 7) [2020-08-22 23:02:03,880 INFO L271 CegarLoopResult]: At program point L78(line 78) the Hoare annotation is: true [2020-08-22 23:02:03,880 INFO L264 CegarLoopResult]: At program point L80-2(line 80) the Hoare annotation is: (<= main_~i~1 7) [2020-08-22 23:02:03,880 INFO L271 CegarLoopResult]: At program point L78-1(line 78) the Hoare annotation is: true [2020-08-22 23:02:03,881 INFO L271 CegarLoopResult]: At program point L78-2(line 78) the Hoare annotation is: true [2020-08-22 23:02:03,881 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 23:02:03,881 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:02:03,881 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:02:03,881 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:02:03,882 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:02:03,882 INFO L264 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 23:02:03,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:02:03 BoogieIcfgContainer [2020-08-22 23:02:03,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:02:03,912 INFO L168 Benchmark]: Toolchain (without parser) took 12470.77 ms. Allocated memory was 138.9 MB in the beginning and 386.9 MB in the end (delta: 248.0 MB). Free memory was 102.7 MB in the beginning and 193.7 MB in the end (delta: -90.9 MB). Peak memory consumption was 220.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:03,914 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 23:02:03,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.52 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.3 MB in the beginning and 180.3 MB in the end (delta: -78.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:03,920 INFO L168 Benchmark]: Boogie Preprocessor took 48.38 ms. Allocated memory is still 203.4 MB. Free memory was 180.3 MB in the beginning and 178.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:03,922 INFO L168 Benchmark]: RCFGBuilder took 666.72 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 142.9 MB in the end (delta: 35.4 MB). Peak memory consumption was 35.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:03,923 INFO L168 Benchmark]: TraceAbstraction took 11331.21 ms. Allocated memory was 203.4 MB in the beginning and 386.9 MB in the end (delta: 183.5 MB). Free memory was 142.9 MB in the beginning and 193.7 MB in the end (delta: -50.7 MB). Peak memory consumption was 195.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:02:03,930 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 417.52 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.3 MB in the beginning and 180.3 MB in the end (delta: -78.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.38 ms. Allocated memory is still 203.4 MB. Free memory was 180.3 MB in the beginning and 178.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 666.72 ms. Allocated memory is still 203.4 MB. Free memory was 178.3 MB in the beginning and 142.9 MB in the end (delta: 35.4 MB). Peak memory consumption was 35.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11331.21 ms. Allocated memory was 203.4 MB in the beginning and 386.9 MB in the end (delta: 183.5 MB). Free memory was 142.9 MB in the beginning and 193.7 MB in the end (delta: -50.7 MB). Peak memory consumption was 195.7 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: 52]: 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: 79]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 47]: Procedure Contract for parse_expression_list Derived contract for procedure parse_expression_list: 1 - ProcedureContractResult [Line: 31]: Procedure Contract for r_strncpy Derived contract for procedure r_strncpy: 1 - ProcedureContractResult [Line: 76]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 135 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.1s, OverallIterations: 18, TraceHistogramMax: 8, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2217 SDtfs, 2153 SDslu, 6886 SDs, 0 SdLazy, 4320 SolverSat, 204 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 798 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 135 LocationsWithAnnotation, 1219 PreInvPairs, 1604 NumberOfFragments, 377 HoareAnnotationTreeSize, 1219 FomulaSimplifications, 12011 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 135 FomulaSimplificationsInter, 318 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 1888 NumberOfCodeBlocks, 1888 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1870 ConstructedInterpolants, 0 QuantifiedInterpolants, 401187 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 10 PerfectInterpolantSequences, 1845/2269 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...