/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 0.1.25-3af5e1f [2020-09-04 23:11:06,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:11:06,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:11:06,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:11:06,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:11:06,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:11:06,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:11:06,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:11:06,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:11:06,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:11:06,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:11:06,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:11:06,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:11:06,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:11:06,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:11:06,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:11:06,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:11:06,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:11:06,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:11:06,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:11:06,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:11:06,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:11:06,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:11:06,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:11:06,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:11:06,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:11:06,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:11:06,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:11:06,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:11:06,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:11:06,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:11:06,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:11:06,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:11:06,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:11:06,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:11:06,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:11:06,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:11:06,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:11:06,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:11:06,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:11:06,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:11:06,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:11:06,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:11:06,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:11:06,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:11:06,515 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:11:06,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:11:06,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:11:06,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:11:06,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:11:06,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:11:06,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:11:06,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:11:06,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:11:06,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:11:06,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:11:06,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:11:06,518 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:11:06,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:11:06,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:11:06,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:06,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:11:06,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:11:06,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:11:06,519 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 [2020-09-04 23:11:07,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:11:07,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:11:07,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:11:07,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:11:07,053 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:11:07,054 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-04 23:11:07,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07d63a127/522c785639cc49f5a4e722cc3e0fbd76/FLAGa3551bb50 [2020-09-04 23:11:07,707 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:11:07,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-04 23:11:07,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07d63a127/522c785639cc49f5a4e722cc3e0fbd76/FLAGa3551bb50 [2020-09-04 23:11:08,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07d63a127/522c785639cc49f5a4e722cc3e0fbd76 [2020-09-04 23:11:08,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:11:08,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:11:08,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:08,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:11:08,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:11:08,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc3fb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08, skipping insertion in model container [2020-09-04 23:11:08,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:11:08,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:11:08,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:08,386 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:11:08,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:08,555 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:11:08,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08 WrapperNode [2020-09-04 23:11:08,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:08,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:11:08,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:11:08,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:11:08,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... [2020-09-04 23:11:08,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:11:08,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:11:08,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:11:08,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:11:08,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:11:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:11:08,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:11:08,695 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-04 23:11:08,695 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-04 23:11:08,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:11:08,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:11:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 23:11:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:11:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-04 23:11:08,696 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-04 23:11:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-04 23:11:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-04 23:11:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-04 23:11:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-04 23:11:08,697 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-04 23:11:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-04 23:11:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-04 23:11:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-04 23:11:08,698 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-04 23:11:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-04 23:11:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-04 23:11:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-04 23:11:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-04 23:11:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-04 23:11:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-04 23:11:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-04 23:11:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-04 23:11:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-04 23:11:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-04 23:11:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-04 23:11:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-04 23:11:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-04 23:11:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-04 23:11:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-04 23:11:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:11:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:11:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:11:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:11:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:11:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:11:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:11:09,233 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:11:09,234 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-04 23:11:09,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:09 BoogieIcfgContainer [2020-09-04 23:11:09,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:11:09,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:11:09,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:11:09,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:11:09,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:11:08" (1/3) ... [2020-09-04 23:11:09,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cd7e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:09, skipping insertion in model container [2020-09-04 23:11:09,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:08" (2/3) ... [2020-09-04 23:11:09,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cd7e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:09, skipping insertion in model container [2020-09-04 23:11:09,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:09" (3/3) ... [2020-09-04 23:11:09,261 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-04 23:11:09,274 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:11:09,288 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:11:09,313 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:11:09,346 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:11:09,346 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:11:09,347 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:11:09,347 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:11:09,347 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:11:09,347 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:11:09,347 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:11:09,347 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:11:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-09-04 23:11:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 23:11:09,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:09,385 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] [2020-09-04 23:11:09,386 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:09,395 INFO L82 PathProgramCache]: Analyzing trace with hash 593727157, now seen corresponding path program 1 times [2020-09-04 23:11:09,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:09,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185147475] [2020-09-04 23:11:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:09,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:09,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 23:11:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:09,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185147475] [2020-09-04 23:11:09,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:09,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:11:09,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637327732] [2020-09-04 23:11:09,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:11:09,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:11:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:11:09,687 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-09-04 23:11:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:10,028 INFO L93 Difference]: Finished difference Result 254 states and 290 transitions. [2020-09-04 23:11:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:11:10,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-09-04 23:11:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:10,044 INFO L225 Difference]: With dead ends: 254 [2020-09-04 23:11:10,044 INFO L226 Difference]: Without dead ends: 111 [2020-09-04 23:11:10,050 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 [2020-09-04 23:11:10,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-04 23:11:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-09-04 23:11:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-04 23:11:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-09-04 23:11:10,130 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 51 [2020-09-04 23:11:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:10,130 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-09-04 23:11:10,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:11:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-09-04 23:11:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-04 23:11:10,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:10,134 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] [2020-09-04 23:11:10,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:11:10,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:10,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1128985001, now seen corresponding path program 1 times [2020-09-04 23:11:10,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:10,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316333783] [2020-09-04 23:11:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:10,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:10,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 23:11:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:10,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316333783] [2020-09-04 23:11:10,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:10,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:11:10,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960267661] [2020-09-04 23:11:10,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:11:10,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:10,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:11:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:10,293 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 4 states. [2020-09-04 23:11:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:10,551 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2020-09-04 23:11:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:11:10,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-09-04 23:11:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:10,554 INFO L225 Difference]: With dead ends: 212 [2020-09-04 23:11:10,554 INFO L226 Difference]: Without dead ends: 117 [2020-09-04 23:11:10,556 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 [2020-09-04 23:11:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-04 23:11:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-09-04 23:11:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-04 23:11:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-09-04 23:11:10,572 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 63 [2020-09-04 23:11:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:10,573 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-09-04 23:11:10,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:11:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-09-04 23:11:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-04 23:11:10,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:10,576 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] [2020-09-04 23:11:10,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:11:10,577 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1210839627, now seen corresponding path program 1 times [2020-09-04 23:11:10,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:10,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805087100] [2020-09-04 23:11:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:10,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:10,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 23:11:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:10,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805087100] [2020-09-04 23:11:10,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:10,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:11:10,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737293976] [2020-09-04 23:11:10,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:11:10,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:10,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:11:10,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:11:10,694 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 6 states. [2020-09-04 23:11:10,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:10,952 INFO L93 Difference]: Finished difference Result 219 states and 239 transitions. [2020-09-04 23:11:10,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:11:10,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-09-04 23:11:10,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:10,955 INFO L225 Difference]: With dead ends: 219 [2020-09-04 23:11:10,955 INFO L226 Difference]: Without dead ends: 124 [2020-09-04 23:11:10,956 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 [2020-09-04 23:11:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-04 23:11:10,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-09-04 23:11:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-04 23:11:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-09-04 23:11:10,972 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 70 [2020-09-04 23:11:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:10,972 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-09-04 23:11:10,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:11:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-09-04 23:11:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-04 23:11:10,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:10,976 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] [2020-09-04 23:11:10,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:11:10,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:10,977 INFO L82 PathProgramCache]: Analyzing trace with hash -257337495, now seen corresponding path program 2 times [2020-09-04 23:11:10,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:10,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83924629] [2020-09-04 23:11:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 23:11:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:11,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83924629] [2020-09-04 23:11:11,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:11,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:11:11,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806610257] [2020-09-04 23:11:11,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:11:11,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:11:11,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:11,137 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 8 states. [2020-09-04 23:11:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:11,454 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2020-09-04 23:11:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:11:11,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-09-04 23:11:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:11,456 INFO L225 Difference]: With dead ends: 226 [2020-09-04 23:11:11,456 INFO L226 Difference]: Without dead ends: 131 [2020-09-04 23:11:11,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-04 23:11:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-09-04 23:11:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-04 23:11:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-09-04 23:11:11,476 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 77 [2020-09-04 23:11:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:11,477 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-09-04 23:11:11,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:11:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-09-04 23:11:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-04 23:11:11,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:11,479 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] [2020-09-04 23:11:11,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:11:11,480 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:11,480 INFO L82 PathProgramCache]: Analyzing trace with hash 883135627, now seen corresponding path program 3 times [2020-09-04 23:11:11,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:11,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955913245] [2020-09-04 23:11:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 23:11:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:11,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955913245] [2020-09-04 23:11:11,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:11,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:11:11,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045057040] [2020-09-04 23:11:11,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:11:11,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:11,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:11:11,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:11:11,661 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand 10 states. [2020-09-04 23:11:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:11,998 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-09-04 23:11:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:11:11,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-09-04 23:11:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:12,000 INFO L225 Difference]: With dead ends: 233 [2020-09-04 23:11:12,000 INFO L226 Difference]: Without dead ends: 138 [2020-09-04 23:11:12,002 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 [2020-09-04 23:11:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-04 23:11:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-09-04 23:11:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-04 23:11:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-09-04 23:11:12,017 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 84 [2020-09-04 23:11:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:12,018 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-09-04 23:11:12,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:11:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-09-04 23:11:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 23:11:12,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:12,020 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] [2020-09-04 23:11:12,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:11:12,021 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:12,021 INFO L82 PathProgramCache]: Analyzing trace with hash -687690455, now seen corresponding path program 4 times [2020-09-04 23:11:12,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:12,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668420845] [2020-09-04 23:11:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:12,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:12,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-04 23:11:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:12,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668420845] [2020-09-04 23:11:12,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:12,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:11:12,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143707417] [2020-09-04 23:11:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:11:12,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:11:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:12,226 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 12 states. [2020-09-04 23:11:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:12,637 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2020-09-04 23:11:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 23:11:12,637 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-09-04 23:11:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:12,639 INFO L225 Difference]: With dead ends: 240 [2020-09-04 23:11:12,639 INFO L226 Difference]: Without dead ends: 145 [2020-09-04 23:11:12,640 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 [2020-09-04 23:11:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-04 23:11:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-09-04 23:11:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-04 23:11:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-09-04 23:11:12,654 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 91 [2020-09-04 23:11:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:12,654 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-09-04 23:11:12,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:11:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-09-04 23:11:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-04 23:11:12,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:12,656 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] [2020-09-04 23:11:12,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:11:12,657 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:12,657 INFO L82 PathProgramCache]: Analyzing trace with hash -722319669, now seen corresponding path program 5 times [2020-09-04 23:11:12,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:12,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406077911] [2020-09-04 23:11:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:12,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:12,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-04 23:11:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:12,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406077911] [2020-09-04 23:11:12,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:12,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 23:11:12,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279231688] [2020-09-04 23:11:12,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 23:11:12,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 23:11:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:11:12,927 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 14 states. [2020-09-04 23:11:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:13,362 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2020-09-04 23:11:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:11:13,363 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-09-04 23:11:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:13,366 INFO L225 Difference]: With dead ends: 247 [2020-09-04 23:11:13,366 INFO L226 Difference]: Without dead ends: 152 [2020-09-04 23:11:13,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:11:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-04 23:11:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-09-04 23:11:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-04 23:11:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-09-04 23:11:13,397 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 98 [2020-09-04 23:11:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:13,398 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-09-04 23:11:13,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 23:11:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-09-04 23:11:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-04 23:11:13,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:13,399 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] [2020-09-04 23:11:13,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:11:13,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1819472617, now seen corresponding path program 6 times [2020-09-04 23:11:13,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:13,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267809345] [2020-09-04 23:11:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:13,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:13,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-04 23:11:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:13,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267809345] [2020-09-04 23:11:13,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:13,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 23:11:13,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523007910] [2020-09-04 23:11:13,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 23:11:13,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:13,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 23:11:13,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:11:13,626 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-09-04 23:11:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:14,149 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2020-09-04 23:11:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 23:11:14,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-09-04 23:11:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:14,152 INFO L225 Difference]: With dead ends: 254 [2020-09-04 23:11:14,153 INFO L226 Difference]: Without dead ends: 159 [2020-09-04 23:11:14,156 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 [2020-09-04 23:11:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-04 23:11:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-09-04 23:11:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-04 23:11:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-09-04 23:11:14,169 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 105 [2020-09-04 23:11:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:14,170 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-09-04 23:11:14,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 23:11:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-09-04 23:11:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-04 23:11:14,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:14,189 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] [2020-09-04 23:11:14,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:11:14,200 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash -612628213, now seen corresponding path program 7 times [2020-09-04 23:11:14,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:14,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984929005] [2020-09-04 23:11:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:14,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:14,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-04 23:11:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:14,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984929005] [2020-09-04 23:11:14,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:14,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:11:14,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553303756] [2020-09-04 23:11:14,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:11:14,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:14,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:11:14,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:11:14,484 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 18 states. [2020-09-04 23:11:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:14,947 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2020-09-04 23:11:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 23:11:14,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-09-04 23:11:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:14,950 INFO L225 Difference]: With dead ends: 256 [2020-09-04 23:11:14,950 INFO L226 Difference]: Without dead ends: 161 [2020-09-04 23:11:14,952 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 [2020-09-04 23:11:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-04 23:11:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-09-04 23:11:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-04 23:11:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2020-09-04 23:11:14,961 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 112 [2020-09-04 23:11:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:14,962 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2020-09-04 23:11:14,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:11:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2020-09-04 23:11:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-04 23:11:14,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:14,964 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] [2020-09-04 23:11:14,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:11:14,964 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1175857321, now seen corresponding path program 8 times [2020-09-04 23:11:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:14,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039200654] [2020-09-04 23:11:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:15,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:15,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-04 23:11:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:15,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039200654] [2020-09-04 23:11:15,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:15,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:11:15,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409815015] [2020-09-04 23:11:15,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:11:15,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:11:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:15,044 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand 4 states. [2020-09-04 23:11:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:15,217 INFO L93 Difference]: Finished difference Result 249 states and 269 transitions. [2020-09-04 23:11:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:11:15,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-09-04 23:11:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:15,219 INFO L225 Difference]: With dead ends: 249 [2020-09-04 23:11:15,219 INFO L226 Difference]: Without dead ends: 162 [2020-09-04 23:11:15,220 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 [2020-09-04 23:11:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-04 23:11:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-09-04 23:11:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 23:11:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2020-09-04 23:11:15,230 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 119 [2020-09-04 23:11:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:15,230 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2020-09-04 23:11:15,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:11:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2020-09-04 23:11:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 23:11:15,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:15,232 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] [2020-09-04 23:11:15,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:11:15,233 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1395739916, now seen corresponding path program 1 times [2020-09-04 23:11:15,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:15,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763458050] [2020-09-04 23:11:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:15,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:15,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-04 23:11:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:15,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763458050] [2020-09-04 23:11:15,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:15,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 23:11:15,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221573713] [2020-09-04 23:11:15,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:11:15,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:15,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:11:15,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:15,367 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand 8 states. [2020-09-04 23:11:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:15,888 INFO L93 Difference]: Finished difference Result 427 states and 473 transitions. [2020-09-04 23:11:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:11:15,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-09-04 23:11:15,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:15,898 INFO L225 Difference]: With dead ends: 427 [2020-09-04 23:11:15,898 INFO L226 Difference]: Without dead ends: 336 [2020-09-04 23:11:15,900 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 [2020-09-04 23:11:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-09-04 23:11:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 199. [2020-09-04 23:11:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-09-04 23:11:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 217 transitions. [2020-09-04 23:11:15,962 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 217 transitions. Word has length 121 [2020-09-04 23:11:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:15,963 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 217 transitions. [2020-09-04 23:11:15,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:11:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 217 transitions. [2020-09-04 23:11:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-04 23:11:15,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:15,972 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] [2020-09-04 23:11:15,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:11:15,973 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:15,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash 454539305, now seen corresponding path program 1 times [2020-09-04 23:11:15,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:15,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11325773] [2020-09-04 23:11:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-04 23:11:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:16,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11325773] [2020-09-04 23:11:16,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:16,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:11:16,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369508533] [2020-09-04 23:11:16,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:11:16,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:11:16,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:16,111 INFO L87 Difference]: Start difference. First operand 199 states and 217 transitions. Second operand 4 states. [2020-09-04 23:11:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:16,396 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2020-09-04 23:11:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:11:16,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-09-04 23:11:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:16,399 INFO L225 Difference]: With dead ends: 289 [2020-09-04 23:11:16,399 INFO L226 Difference]: Without dead ends: 200 [2020-09-04 23:11:16,401 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 [2020-09-04 23:11:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-04 23:11:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-09-04 23:11:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-04 23:11:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 217 transitions. [2020-09-04 23:11:16,420 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 217 transitions. Word has length 124 [2020-09-04 23:11:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:16,420 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 217 transitions. [2020-09-04 23:11:16,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:11:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 217 transitions. [2020-09-04 23:11:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-04 23:11:16,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:16,424 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] [2020-09-04 23:11:16,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:11:16,425 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1684557317, now seen corresponding path program 1 times [2020-09-04 23:11:16,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:16,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478198904] [2020-09-04 23:11:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-04 23:11:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:16,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478198904] [2020-09-04 23:11:16,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:16,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 23:11:16,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290148400] [2020-09-04 23:11:16,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:11:16,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:11:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:11:16,603 INFO L87 Difference]: Start difference. First operand 200 states and 217 transitions. Second operand 10 states. [2020-09-04 23:11:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:17,173 INFO L93 Difference]: Finished difference Result 499 states and 555 transitions. [2020-09-04 23:11:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:11:17,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-09-04 23:11:17,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:17,176 INFO L225 Difference]: With dead ends: 499 [2020-09-04 23:11:17,177 INFO L226 Difference]: Without dead ends: 406 [2020-09-04 23:11:17,178 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 [2020-09-04 23:11:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-09-04 23:11:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 204. [2020-09-04 23:11:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 23:11:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 221 transitions. [2020-09-04 23:11:17,195 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 221 transitions. Word has length 124 [2020-09-04 23:11:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:17,196 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 221 transitions. [2020-09-04 23:11:17,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:11:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 221 transitions. [2020-09-04 23:11:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 23:11:17,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:17,198 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] [2020-09-04 23:11:17,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:11:17,198 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1120204730, now seen corresponding path program 1 times [2020-09-04 23:11:17,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:17,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134137835] [2020-09-04 23:11:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:17,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:17,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-04 23:11:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:17,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134137835] [2020-09-04 23:11:17,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:17,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 23:11:17,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501367964] [2020-09-04 23:11:17,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:11:17,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:11:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:11:17,375 INFO L87 Difference]: Start difference. First operand 204 states and 221 transitions. Second operand 10 states. [2020-09-04 23:11:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:17,926 INFO L93 Difference]: Finished difference Result 450 states and 497 transitions. [2020-09-04 23:11:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 23:11:17,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-09-04 23:11:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:17,929 INFO L225 Difference]: With dead ends: 450 [2020-09-04 23:11:17,929 INFO L226 Difference]: Without dead ends: 346 [2020-09-04 23:11:17,930 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 [2020-09-04 23:11:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-09-04 23:11:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 214. [2020-09-04 23:11:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-04 23:11:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 233 transitions. [2020-09-04 23:11:17,948 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 233 transitions. Word has length 126 [2020-09-04 23:11:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:17,948 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 233 transitions. [2020-09-04 23:11:17,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:11:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 233 transitions. [2020-09-04 23:11:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-04 23:11:17,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:17,950 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] [2020-09-04 23:11:17,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:11:17,951 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2135603949, now seen corresponding path program 1 times [2020-09-04 23:11:17,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:17,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515345848] [2020-09-04 23:11:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:18,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-04 23:11:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:18,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515345848] [2020-09-04 23:11:18,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:18,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 23:11:18,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336911300] [2020-09-04 23:11:18,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:11:18,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:11:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:18,128 INFO L87 Difference]: Start difference. First operand 214 states and 233 transitions. Second operand 12 states. [2020-09-04 23:11:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:18,777 INFO L93 Difference]: Finished difference Result 488 states and 541 transitions. [2020-09-04 23:11:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 23:11:18,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-09-04 23:11:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:18,780 INFO L225 Difference]: With dead ends: 488 [2020-09-04 23:11:18,780 INFO L226 Difference]: Without dead ends: 384 [2020-09-04 23:11:18,781 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 [2020-09-04 23:11:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-09-04 23:11:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 195. [2020-09-04 23:11:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-09-04 23:11:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 211 transitions. [2020-09-04 23:11:18,796 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 211 transitions. Word has length 129 [2020-09-04 23:11:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:18,796 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 211 transitions. [2020-09-04 23:11:18,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:11:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 211 transitions. [2020-09-04 23:11:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 23:11:18,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:18,798 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] [2020-09-04 23:11:18,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:11:18,799 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash -374659365, now seen corresponding path program 1 times [2020-09-04 23:11:18,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:18,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340424289] [2020-09-04 23:11:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:18,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:18,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-04 23:11:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:18,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340424289] [2020-09-04 23:11:18,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:18,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:11:18,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873129806] [2020-09-04 23:11:18,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:11:18,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:11:18,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:18,936 INFO L87 Difference]: Start difference. First operand 195 states and 211 transitions. Second operand 8 states. [2020-09-04 23:11:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:19,482 INFO L93 Difference]: Finished difference Result 454 states and 505 transitions. [2020-09-04 23:11:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:11:19,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-09-04 23:11:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:19,486 INFO L225 Difference]: With dead ends: 454 [2020-09-04 23:11:19,486 INFO L226 Difference]: Without dead ends: 361 [2020-09-04 23:11:19,487 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 [2020-09-04 23:11:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-09-04 23:11:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2020-09-04 23:11:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 23:11:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 284 transitions. [2020-09-04 23:11:19,508 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 284 transitions. Word has length 131 [2020-09-04 23:11:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:19,509 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 284 transitions. [2020-09-04 23:11:19,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:11:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 284 transitions. [2020-09-04 23:11:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 23:11:19,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:19,511 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] [2020-09-04 23:11:19,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:11:19,512 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1298582752, now seen corresponding path program 1 times [2020-09-04 23:11:19,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:19,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104902428] [2020-09-04 23:11:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:19,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:19,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-04 23:11:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-04 23:11:19,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104902428] [2020-09-04 23:11:19,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:19,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:11:19,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088795564] [2020-09-04 23:11:19,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:11:19,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:19,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:11:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:19,604 INFO L87 Difference]: Start difference. First operand 258 states and 284 transitions. Second operand 4 states. [2020-09-04 23:11:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:19,854 INFO L93 Difference]: Finished difference Result 375 states and 415 transitions. [2020-09-04 23:11:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:11:19,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-09-04 23:11:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:19,857 INFO L225 Difference]: With dead ends: 375 [2020-09-04 23:11:19,857 INFO L226 Difference]: Without dead ends: 259 [2020-09-04 23:11:19,858 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 [2020-09-04 23:11:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-04 23:11:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-09-04 23:11:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-09-04 23:11:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2020-09-04 23:11:19,878 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 131 [2020-09-04 23:11:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:19,879 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2020-09-04 23:11:19,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:11:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2020-09-04 23:11:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-04 23:11:19,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:19,882 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] [2020-09-04 23:11:19,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:11:19,883 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash -729212679, now seen corresponding path program 1 times [2020-09-04 23:11:19,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:19,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407935887] [2020-09-04 23:11:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:19,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:19,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-04 23:11:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-04 23:11:20,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407935887] [2020-09-04 23:11:20,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:20,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 23:11:20,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782137722] [2020-09-04 23:11:20,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:11:20,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:20,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:11:20,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:11:20,003 INFO L87 Difference]: Start difference. First operand 259 states and 283 transitions. Second operand 6 states. [2020-09-04 23:11:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:20,218 INFO L93 Difference]: Finished difference Result 259 states and 283 transitions. [2020-09-04 23:11:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:11:20,219 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-09-04 23:11:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:20,220 INFO L225 Difference]: With dead ends: 259 [2020-09-04 23:11:20,220 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:11:20,221 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 [2020-09-04 23:11:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:11:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:11:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:11:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:11:20,222 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 132 [2020-09-04 23:11:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:20,222 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:11:20,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:11:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:11:20,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:11:20,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:11:20,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:11:21,307 INFO L271 CegarLoopResult]: At program point L60(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,308 INFO L271 CegarLoopResult]: At program point L60-1(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,308 INFO L271 CegarLoopResult]: At program point L60-2(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,308 INFO L271 CegarLoopResult]: At program point L60-4(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,308 INFO L271 CegarLoopResult]: At program point L60-5(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,308 INFO L271 CegarLoopResult]: At program point L60-6(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,308 INFO L271 CegarLoopResult]: At program point L60-7(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,309 INFO L271 CegarLoopResult]: At program point L60-8(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,309 INFO L271 CegarLoopResult]: At program point L60-9(line 60) the Hoare annotation is: true [2020-09-04 23:11:21,309 INFO L271 CegarLoopResult]: At program point L52-1(lines 52 73) the Hoare annotation is: true [2020-09-04 23:11:21,309 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|)) [2020-09-04 23:11:21,309 INFO L271 CegarLoopResult]: At program point L52-3(lines 52 73) the Hoare annotation is: true [2020-09-04 23:11:21,310 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|)) [2020-09-04 23:11:21,310 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-09-04 23:11:21,310 INFO L271 CegarLoopResult]: At program point L60-13(lines 54 72) the Hoare annotation is: true [2020-09-04 23:11:21,310 INFO L271 CegarLoopResult]: At program point L69(line 69) the Hoare annotation is: true [2020-09-04 23:11:21,310 INFO L271 CegarLoopResult]: At program point L53(line 53) the Hoare annotation is: true [2020-09-04 23:11:21,310 INFO L271 CegarLoopResult]: At program point L53-1(line 53) the Hoare annotation is: true [2020-09-04 23:11:21,310 INFO L271 CegarLoopResult]: At program point L62(lines 62 64) the Hoare annotation is: true [2020-09-04 23:11:21,311 INFO L271 CegarLoopResult]: At program point L54(line 54) the Hoare annotation is: true [2020-09-04 23:11:21,311 INFO L271 CegarLoopResult]: At program point L54-1(line 54) the Hoare annotation is: true [2020-09-04 23:11:21,311 INFO L271 CegarLoopResult]: At program point L54-2(lines 54 72) the Hoare annotation is: true [2020-09-04 23:11:21,311 INFO L271 CegarLoopResult]: At program point L54-3(lines 54 72) the Hoare annotation is: true [2020-09-04 23:11:21,311 INFO L271 CegarLoopResult]: At program point L63(line 63) the Hoare annotation is: true [2020-09-04 23:11:21,311 INFO L271 CegarLoopResult]: At program point L55(line 55) the Hoare annotation is: true [2020-09-04 23:11:21,311 INFO L271 CegarLoopResult]: At program point L56-1(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,312 INFO L271 CegarLoopResult]: At program point L56-2(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,312 INFO L271 CegarLoopResult]: At program point L56-4(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,313 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,313 INFO L271 CegarLoopResult]: At program point L56-6(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,313 INFO L271 CegarLoopResult]: At program point L56-7(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,313 INFO L271 CegarLoopResult]: At program point L56-8(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,314 INFO L271 CegarLoopResult]: At program point L56-9(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,314 INFO L264 CegarLoopResult]: At program point L56-11(line 56) the Hoare annotation is: |parse_expression_list_#t~short7| [2020-09-04 23:11:21,314 INFO L271 CegarLoopResult]: At program point L56-12(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,314 INFO L271 CegarLoopResult]: At program point L56-13(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,314 INFO L271 CegarLoopResult]: At program point L56-14(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,314 INFO L271 CegarLoopResult]: At program point L56-15(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,315 INFO L271 CegarLoopResult]: At program point L73(lines 52 73) the Hoare annotation is: true [2020-09-04 23:11:21,315 INFO L271 CegarLoopResult]: At program point L56-16(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,315 INFO L271 CegarLoopResult]: At program point L73-1(line 73) the Hoare annotation is: true [2020-09-04 23:11:21,315 INFO L271 CegarLoopResult]: At program point L56-17(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,315 INFO L271 CegarLoopResult]: At program point L73-2(line 73) the Hoare annotation is: true [2020-09-04 23:11:21,315 INFO L271 CegarLoopResult]: At program point L56-18(line 56) the Hoare annotation is: true [2020-09-04 23:11:21,317 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-04 23:11:21,317 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)) [2020-09-04 23:11:21,317 INFO L271 CegarLoopResult]: At program point L57(line 57) the Hoare annotation is: true [2020-09-04 23:11:21,318 INFO L271 CegarLoopResult]: At program point L57-1(line 57) the Hoare annotation is: true [2020-09-04 23:11:21,318 INFO L271 CegarLoopResult]: At program point L57-2(line 57) the Hoare annotation is: true [2020-09-04 23:11:21,318 INFO L271 CegarLoopResult]: At program point L57-3(line 57) the Hoare annotation is: true [2020-09-04 23:11:21,319 INFO L271 CegarLoopResult]: At program point L57-4(line 57) the Hoare annotation is: true [2020-09-04 23:11:21,319 INFO L271 CegarLoopResult]: At program point L57-6(line 57) the Hoare annotation is: true [2020-09-04 23:11:21,319 INFO L271 CegarLoopResult]: At program point L57-7(line 57) the Hoare annotation is: true [2020-09-04 23:11:21,319 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-04 23:11:21,319 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (and (= |old(#valid)| |#valid|) (= parse_expression_list_~start~0 0)) [2020-09-04 23:11:21,320 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)) [2020-09-04 23:11:21,320 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-04 23:11:21,320 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)) [2020-09-04 23:11:21,321 INFO L271 CegarLoopResult]: At program point parse_expression_listFINAL(lines 47 75) the Hoare annotation is: true [2020-09-04 23:11:21,321 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-04 23:11:21,321 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)) [2020-09-04 23:11:21,321 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)) [2020-09-04 23:11:21,322 INFO L271 CegarLoopResult]: At program point L50-2(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,322 INFO L271 CegarLoopResult]: At program point L50-3(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,323 INFO L271 CegarLoopResult]: At program point L50-4(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,324 INFO L271 CegarLoopResult]: At program point L50-5(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,324 INFO L271 CegarLoopResult]: At program point L50-6(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,324 INFO L271 CegarLoopResult]: At program point L50-7(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,324 INFO L271 CegarLoopResult]: At program point L50-8(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,325 INFO L271 CegarLoopResult]: At program point L50-9(line 50) the Hoare annotation is: true [2020-09-04 23:11:21,325 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)) [2020-09-04 23:11:21,325 INFO L271 CegarLoopResult]: At program point parse_expression_listEXIT(lines 47 75) the Hoare annotation is: true [2020-09-04 23:11:21,325 INFO L271 CegarLoopResult]: At program point L59-1(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,325 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|) [2020-09-04 23:11:21,325 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|) [2020-09-04 23:11:21,326 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|) [2020-09-04 23:11:21,326 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|) [2020-09-04 23:11:21,326 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|) [2020-09-04 23:11:21,326 INFO L271 CegarLoopResult]: At program point L51(line 51) the Hoare annotation is: true [2020-09-04 23:11:21,326 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|) [2020-09-04 23:11:21,327 INFO L271 CegarLoopResult]: At program point L59-10(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,327 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))) [2020-09-04 23:11:21,327 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))) [2020-09-04 23:11:21,327 INFO L271 CegarLoopResult]: At program point L59-13(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,327 INFO L271 CegarLoopResult]: At program point L59-14(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,327 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|) [2020-09-04 23:11:21,328 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|) [2020-09-04 23:11:21,329 INFO L271 CegarLoopResult]: At program point L59-18(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,329 INFO L271 CegarLoopResult]: At program point L59-19(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,329 INFO L271 CegarLoopResult]: At program point L59-20(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,330 INFO L271 CegarLoopResult]: At program point L59-21(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,330 INFO L271 CegarLoopResult]: At program point L59-22(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,330 INFO L271 CegarLoopResult]: At program point L59-23(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,330 INFO L271 CegarLoopResult]: At program point L59-24(line 59) the Hoare annotation is: true [2020-09-04 23:11:21,330 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,330 INFO L271 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,331 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,331 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|)) [2020-09-04 23:11:21,331 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,331 INFO L271 CegarLoopResult]: At program point r_strncpyFINAL(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,331 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,331 INFO L271 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,332 INFO L271 CegarLoopResult]: At program point L31-2(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,332 INFO L271 CegarLoopResult]: At program point r_strncpyEXIT(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,332 INFO L271 CegarLoopResult]: At program point L31-3(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,332 INFO L271 CegarLoopResult]: At program point L31-4(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,332 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-09-04 23:11:21,332 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,333 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,333 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,333 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:11:21,333 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 76 85) the Hoare annotation is: true [2020-09-04 23:11:21,333 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-09-04 23:11:21,333 INFO L271 CegarLoopResult]: At program point L83-1(line 83) the Hoare annotation is: true [2020-09-04 23:11:21,333 INFO L264 CegarLoopResult]: At program point L79-2(lines 79 81) the Hoare annotation is: (<= main_~i~1 7) [2020-09-04 23:11:21,334 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 76 85) the Hoare annotation is: true [2020-09-04 23:11:21,334 INFO L264 CegarLoopResult]: At program point L79-3(line 79) the Hoare annotation is: (<= main_~i~1 7) [2020-09-04 23:11:21,334 INFO L271 CegarLoopResult]: At program point L79-4(line 79) the Hoare annotation is: true [2020-09-04 23:11:21,334 INFO L271 CegarLoopResult]: At program point L79-5(lines 79 81) the Hoare annotation is: true [2020-09-04 23:11:21,334 INFO L271 CegarLoopResult]: At program point L79-6(lines 79 81) the Hoare annotation is: true [2020-09-04 23:11:21,335 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-04 23:11:21,336 INFO L271 CegarLoopResult]: At program point L84(line 84) the Hoare annotation is: true [2020-09-04 23:11:21,337 INFO L271 CegarLoopResult]: At program point L82(line 82) the Hoare annotation is: true [2020-09-04 23:11:21,337 INFO L264 CegarLoopResult]: At program point L80(line 80) the Hoare annotation is: (<= main_~i~1 7) [2020-09-04 23:11:21,337 INFO L264 CegarLoopResult]: At program point L80-1(line 80) the Hoare annotation is: (<= main_~i~1 7) [2020-09-04 23:11:21,337 INFO L271 CegarLoopResult]: At program point L78(line 78) the Hoare annotation is: true [2020-09-04 23:11:21,338 INFO L264 CegarLoopResult]: At program point L80-2(line 80) the Hoare annotation is: (<= main_~i~1 7) [2020-09-04 23:11:21,338 INFO L271 CegarLoopResult]: At program point L78-1(line 78) the Hoare annotation is: true [2020-09-04 23:11:21,338 INFO L271 CegarLoopResult]: At program point L78-2(line 78) the Hoare annotation is: true [2020-09-04 23:11:21,338 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-04 23:11:21,339 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))) [2020-09-04 23:11:21,339 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:11:21,339 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))) [2020-09-04 23:11:21,339 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:11:21,339 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))) [2020-09-04 23:11:21,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:11:21 BoogieIcfgContainer [2020-09-04 23:11:21,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:11:21,377 INFO L168 Benchmark]: Toolchain (without parser) took 13308.95 ms. Allocated memory was 139.5 MB in the beginning and 364.9 MB in the end (delta: 225.4 MB). Free memory was 103.5 MB in the beginning and 96.0 MB in the end (delta: 7.5 MB). Peak memory consumption was 232.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,377 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:11:21,385 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.44 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 180.6 MB in the end (delta: -77.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,386 INFO L168 Benchmark]: Boogie Preprocessor took 56.71 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,389 INFO L168 Benchmark]: RCFGBuilder took 632.01 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 143.0 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,390 INFO L168 Benchmark]: TraceAbstraction took 12122.52 ms. Allocated memory was 203.4 MB in the beginning and 364.9 MB in the end (delta: 161.5 MB). Free memory was 143.0 MB in the beginning and 96.0 MB in the end (delta: 47.1 MB). Peak memory consumption was 208.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:21,396 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 490.44 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 180.6 MB in the end (delta: -77.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.71 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 177.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 632.01 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 143.0 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12122.52 ms. Allocated memory was 203.4 MB in the beginning and 364.9 MB in the end (delta: 161.5 MB). Free memory was 143.0 MB in the beginning and 96.0 MB in the end (delta: 47.1 MB). Peak memory consumption was 208.6 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: 10.8s, OverallIterations: 18, TraceHistogramMax: 8, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2217 SDtfs, 2151 SDslu, 6888 SDs, 0 SdLazy, 4320 SolverSat, 204 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.2s 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, 6889 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 135 FomulaSimplificationsInter, 318 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.0s 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...