/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/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:06:47,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:06:47,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:06:47,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:06:47,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:06:47,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:06:47,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:06:47,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:06:47,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:06:47,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:06:47,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:06:47,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:06:47,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:06:47,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:06:47,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:06:47,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:06:47,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:06:47,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:06:47,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:06:47,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:06:47,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:06:47,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:06:47,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:06:47,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:06:47,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:06:47,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:06:47,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:06:47,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:06:47,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:06:47,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:06:47,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:06:47,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:06:47,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:06:47,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:06:47,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:06:47,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:06:47,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:06:47,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:06:47,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:06:47,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:06:47,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:06:47,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:06:47,348 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:06:47,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:06:47,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:06:47,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:06:47,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:06:47,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:06:47,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:06:47,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:06:47,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:06:47,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:06:47,355 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:06:47,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:06:47,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:06:47,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:06:47,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:06:47,356 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:06:47,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:06:47,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:06:47,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:06:47,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:06:47,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:06:47,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:06:47,358 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 [2020-07-17 18:06:47,671 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:06:47,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:06:47,692 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:06:47,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:06:47,694 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:06:47,695 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-17 18:06:47,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa9a36f5/95c8643f4b8a4ceba031cca1d633c3d2/FLAG7754544f0 [2020-07-17 18:06:48,346 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:06:48,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-17 18:06:48,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa9a36f5/95c8643f4b8a4ceba031cca1d633c3d2/FLAG7754544f0 [2020-07-17 18:06:48,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baa9a36f5/95c8643f4b8a4ceba031cca1d633c3d2 [2020-07-17 18:06:48,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:06:48,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:06:48,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:06:48,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:06:48,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:06:48,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:06:48" (1/1) ... [2020-07-17 18:06:48,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6089cd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:48, skipping insertion in model container [2020-07-17 18:06:48,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:06:48" (1/1) ... [2020-07-17 18:06:48,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:06:48,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:06:48,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:06:49,005 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:06:49,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:06:49,190 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:06:49,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49 WrapperNode [2020-07-17 18:06:49,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:06:49,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:06:49,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:06:49,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:06:49,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... [2020-07-17 18:06:49,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... [2020-07-17 18:06:49,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... [2020-07-17 18:06:49,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... [2020-07-17 18:06:49,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... [2020-07-17 18:06:49,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... [2020-07-17 18:06:49,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... [2020-07-17 18:06:49,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:06:49,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:06:49,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:06:49,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:06:49,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:06:49,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:06:49,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:06:49,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:06:49,344 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-17 18:06:49,344 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-17 18:06:49,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:06:49,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:06:49,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:06:49,345 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-17 18:06:49,345 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-17 18:06:49,346 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-17 18:06:49,346 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-17 18:06:49,346 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-17 18:06:49,346 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-17 18:06:49,346 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-17 18:06:49,347 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-17 18:06:49,347 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-17 18:06:49,347 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-17 18:06:49,347 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-17 18:06:49,348 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-17 18:06:49,348 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-17 18:06:49,348 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-17 18:06:49,349 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-17 18:06:49,349 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-17 18:06:49,349 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-17 18:06:49,349 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-17 18:06:49,349 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-17 18:06:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-17 18:06:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-17 18:06:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-17 18:06:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-17 18:06:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-17 18:06:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-17 18:06:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-17 18:06:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:06:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:06:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:06:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:06:49,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:06:49,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:06:49,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:06:49,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:06:49,935 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 18:06:49,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:06:49 BoogieIcfgContainer [2020-07-17 18:06:49,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:06:49,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:06:49,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:06:49,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:06:49,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:06:48" (1/3) ... [2020-07-17 18:06:49,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e68566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:06:49, skipping insertion in model container [2020-07-17 18:06:49,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:49" (2/3) ... [2020-07-17 18:06:49,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e68566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:06:49, skipping insertion in model container [2020-07-17 18:06:49,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:06:49" (3/3) ... [2020-07-17 18:06:49,955 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-17 18:06:49,965 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:06:49,977 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:06:49,997 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:06:50,026 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:06:50,026 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:06:50,026 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:06:50,027 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:06:50,027 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:06:50,027 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:06:50,027 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:06:50,027 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:06:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-07-17 18:06:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 18:06:50,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:50,070 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] [2020-07-17 18:06:50,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:50,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-07-17 18:06:50,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:50,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122454024] [2020-07-17 18:06:50,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:50,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122454024] [2020-07-17 18:06:50,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:50,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:06:50,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359952016] [2020-07-17 18:06:50,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:06:50,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:06:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:06:50,470 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-07-17 18:06:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:50,927 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2020-07-17 18:06:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:06:50,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-17 18:06:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:50,957 INFO L225 Difference]: With dead ends: 227 [2020-07-17 18:06:50,957 INFO L226 Difference]: Without dead ends: 102 [2020-07-17 18:06:50,971 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 [2020-07-17 18:06:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-17 18:06:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-17 18:06:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-17 18:06:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-07-17 18:06:51,043 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 48 [2020-07-17 18:06:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:51,044 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-07-17 18:06:51,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:06:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-07-17 18:06:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 18:06:51,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:51,048 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] [2020-07-17 18:06:51,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:06:51,050 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1227098254, now seen corresponding path program 1 times [2020-07-17 18:06:51,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:51,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788387030] [2020-07-17 18:06:51,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:51,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788387030] [2020-07-17 18:06:51,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:51,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 18:06:51,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61025849] [2020-07-17 18:06:51,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 18:06:51,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:51,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 18:06:51,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 18:06:51,220 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 4 states. [2020-07-17 18:06:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:51,553 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-07-17 18:06:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 18:06:51,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-17 18:06:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:51,560 INFO L225 Difference]: With dead ends: 189 [2020-07-17 18:06:51,560 INFO L226 Difference]: Without dead ends: 103 [2020-07-17 18:06:51,564 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 [2020-07-17 18:06:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-17 18:06:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-17 18:06:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-17 18:06:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-07-17 18:06:51,598 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 60 [2020-07-17 18:06:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:51,599 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-07-17 18:06:51,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 18:06:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-07-17 18:06:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-17 18:06:51,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:51,602 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] [2020-07-17 18:06:51,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:06:51,602 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:51,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:51,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1578191403, now seen corresponding path program 1 times [2020-07-17 18:06:51,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:51,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732557020] [2020-07-17 18:06:51,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:51,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732557020] [2020-07-17 18:06:51,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:51,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 18:06:51,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702446290] [2020-07-17 18:06:51,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:06:51,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:06:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:06:51,843 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 8 states. [2020-07-17 18:06:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:52,396 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2020-07-17 18:06:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 18:06:52,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-07-17 18:06:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:52,403 INFO L225 Difference]: With dead ends: 365 [2020-07-17 18:06:52,404 INFO L226 Difference]: Without dead ends: 275 [2020-07-17 18:06:52,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:06:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-17 18:06:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 140. [2020-07-17 18:06:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-17 18:06:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2020-07-17 18:06:52,438 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 62 [2020-07-17 18:06:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:52,438 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2020-07-17 18:06:52,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:06:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2020-07-17 18:06:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-17 18:06:52,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:52,442 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] [2020-07-17 18:06:52,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:06:52,442 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-07-17 18:06:52,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:52,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153689063] [2020-07-17 18:06:52,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:52,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153689063] [2020-07-17 18:06:52,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:52,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 18:06:52,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537489511] [2020-07-17 18:06:52,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:06:52,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:06:52,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:06:52,680 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand 10 states. [2020-07-17 18:06:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:53,395 INFO L93 Difference]: Finished difference Result 430 states and 486 transitions. [2020-07-17 18:06:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 18:06:53,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-07-17 18:06:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:53,399 INFO L225 Difference]: With dead ends: 430 [2020-07-17 18:06:53,400 INFO L226 Difference]: Without dead ends: 340 [2020-07-17 18:06:53,402 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 [2020-07-17 18:06:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-07-17 18:06:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 144. [2020-07-17 18:06:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-17 18:06:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-07-17 18:06:53,429 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 65 [2020-07-17 18:06:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:53,430 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-07-17 18:06:53,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:06:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-07-17 18:06:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-17 18:06:53,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:53,432 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] [2020-07-17 18:06:53,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 18:06:53,433 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1492663361, now seen corresponding path program 1 times [2020-07-17 18:06:53,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:53,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301797846] [2020-07-17 18:06:53,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:53,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301797846] [2020-07-17 18:06:53,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:53,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 18:06:53,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234547249] [2020-07-17 18:06:53,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 18:06:53,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 18:06:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 18:06:53,554 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 4 states. [2020-07-17 18:06:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:53,790 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2020-07-17 18:06:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 18:06:53,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-07-17 18:06:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:53,793 INFO L225 Difference]: With dead ends: 233 [2020-07-17 18:06:53,794 INFO L226 Difference]: Without dead ends: 145 [2020-07-17 18:06:53,795 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 [2020-07-17 18:06:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-17 18:06:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-07-17 18:06:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-17 18:06:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-07-17 18:06:53,814 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 65 [2020-07-17 18:06:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:53,815 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-07-17 18:06:53,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 18:06:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-07-17 18:06:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 18:06:53,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:53,817 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] [2020-07-17 18:06:53,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 18:06:53,818 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:53,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1492389340, now seen corresponding path program 1 times [2020-07-17 18:06:53,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:53,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105543169] [2020-07-17 18:06:53,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:54,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105543169] [2020-07-17 18:06:54,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:54,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 18:06:54,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159204539] [2020-07-17 18:06:54,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:06:54,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:06:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:06:54,007 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 10 states. [2020-07-17 18:06:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:54,656 INFO L93 Difference]: Finished difference Result 388 states and 434 transitions. [2020-07-17 18:06:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 18:06:54,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-07-17 18:06:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:54,660 INFO L225 Difference]: With dead ends: 388 [2020-07-17 18:06:54,661 INFO L226 Difference]: Without dead ends: 285 [2020-07-17 18:06:54,662 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 [2020-07-17 18:06:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-17 18:06:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 155. [2020-07-17 18:06:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-17 18:06:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2020-07-17 18:06:54,711 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 67 [2020-07-17 18:06:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:54,711 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2020-07-17 18:06:54,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:06:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2020-07-17 18:06:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-17 18:06:54,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:54,716 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] [2020-07-17 18:06:54,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 18:06:54,719 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash 122758570, now seen corresponding path program 1 times [2020-07-17 18:06:54,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:54,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105732598] [2020-07-17 18:06:54,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:54,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105732598] [2020-07-17 18:06:54,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:54,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-17 18:06:54,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079231750] [2020-07-17 18:06:54,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 18:06:54,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:54,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 18:06:54,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:06:54,925 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand 12 states. [2020-07-17 18:06:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:55,603 INFO L93 Difference]: Finished difference Result 425 states and 477 transitions. [2020-07-17 18:06:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:06:55,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-07-17 18:06:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:55,607 INFO L225 Difference]: With dead ends: 425 [2020-07-17 18:06:55,607 INFO L226 Difference]: Without dead ends: 322 [2020-07-17 18:06:55,610 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 [2020-07-17 18:06:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-07-17 18:06:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 136. [2020-07-17 18:06:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-17 18:06:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2020-07-17 18:06:55,627 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 70 [2020-07-17 18:06:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:55,627 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2020-07-17 18:06:55,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 18:06:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2020-07-17 18:06:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 18:06:55,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:55,629 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:06:55,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 18:06:55,629 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash -272178825, now seen corresponding path program 1 times [2020-07-17 18:06:55,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:55,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214224540] [2020-07-17 18:06:55,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:55,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214224540] [2020-07-17 18:06:55,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:55,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 18:06:55,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685696652] [2020-07-17 18:06:55,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 18:06:55,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 18:06:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 18:06:55,722 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand 4 states. [2020-07-17 18:06:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:55,972 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2020-07-17 18:06:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 18:06:55,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-07-17 18:06:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:55,975 INFO L225 Difference]: With dead ends: 226 [2020-07-17 18:06:55,976 INFO L226 Difference]: Without dead ends: 137 [2020-07-17 18:06:55,977 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 [2020-07-17 18:06:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-17 18:06:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-07-17 18:06:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-17 18:06:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-07-17 18:06:55,992 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 72 [2020-07-17 18:06:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:55,994 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-07-17 18:06:55,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 18:06:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-07-17 18:06:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 18:06:56,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:56,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:06:56,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 18:06:56,005 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash 588909148, now seen corresponding path program 1 times [2020-07-17 18:06:56,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:56,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462992190] [2020-07-17 18:06:56,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:56,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462992190] [2020-07-17 18:06:56,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:06:56,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 18:06:56,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049951546] [2020-07-17 18:06:56,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:06:56,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:06:56,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:06:56,257 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 10 states. [2020-07-17 18:06:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:57,060 INFO L93 Difference]: Finished difference Result 389 states and 436 transitions. [2020-07-17 18:06:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 18:06:57,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-07-17 18:06:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:57,063 INFO L225 Difference]: With dead ends: 389 [2020-07-17 18:06:57,064 INFO L226 Difference]: Without dead ends: 296 [2020-07-17 18:06:57,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:06:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-17 18:06:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-07-17 18:06:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-17 18:06:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2020-07-17 18:06:57,085 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 72 [2020-07-17 18:06:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:57,085 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2020-07-17 18:06:57,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:06:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2020-07-17 18:06:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-17 18:06:57,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:57,087 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-17 18:06:57,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 18:06:57,087 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash 69190993, now seen corresponding path program 1 times [2020-07-17 18:06:57,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:57,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191216090] [2020-07-17 18:06:57,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 18:06:57,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191216090] [2020-07-17 18:06:57,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:57,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 18:06:57,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625600963] [2020-07-17 18:06:57,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:06:57,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:57,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:06:57,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:06:57,186 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand 8 states. [2020-07-17 18:06:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:57,585 INFO L93 Difference]: Finished difference Result 288 states and 323 transitions. [2020-07-17 18:06:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 18:06:57,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-07-17 18:06:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:57,589 INFO L225 Difference]: With dead ends: 288 [2020-07-17 18:06:57,589 INFO L226 Difference]: Without dead ends: 286 [2020-07-17 18:06:57,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:06:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-17 18:06:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 254. [2020-07-17 18:06:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-07-17 18:06:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2020-07-17 18:06:57,615 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 73 [2020-07-17 18:06:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:57,616 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2020-07-17 18:06:57,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:06:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2020-07-17 18:06:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-17 18:06:57,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:57,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:06:57,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 18:06:57,621 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:57,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1474625812, now seen corresponding path program 1 times [2020-07-17 18:06:57,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:57,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144776615] [2020-07-17 18:06:57,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:57,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144776615] [2020-07-17 18:06:57,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:06:57,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 18:06:57,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659644256] [2020-07-17 18:06:57,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 18:06:57,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:57,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 18:06:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:06:57,808 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 12 states. [2020-07-17 18:06:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:58,637 INFO L93 Difference]: Finished difference Result 460 states and 517 transitions. [2020-07-17 18:06:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:06:58,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-07-17 18:06:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:58,643 INFO L225 Difference]: With dead ends: 460 [2020-07-17 18:06:58,644 INFO L226 Difference]: Without dead ends: 367 [2020-07-17 18:06:58,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-07-17 18:06:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-07-17 18:06:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 258. [2020-07-17 18:06:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-17 18:06:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-07-17 18:06:58,667 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 75 [2020-07-17 18:06:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:58,668 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-07-17 18:06:58,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 18:06:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-07-17 18:06:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-17 18:06:58,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:58,669 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-17 18:06:58,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 18:06:58,670 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1908172287, now seen corresponding path program 1 times [2020-07-17 18:06:58,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:58,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107304698] [2020-07-17 18:06:58,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 18:06:58,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107304698] [2020-07-17 18:06:58,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:58,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 18:06:58,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462786048] [2020-07-17 18:06:58,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:06:58,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:58,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:06:58,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:06:58,759 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 8 states. [2020-07-17 18:06:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:59,296 INFO L93 Difference]: Finished difference Result 432 states and 485 transitions. [2020-07-17 18:06:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 18:06:59,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-07-17 18:06:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:59,300 INFO L225 Difference]: With dead ends: 432 [2020-07-17 18:06:59,300 INFO L226 Difference]: Without dead ends: 339 [2020-07-17 18:06:59,302 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 [2020-07-17 18:06:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-07-17 18:06:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 258. [2020-07-17 18:06:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-17 18:06:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-07-17 18:06:59,324 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 76 [2020-07-17 18:06:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:59,325 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-07-17 18:06:59,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:06:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-07-17 18:06:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-17 18:06:59,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:59,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:06:59,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 18:06:59,328 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:59,328 INFO L82 PathProgramCache]: Analyzing trace with hash 116425250, now seen corresponding path program 1 times [2020-07-17 18:06:59,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:59,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954743154] [2020-07-17 18:06:59,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:06:59,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954743154] [2020-07-17 18:06:59,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:59,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:06:59,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60778195] [2020-07-17 18:06:59,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:06:59,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:06:59,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:06:59,403 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 5 states. [2020-07-17 18:06:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:59,645 INFO L93 Difference]: Finished difference Result 366 states and 409 transitions. [2020-07-17 18:06:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:06:59,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-07-17 18:06:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:59,649 INFO L225 Difference]: With dead ends: 366 [2020-07-17 18:06:59,650 INFO L226 Difference]: Without dead ends: 277 [2020-07-17 18:06:59,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:06:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-07-17 18:06:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 260. [2020-07-17 18:06:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-17 18:06:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2020-07-17 18:06:59,685 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 76 [2020-07-17 18:06:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:59,686 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2020-07-17 18:06:59,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:06:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2020-07-17 18:06:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-17 18:06:59,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:59,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:06:59,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 18:06:59,690 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1122457453, now seen corresponding path program 1 times [2020-07-17 18:06:59,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:59,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624356559] [2020-07-17 18:06:59,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:06:59,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624356559] [2020-07-17 18:06:59,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:59,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 18:06:59,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279657237] [2020-07-17 18:06:59,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 18:06:59,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 18:06:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:06:59,843 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand 6 states. [2020-07-17 18:07:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:00,151 INFO L93 Difference]: Finished difference Result 411 states and 459 transitions. [2020-07-17 18:07:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 18:07:00,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-07-17 18:07:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:00,156 INFO L225 Difference]: With dead ends: 411 [2020-07-17 18:07:00,156 INFO L226 Difference]: Without dead ends: 297 [2020-07-17 18:07:00,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:07:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-07-17 18:07:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 253. [2020-07-17 18:07:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-07-17 18:07:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 281 transitions. [2020-07-17 18:07:00,188 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 281 transitions. Word has length 77 [2020-07-17 18:07:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:00,189 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 281 transitions. [2020-07-17 18:07:00,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 18:07:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 281 transitions. [2020-07-17 18:07:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-17 18:07:00,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:00,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:00,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 18:07:00,191 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2031617893, now seen corresponding path program 1 times [2020-07-17 18:07:00,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:00,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685705836] [2020-07-17 18:07:00,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:07:00,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685705836] [2020-07-17 18:07:00,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:00,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 18:07:00,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405778169] [2020-07-17 18:07:00,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:07:00,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:07:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:07:00,286 INFO L87 Difference]: Start difference. First operand 253 states and 281 transitions. Second operand 8 states. [2020-07-17 18:07:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:00,678 INFO L93 Difference]: Finished difference Result 521 states and 577 transitions. [2020-07-17 18:07:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:07:00,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-07-17 18:07:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:00,682 INFO L225 Difference]: With dead ends: 521 [2020-07-17 18:07:00,682 INFO L226 Difference]: Without dead ends: 331 [2020-07-17 18:07:00,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:07:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-07-17 18:07:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 264. [2020-07-17 18:07:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-17 18:07:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-07-17 18:07:00,710 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 292 transitions. Word has length 78 [2020-07-17 18:07:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:00,711 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-07-17 18:07:00,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:07:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 292 transitions. [2020-07-17 18:07:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 18:07:00,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:00,713 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-07-17 18:07:00,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 18:07:00,713 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:00,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1446971750, now seen corresponding path program 1 times [2020-07-17 18:07:00,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:00,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659102936] [2020-07-17 18:07:00,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:07:00,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659102936] [2020-07-17 18:07:00,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:07:00,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 18:07:00,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923825256] [2020-07-17 18:07:00,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:07:00,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:07:00,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:07:00,812 INFO L87 Difference]: Start difference. First operand 264 states and 292 transitions. Second operand 10 states. [2020-07-17 18:07:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:01,566 INFO L93 Difference]: Finished difference Result 599 states and 665 transitions. [2020-07-17 18:07:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 18:07:01,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-07-17 18:07:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:01,577 INFO L225 Difference]: With dead ends: 599 [2020-07-17 18:07:01,578 INFO L226 Difference]: Without dead ends: 435 [2020-07-17 18:07:01,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-07-17 18:07:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-07-17 18:07:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 355. [2020-07-17 18:07:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-07-17 18:07:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 393 transitions. [2020-07-17 18:07:01,626 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 393 transitions. Word has length 79 [2020-07-17 18:07:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:01,627 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 393 transitions. [2020-07-17 18:07:01,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:07:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 393 transitions. [2020-07-17 18:07:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-17 18:07:01,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:01,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2020-07-17 18:07:01,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 18:07:01,632 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:01,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1140392269, now seen corresponding path program 2 times [2020-07-17 18:07:01,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:01,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418219738] [2020-07-17 18:07:01,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:07:01,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418219738] [2020-07-17 18:07:01,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:07:01,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 18:07:01,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146266232] [2020-07-17 18:07:01,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 18:07:01,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:01,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 18:07:01,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:07:01,877 INFO L87 Difference]: Start difference. First operand 355 states and 393 transitions. Second operand 12 states. [2020-07-17 18:07:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:02,715 INFO L93 Difference]: Finished difference Result 694 states and 770 transitions. [2020-07-17 18:07:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:07:02,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-07-17 18:07:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:02,720 INFO L225 Difference]: With dead ends: 694 [2020-07-17 18:07:02,720 INFO L226 Difference]: Without dead ends: 525 [2020-07-17 18:07:02,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-07-17 18:07:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-07-17 18:07:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 390. [2020-07-17 18:07:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-17 18:07:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 432 transitions. [2020-07-17 18:07:02,802 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 432 transitions. Word has length 82 [2020-07-17 18:07:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:02,803 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 432 transitions. [2020-07-17 18:07:02,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 18:07:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 432 transitions. [2020-07-17 18:07:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-17 18:07:02,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:02,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2020-07-17 18:07:02,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 18:07:02,805 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1836590973, now seen corresponding path program 2 times [2020-07-17 18:07:02,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:02,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379113716] [2020-07-17 18:07:02,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:07:02,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379113716] [2020-07-17 18:07:02,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:07:02,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 18:07:02,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604584170] [2020-07-17 18:07:02,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 18:07:02,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 18:07:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:07:02,978 INFO L87 Difference]: Start difference. First operand 390 states and 432 transitions. Second operand 14 states. [2020-07-17 18:07:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:03,944 INFO L93 Difference]: Finished difference Result 680 states and 754 transitions. [2020-07-17 18:07:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 18:07:03,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-07-17 18:07:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:03,949 INFO L225 Difference]: With dead ends: 680 [2020-07-17 18:07:03,949 INFO L226 Difference]: Without dead ends: 428 [2020-07-17 18:07:03,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:07:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-07-17 18:07:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 247. [2020-07-17 18:07:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-17 18:07:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 270 transitions. [2020-07-17 18:07:03,976 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 270 transitions. Word has length 85 [2020-07-17 18:07:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:03,977 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 270 transitions. [2020-07-17 18:07:03,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 18:07:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 270 transitions. [2020-07-17 18:07:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-17 18:07:03,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:03,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-07-17 18:07:03,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 18:07:03,979 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:03,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1723821108, now seen corresponding path program 2 times [2020-07-17 18:07:03,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:03,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676419483] [2020-07-17 18:07:03,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-17 18:07:04,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676419483] [2020-07-17 18:07:04,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:04,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 18:07:04,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387833883] [2020-07-17 18:07:04,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 18:07:04,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:04,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 18:07:04,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:07:04,048 INFO L87 Difference]: Start difference. First operand 247 states and 270 transitions. Second operand 6 states. [2020-07-17 18:07:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:04,357 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2020-07-17 18:07:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:07:04,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-07-17 18:07:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:04,360 INFO L225 Difference]: With dead ends: 387 [2020-07-17 18:07:04,360 INFO L226 Difference]: Without dead ends: 290 [2020-07-17 18:07:04,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:07:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-17 18:07:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 247. [2020-07-17 18:07:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-17 18:07:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 269 transitions. [2020-07-17 18:07:04,389 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 269 transitions. Word has length 90 [2020-07-17 18:07:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:04,390 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 269 transitions. [2020-07-17 18:07:04,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 18:07:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 269 transitions. [2020-07-17 18:07:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-17 18:07:04,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:04,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1] [2020-07-17 18:07:04,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 18:07:04,392 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 888855281, now seen corresponding path program 1 times [2020-07-17 18:07:04,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:04,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777700494] [2020-07-17 18:07:04,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:07:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:07:04,496 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:07:04,497 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:07:04,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 18:07:04,544 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,551 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,555 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,556 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,559 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,560 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,560 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,561 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,564 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,565 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,566 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,568 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,569 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,570 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,570 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,571 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,574 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,575 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,576 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,576 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,577 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,579 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,580 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,581 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-17 18:07:04,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:07:04 BoogieIcfgContainer [2020-07-17 18:07:04,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:07:04,617 INFO L168 Benchmark]: Toolchain (without parser) took 15952.73 ms. Allocated memory was 141.6 MB in the beginning and 361.2 MB in the end (delta: 219.7 MB). Free memory was 103.8 MB in the beginning and 294.9 MB in the end (delta: -191.1 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:04,623 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 122.2 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-17 18:07:04,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 525.28 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 181.9 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:04,626 INFO L168 Benchmark]: Boogie Preprocessor took 58.62 ms. Allocated memory is still 205.5 MB. Free memory was 181.9 MB in the beginning and 179.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:04,627 INFO L168 Benchmark]: RCFGBuilder took 692.01 ms. Allocated memory is still 205.5 MB. Free memory was 179.9 MB in the beginning and 146.8 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:04,629 INFO L168 Benchmark]: TraceAbstraction took 14668.15 ms. Allocated memory was 205.5 MB in the beginning and 361.2 MB in the end (delta: 155.7 MB). Free memory was 146.8 MB in the beginning and 294.9 MB in the end (delta: -148.1 MB). Peak memory consumption was 7.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:04,635 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 122.2 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 525.28 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 181.9 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.62 ms. Allocated memory is still 205.5 MB. Free memory was 181.9 MB in the beginning and 179.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 692.01 ms. Allocated memory is still 205.5 MB. Free memory was 179.9 MB in the beginning and 146.8 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14668.15 ms. Allocated memory was 205.5 MB in the beginning and 361.2 MB in the end (delta: 155.7 MB). Free memory was 146.8 MB in the beginning and 294.9 MB in the end (delta: -148.1 MB). Peak memory consumption was 7.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; VAL [A={4:0}] [L75] A[2 + 2 + 4] = 0 VAL [A={4:0}] [L76] CALL parse_expression_list (A) VAL [str={4:0}] [L48] int start=0, i=-1, j=-1; VAL [i=-1, j=-1, start=0, str={4:0}, str={4:0}] [L49] char str2[2]; VAL [i=-1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}] [L50] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}] [L52] i++ VAL [i=0, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}] [L53] str[i] VAL [i=0, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=40] [L54] case 0: VAL [i=0, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=40] [L69] EXPR str[i] VAL [i=0, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=40] [L69] COND TRUE str[i] != 0 VAL [i=0, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=40] [L52] i++ VAL [i=1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}] [L53] str[i] VAL [i=1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=36] [L54] case 0: VAL [i=1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=36] [L69] EXPR str[i] VAL [i=1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=36] [L69] COND TRUE str[i] != 0 VAL [i=1, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=36] [L52] i++ VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}] [L53] str[i] VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L54] case 0: VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L55] EXPR str[start] VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=40] [L55] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=40] [L55] EXPR str[start] VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=40, str[start]=40] [L55] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=40, str[start]=40] [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=40, str[start]=40] [L56] EXPR str[start] VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=40] [L56] COND FALSE !(str[start] == '"') VAL [i=2, j=-1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[start]=40] [L57] j = i-1 VAL [i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L58] EXPR str[j] VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36] [L58] EXPR str[j] VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36, str[j]=36] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36, str[j]=36] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36, str[j]=36] [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36, str[j]=36] [L59] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=1, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L59] EXPR str[j] VAL [(0 < j) && (str[j] == '"')=1, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36] [L59] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36] [L59] COND FALSE !((0 < j) && (str[j] == '"')) VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0, str[j]=36] [L60] COND TRUE start<=j VAL [i=2, j=1, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L61] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={3:0}, src={4:0}] [L30] return strncpy(dest,src,n); VAL [\old(n)=2, \result={37:38}, dest={3:0}, dest={3:0}, n=2, src={4:0}, src={4:0}, strncpy(dest,src,n)={37:38}] [L61] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={37:38}, start=0, str={4:0}, str={4:0}, str2={3:0}, str[i]=0] [L62] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.4s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 10.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2558 SDtfs, 3663 SDslu, 8910 SDs, 0 SdLazy, 5966 SolverSat, 285 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 322 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred 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: 0.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 1532 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1464 NumberOfCodeBlocks, 1464 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1353 ConstructedInterpolants, 0 QuantifiedInterpolants, 257869 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 14 PerfectInterpolantSequences, 60/100 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 incorrect! Received shutdown request...