/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:46:57,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:46:57,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:46:57,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:46:57,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:46:57,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:46:57,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:46:57,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:46:57,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:46:57,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:46:57,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:46:57,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:46:57,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:46:57,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:46:57,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:46:57,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:46:57,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:46:57,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:46:57,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:46:57,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:46:57,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:46:57,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:46:57,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:46:57,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:46:57,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:46:57,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 21:46:57,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 21:46:57,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 21:46:57,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 21:46:57,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 21:46:57,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 21:46:57,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 21:46:57,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 21:46:57,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:46:57,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:46:57,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:46:57,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:46:57,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:46:57,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:46:57,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:46:57,252 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:46:57,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:46:57,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:46:57,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:46:57,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:46:57,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:46:57,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:46:57,253 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:46:57,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:46:57,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:46:57,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:46:57,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:46:57,255 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:46:57,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:46:57,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:46:57,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:46:57,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:46:57,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:46:57,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:46:57,257 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:46:57,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:46:57,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:46:57,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:46:57,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:46:57,680 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:46:57,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-23 21:46:57,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3485cf9/ce5b7993ef1848c1b7e1b65b81b8263f/FLAGef6b38b46 [2020-10-23 21:46:58,462 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:46:58,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-23 21:46:58,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3485cf9/ce5b7993ef1848c1b7e1b65b81b8263f/FLAGef6b38b46 [2020-10-23 21:46:58,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3485cf9/ce5b7993ef1848c1b7e1b65b81b8263f [2020-10-23 21:46:58,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:46:58,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:46:58,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:58,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:46:58,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:46:58,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:58" (1/1) ... [2020-10-23 21:46:58,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b7f039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:58, skipping insertion in model container [2020-10-23 21:46:58,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:58" (1/1) ... [2020-10-23 21:46:58,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:46:58,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:46:59,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:59,173 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:46:59,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:59,244 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:46:59,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59 WrapperNode [2020-10-23 21:46:59,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:59,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:46:59,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:46:59,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:46:59,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (1/1) ... [2020-10-23 21:46:59,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (1/1) ... [2020-10-23 21:46:59,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (1/1) ... [2020-10-23 21:46:59,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (1/1) ... [2020-10-23 21:46:59,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (1/1) ... [2020-10-23 21:46:59,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (1/1) ... [2020-10-23 21:46:59,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (1/1) ... [2020-10-23 21:46:59,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:46:59,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:46:59,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:46:59,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:46:59,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (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 [2020-10-23 21:46:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:46:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:46:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:46:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:46:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-10-23 21:46:59,412 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-10-23 21:46:59,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:46:59,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:46:59,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:46:59,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:46:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:46:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:46:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:46:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:46:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-10-23 21:46:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-10-23 21:46:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-10-23 21:46:59,414 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-10-23 21:46:59,414 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-10-23 21:46:59,414 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-10-23 21:46:59,414 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-10-23 21:46:59,414 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-10-23 21:46:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-10-23 21:46:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-10-23 21:46:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-10-23 21:46:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-10-23 21:46:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-10-23 21:46:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-10-23 21:46:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-10-23 21:46:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-10-23 21:46:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-10-23 21:46:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-10-23 21:46:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-10-23 21:46:59,416 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-10-23 21:46:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-10-23 21:46:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-10-23 21:46:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-10-23 21:46:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-10-23 21:46:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-10-23 21:46:59,417 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-10-23 21:46:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:46:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:46:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:46:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:46:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:46:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:46:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:46:59,892 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:46:59,893 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 21:46:59,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:59 BoogieIcfgContainer [2020-10-23 21:46:59,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:46:59,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:46:59,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:46:59,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:46:59,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:46:58" (1/3) ... [2020-10-23 21:46:59,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9c371a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:59, skipping insertion in model container [2020-10-23 21:46:59,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:59" (2/3) ... [2020-10-23 21:46:59,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9c371a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:59, skipping insertion in model container [2020-10-23 21:46:59,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:59" (3/3) ... [2020-10-23 21:46:59,908 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-23 21:46:59,937 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:46:59,943 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:46:59,958 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:46:59,996 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:46:59,996 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:46:59,996 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:46:59,997 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:46:59,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:46:59,999 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:46:59,999 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:46:59,999 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:47:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states. [2020-10-23 21:47:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 21:47:00,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:00,052 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] [2020-10-23 21:47:00,052 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1346984002, now seen corresponding path program 1 times [2020-10-23 21:47:00,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:00,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445821364] [2020-10-23 21:47:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:00,173 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:00,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:00,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 21:47:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:00,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445821364] [2020-10-23 21:47:00,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:00,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:47:00,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844697246] [2020-10-23 21:47:00,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:47:00,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:00,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:47:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:00,470 INFO L87 Difference]: Start difference. First operand 133 states. Second operand 3 states. [2020-10-23 21:47:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:00,781 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2020-10-23 21:47:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:47:00,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-10-23 21:47:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:00,792 INFO L225 Difference]: With dead ends: 239 [2020-10-23 21:47:00,792 INFO L226 Difference]: Without dead ends: 108 [2020-10-23 21:47:00,797 INFO L677 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 [2020-10-23 21:47:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-23 21:47:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-23 21:47:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 21:47:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2020-10-23 21:47:00,853 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 54 [2020-10-23 21:47:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:00,854 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2020-10-23 21:47:00,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:47:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2020-10-23 21:47:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-23 21:47:00,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:00,857 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] [2020-10-23 21:47:00,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:47:00,858 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash 746606165, now seen corresponding path program 1 times [2020-10-23 21:47:00,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:00,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22229287] [2020-10-23 21:47:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:00,862 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:00,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:00,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 21:47:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:00,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22229287] [2020-10-23 21:47:00,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:00,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:47:00,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485842284] [2020-10-23 21:47:00,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:47:00,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:00,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:47:00,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:47:00,969 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 4 states. [2020-10-23 21:47:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:01,184 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2020-10-23 21:47:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:47:01,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-23 21:47:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:01,187 INFO L225 Difference]: With dead ends: 197 [2020-10-23 21:47:01,187 INFO L226 Difference]: Without dead ends: 109 [2020-10-23 21:47:01,189 INFO L677 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 [2020-10-23 21:47:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-23 21:47:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-23 21:47:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-23 21:47:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2020-10-23 21:47:01,207 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 66 [2020-10-23 21:47:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:01,208 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2020-10-23 21:47:01,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:47:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2020-10-23 21:47:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 21:47:01,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:01,213 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] [2020-10-23 21:47:01,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:47:01,214 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1799427698, now seen corresponding path program 1 times [2020-10-23 21:47:01,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:01,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68627196] [2020-10-23 21:47:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:01,218 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:01,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-23 21:47:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:01,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68627196] [2020-10-23 21:47:01,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:01,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:47:01,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508291358] [2020-10-23 21:47:01,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:47:01,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:47:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:01,480 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand 8 states. [2020-10-23 21:47:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:01,994 INFO L93 Difference]: Finished difference Result 216 states and 240 transitions. [2020-10-23 21:47:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 21:47:01,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-23 21:47:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:01,998 INFO L225 Difference]: With dead ends: 216 [2020-10-23 21:47:01,999 INFO L226 Difference]: Without dead ends: 212 [2020-10-23 21:47:01,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-23 21:47:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-23 21:47:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2020-10-23 21:47:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-23 21:47:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2020-10-23 21:47:02,044 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 68 [2020-10-23 21:47:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:02,046 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2020-10-23 21:47:02,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:47:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2020-10-23 21:47:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-23 21:47:02,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:02,054 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, 1] [2020-10-23 21:47:02,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:47:02,056 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1878630598, now seen corresponding path program 1 times [2020-10-23 21:47:02,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:02,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030598783] [2020-10-23 21:47:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:02,060 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:02,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:02,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 21:47:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:02,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030598783] [2020-10-23 21:47:02,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:02,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:47:02,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61511910] [2020-10-23 21:47:02,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:47:02,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:02,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:47:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:02,286 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand 12 states. [2020-10-23 21:47:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:03,417 INFO L93 Difference]: Finished difference Result 456 states and 517 transitions. [2020-10-23 21:47:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 21:47:03,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-23 21:47:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:03,423 INFO L225 Difference]: With dead ends: 456 [2020-10-23 21:47:03,423 INFO L226 Difference]: Without dead ends: 364 [2020-10-23 21:47:03,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-23 21:47:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-23 21:47:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 209. [2020-10-23 21:47:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-23 21:47:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 237 transitions. [2020-10-23 21:47:03,462 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 237 transitions. Word has length 71 [2020-10-23 21:47:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:03,462 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 237 transitions. [2020-10-23 21:47:03,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:47:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 237 transitions. [2020-10-23 21:47:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-23 21:47:03,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:03,465 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, 1] [2020-10-23 21:47:03,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:47:03,465 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1354483306, now seen corresponding path program 1 times [2020-10-23 21:47:03,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:03,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238479522] [2020-10-23 21:47:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:03,469 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:03,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:03,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 21:47:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:03,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238479522] [2020-10-23 21:47:03,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:03,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:47:03,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843185365] [2020-10-23 21:47:03,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:47:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:03,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:47:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:47:03,548 INFO L87 Difference]: Start difference. First operand 209 states and 237 transitions. Second operand 4 states. [2020-10-23 21:47:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:03,791 INFO L93 Difference]: Finished difference Result 301 states and 340 transitions. [2020-10-23 21:47:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:47:03,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-23 21:47:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:03,794 INFO L225 Difference]: With dead ends: 301 [2020-10-23 21:47:03,794 INFO L226 Difference]: Without dead ends: 211 [2020-10-23 21:47:03,796 INFO L677 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 [2020-10-23 21:47:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-23 21:47:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-10-23 21:47:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-23 21:47:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 238 transitions. [2020-10-23 21:47:03,818 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 238 transitions. Word has length 71 [2020-10-23 21:47:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:03,818 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 238 transitions. [2020-10-23 21:47:03,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:47:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 238 transitions. [2020-10-23 21:47:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-23 21:47:03,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:03,821 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, 1, 1] [2020-10-23 21:47:03,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:47:03,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:03,822 INFO L82 PathProgramCache]: Analyzing trace with hash -644302664, now seen corresponding path program 1 times [2020-10-23 21:47:03,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:03,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712516708] [2020-10-23 21:47:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:03,825 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-23 21:47:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:03,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712516708] [2020-10-23 21:47:03,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:03,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:47:03,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474835325] [2020-10-23 21:47:03,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:47:03,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:47:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:47:03,936 INFO L87 Difference]: Start difference. First operand 211 states and 238 transitions. Second operand 5 states. [2020-10-23 21:47:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:04,219 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2020-10-23 21:47:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:47:04,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-23 21:47:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:04,221 INFO L225 Difference]: With dead ends: 324 [2020-10-23 21:47:04,221 INFO L226 Difference]: Without dead ends: 225 [2020-10-23 21:47:04,226 INFO L677 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 [2020-10-23 21:47:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-23 21:47:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 215. [2020-10-23 21:47:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-23 21:47:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 242 transitions. [2020-10-23 21:47:04,257 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 242 transitions. Word has length 72 [2020-10-23 21:47:04,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:04,258 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 242 transitions. [2020-10-23 21:47:04,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:47:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 242 transitions. [2020-10-23 21:47:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 21:47:04,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:04,261 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, 1, 1, 1] [2020-10-23 21:47:04,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 21:47:04,261 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1665835257, now seen corresponding path program 1 times [2020-10-23 21:47:04,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:04,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349171457] [2020-10-23 21:47:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:04,267 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:04,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:04,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-23 21:47:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:04,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349171457] [2020-10-23 21:47:04,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:04,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:47:04,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919199717] [2020-10-23 21:47:04,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:47:04,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:04,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:47:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:47:04,409 INFO L87 Difference]: Start difference. First operand 215 states and 242 transitions. Second operand 6 states. [2020-10-23 21:47:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:04,744 INFO L93 Difference]: Finished difference Result 390 states and 436 transitions. [2020-10-23 21:47:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 21:47:04,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-23 21:47:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:04,747 INFO L225 Difference]: With dead ends: 390 [2020-10-23 21:47:04,747 INFO L226 Difference]: Without dead ends: 276 [2020-10-23 21:47:04,748 INFO L677 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 [2020-10-23 21:47:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-23 21:47:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2020-10-23 21:47:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-23 21:47:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 245 transitions. [2020-10-23 21:47:04,769 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 245 transitions. Word has length 73 [2020-10-23 21:47:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:04,769 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 245 transitions. [2020-10-23 21:47:04,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:47:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 245 transitions. [2020-10-23 21:47:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-23 21:47:04,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:04,771 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, 1, 1, 1, 1] [2020-10-23 21:47:04,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 21:47:04,771 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:04,772 INFO L82 PathProgramCache]: Analyzing trace with hash -14206149, now seen corresponding path program 1 times [2020-10-23 21:47:04,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:04,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534388925] [2020-10-23 21:47:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:04,775 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:04,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:04,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-23 21:47:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:04,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534388925] [2020-10-23 21:47:04,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:04,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:47:04,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116111875] [2020-10-23 21:47:04,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:47:04,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:47:04,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:47:04,854 INFO L87 Difference]: Start difference. First operand 219 states and 245 transitions. Second operand 6 states. [2020-10-23 21:47:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:05,222 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2020-10-23 21:47:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:47:05,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-23 21:47:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:05,228 INFO L225 Difference]: With dead ends: 362 [2020-10-23 21:47:05,229 INFO L226 Difference]: Without dead ends: 263 [2020-10-23 21:47:05,231 INFO L677 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 [2020-10-23 21:47:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-23 21:47:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 219. [2020-10-23 21:47:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-23 21:47:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 244 transitions. [2020-10-23 21:47:05,277 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 244 transitions. Word has length 74 [2020-10-23 21:47:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:05,278 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 244 transitions. [2020-10-23 21:47:05,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:47:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 244 transitions. [2020-10-23 21:47:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-23 21:47:05,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:05,280 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, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:05,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 21:47:05,280 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1638680456, now seen corresponding path program 1 times [2020-10-23 21:47:05,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:05,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102443133] [2020-10-23 21:47:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:05,290 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 21:47:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102443133] [2020-10-23 21:47:05,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:05,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:47:05,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325696380] [2020-10-23 21:47:05,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:47:05,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:05,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:47:05,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:47:05,456 INFO L87 Difference]: Start difference. First operand 219 states and 244 transitions. Second operand 8 states. [2020-10-23 21:47:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:05,935 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2020-10-23 21:47:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 21:47:05,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-10-23 21:47:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:05,938 INFO L225 Difference]: With dead ends: 464 [2020-10-23 21:47:05,938 INFO L226 Difference]: Without dead ends: 305 [2020-10-23 21:47:05,939 INFO L677 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 [2020-10-23 21:47:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-23 21:47:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 226. [2020-10-23 21:47:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-23 21:47:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 248 transitions. [2020-10-23 21:47:05,970 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 248 transitions. Word has length 76 [2020-10-23 21:47:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:05,971 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 248 transitions. [2020-10-23 21:47:05,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:47:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 248 transitions. [2020-10-23 21:47:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-23 21:47:05,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:05,972 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] [2020-10-23 21:47:05,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 21:47:05,973 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:05,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1528930525, now seen corresponding path program 1 times [2020-10-23 21:47:05,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:05,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000362682] [2020-10-23 21:47:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:06,282 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:06,286 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:06,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:06,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 21:47:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:06,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000362682] [2020-10-23 21:47:06,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:06,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:47:06,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825572170] [2020-10-23 21:47:06,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:47:06,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:06,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:47:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:47:06,494 INFO L87 Difference]: Start difference. First operand 226 states and 248 transitions. Second operand 10 states. [2020-10-23 21:47:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:07,270 INFO L93 Difference]: Finished difference Result 461 states and 506 transitions. [2020-10-23 21:47:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 21:47:07,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-23 21:47:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:07,274 INFO L225 Difference]: With dead ends: 461 [2020-10-23 21:47:07,274 INFO L226 Difference]: Without dead ends: 347 [2020-10-23 21:47:07,275 INFO L677 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 [2020-10-23 21:47:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-23 21:47:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 282. [2020-10-23 21:47:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-23 21:47:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 311 transitions. [2020-10-23 21:47:07,312 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 311 transitions. Word has length 78 [2020-10-23 21:47:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:07,313 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 311 transitions. [2020-10-23 21:47:07,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:47:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 311 transitions. [2020-10-23 21:47:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 21:47:07,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:07,314 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, 1, 1, 1] [2020-10-23 21:47:07,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 21:47:07,315 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:07,316 INFO L82 PathProgramCache]: Analyzing trace with hash 911510761, now seen corresponding path program 1 times [2020-10-23 21:47:07,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:07,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428149940] [2020-10-23 21:47:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:07,555 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:07,557 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:07,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:07,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 21:47:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:07,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428149940] [2020-10-23 21:47:07,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:07,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 21:47:07,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714632649] [2020-10-23 21:47:07,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 21:47:07,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 21:47:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:47:07,807 INFO L87 Difference]: Start difference. First operand 282 states and 311 transitions. Second operand 14 states. [2020-10-23 21:47:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:08,554 INFO L93 Difference]: Finished difference Result 460 states and 502 transitions. [2020-10-23 21:47:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 21:47:08,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-23 21:47:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:08,560 INFO L225 Difference]: With dead ends: 460 [2020-10-23 21:47:08,560 INFO L226 Difference]: Without dead ends: 338 [2020-10-23 21:47:08,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-23 21:47:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-23 21:47:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 276. [2020-10-23 21:47:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-23 21:47:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 304 transitions. [2020-10-23 21:47:08,595 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 304 transitions. Word has length 81 [2020-10-23 21:47:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:08,596 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 304 transitions. [2020-10-23 21:47:08,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 21:47:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 304 transitions. [2020-10-23 21:47:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-23 21:47:08,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:08,598 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, 1, 1, 1] [2020-10-23 21:47:08,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 21:47:08,598 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:08,599 INFO L82 PathProgramCache]: Analyzing trace with hash -462249594, now seen corresponding path program 1 times [2020-10-23 21:47:08,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:08,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892838666] [2020-10-23 21:47:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:08,890 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:08,892 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:09,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-23 21:47:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:09,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892838666] [2020-10-23 21:47:09,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:09,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:47:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263465803] [2020-10-23 21:47:09,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:47:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:47:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:47:09,083 INFO L87 Difference]: Start difference. First operand 276 states and 304 transitions. Second operand 10 states. [2020-10-23 21:47:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:09,728 INFO L93 Difference]: Finished difference Result 453 states and 498 transitions. [2020-10-23 21:47:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 21:47:09,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-10-23 21:47:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:09,731 INFO L225 Difference]: With dead ends: 453 [2020-10-23 21:47:09,732 INFO L226 Difference]: Without dead ends: 343 [2020-10-23 21:47:09,733 INFO L677 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 [2020-10-23 21:47:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-10-23 21:47:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 280. [2020-10-23 21:47:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-23 21:47:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 308 transitions. [2020-10-23 21:47:09,762 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 308 transitions. Word has length 82 [2020-10-23 21:47:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:09,762 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 308 transitions. [2020-10-23 21:47:09,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:47:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 308 transitions. [2020-10-23 21:47:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 21:47:09,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:09,764 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:09,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 21:47:09,764 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1324418476, now seen corresponding path program 1 times [2020-10-23 21:47:09,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:09,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493441003] [2020-10-23 21:47:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:10,098 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:10,102 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:10,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:10,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-23 21:47:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:10,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493441003] [2020-10-23 21:47:10,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:10,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:47:10,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749525454] [2020-10-23 21:47:10,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:47:10,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:10,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:47:10,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:47:10,248 INFO L87 Difference]: Start difference. First operand 280 states and 308 transitions. Second operand 10 states. [2020-10-23 21:47:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:10,916 INFO L93 Difference]: Finished difference Result 631 states and 698 transitions. [2020-10-23 21:47:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 21:47:10,917 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-10-23 21:47:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:10,921 INFO L225 Difference]: With dead ends: 631 [2020-10-23 21:47:10,922 INFO L226 Difference]: Without dead ends: 470 [2020-10-23 21:47:10,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-23 21:47:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-23 21:47:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 391. [2020-10-23 21:47:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-10-23 21:47:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 432 transitions. [2020-10-23 21:47:10,993 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 432 transitions. Word has length 87 [2020-10-23 21:47:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:10,994 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 432 transitions. [2020-10-23 21:47:10,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:47:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 432 transitions. [2020-10-23 21:47:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-23 21:47:10,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:10,996 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, 1, 1, 1] [2020-10-23 21:47:10,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 21:47:10,997 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2103361900, now seen corresponding path program 2 times [2020-10-23 21:47:10,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:11,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388197766] [2020-10-23 21:47:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:11,516 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:11,517 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:11,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-23 21:47:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:11,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388197766] [2020-10-23 21:47:11,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:11,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:47:11,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487420368] [2020-10-23 21:47:11,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:47:11,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:47:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:11,692 INFO L87 Difference]: Start difference. First operand 391 states and 432 transitions. Second operand 12 states. [2020-10-23 21:47:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:12,550 INFO L93 Difference]: Finished difference Result 734 states and 809 transitions. [2020-10-23 21:47:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 21:47:12,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-10-23 21:47:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:12,554 INFO L225 Difference]: With dead ends: 734 [2020-10-23 21:47:12,554 INFO L226 Difference]: Without dead ends: 563 [2020-10-23 21:47:12,556 INFO L677 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 [2020-10-23 21:47:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-10-23 21:47:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 390. [2020-10-23 21:47:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-23 21:47:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 430 transitions. [2020-10-23 21:47:12,597 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 430 transitions. Word has length 88 [2020-10-23 21:47:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:12,598 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 430 transitions. [2020-10-23 21:47:12,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:47:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 430 transitions. [2020-10-23 21:47:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-23 21:47:12,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:12,600 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, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:12,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 21:47:12,600 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash -823874600, now seen corresponding path program 2 times [2020-10-23 21:47:12,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:12,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996046311] [2020-10-23 21:47:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:13,111 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:13,113 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-23 21:47:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:13,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996046311] [2020-10-23 21:47:13,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:13,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 21:47:13,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46711310] [2020-10-23 21:47:13,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 21:47:13,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:13,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 21:47:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:47:13,323 INFO L87 Difference]: Start difference. First operand 390 states and 430 transitions. Second operand 16 states. [2020-10-23 21:47:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:14,143 INFO L93 Difference]: Finished difference Result 575 states and 630 transitions. [2020-10-23 21:47:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 21:47:14,143 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-10-23 21:47:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:14,146 INFO L225 Difference]: With dead ends: 575 [2020-10-23 21:47:14,146 INFO L226 Difference]: Without dead ends: 380 [2020-10-23 21:47:14,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2020-10-23 21:47:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-23 21:47:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 339. [2020-10-23 21:47:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-23 21:47:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 372 transitions. [2020-10-23 21:47:14,188 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 372 transitions. Word has length 91 [2020-10-23 21:47:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:14,188 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 372 transitions. [2020-10-23 21:47:14,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 21:47:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 372 transitions. [2020-10-23 21:47:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 21:47:14,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:14,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:14,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 21:47:14,191 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:14,191 INFO L82 PathProgramCache]: Analyzing trace with hash 498819125, now seen corresponding path program 1 times [2020-10-23 21:47:14,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:14,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059271675] [2020-10-23 21:47:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:14,778 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:14,780 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-23 21:47:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:14,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059271675] [2020-10-23 21:47:14,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:14,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 21:47:14,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615190879] [2020-10-23 21:47:14,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 21:47:14,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 21:47:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:47:14,942 INFO L87 Difference]: Start difference. First operand 339 states and 372 transitions. Second operand 12 states. [2020-10-23 21:47:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:15,742 INFO L93 Difference]: Finished difference Result 613 states and 673 transitions. [2020-10-23 21:47:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 21:47:15,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 92 [2020-10-23 21:47:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:15,748 INFO L225 Difference]: With dead ends: 613 [2020-10-23 21:47:15,748 INFO L226 Difference]: Without dead ends: 491 [2020-10-23 21:47:15,750 INFO L677 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 [2020-10-23 21:47:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-23 21:47:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 369. [2020-10-23 21:47:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-23 21:47:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 406 transitions. [2020-10-23 21:47:15,785 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 406 transitions. Word has length 92 [2020-10-23 21:47:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:15,786 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 406 transitions. [2020-10-23 21:47:15,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 21:47:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 406 transitions. [2020-10-23 21:47:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-23 21:47:15,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:15,788 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, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:15,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 21:47:15,789 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash 151465976, now seen corresponding path program 2 times [2020-10-23 21:47:15,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:15,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402298843] [2020-10-23 21:47:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:16,349 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:16,351 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:47:16,367 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:47:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:47:16,384 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:47:16,424 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:47:16,425 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:47:16,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 21:47:16,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:47:16 BoogieIcfgContainer [2020-10-23 21:47:16,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:47:16,448 INFO L168 Benchmark]: Toolchain (without parser) took 17620.48 ms. Allocated memory was 125.8 MB in the beginning and 325.1 MB in the end (delta: 199.2 MB). Free memory was 102.4 MB in the beginning and 147.8 MB in the end (delta: -45.4 MB). Peak memory consumption was 154.9 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:16,449 INFO L168 Benchmark]: CDTParser took 0.98 ms. Allocated memory is still 125.8 MB. Free memory is still 90.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:47:16,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.43 ms. Allocated memory is still 125.8 MB. Free memory was 101.7 MB in the beginning and 90.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:16,450 INFO L168 Benchmark]: Boogie Preprocessor took 88.34 ms. Allocated memory is still 125.8 MB. Free memory was 90.4 MB in the beginning and 88.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:16,451 INFO L168 Benchmark]: RCFGBuilder took 559.62 ms. Allocated memory was 125.8 MB in the beginning and 156.2 MB in the end (delta: 30.4 MB). Free memory was 88.4 MB in the beginning and 119.8 MB in the end (delta: -31.5 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:16,451 INFO L168 Benchmark]: TraceAbstraction took 16548.19 ms. Allocated memory was 156.2 MB in the beginning and 325.1 MB in the end (delta: 168.8 MB). Free memory was 119.4 MB in the beginning and 147.8 MB in the end (delta: -28.4 MB). Peak memory consumption was 139.8 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:16,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.98 ms. Allocated memory is still 125.8 MB. Free memory is still 90.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 411.43 ms. Allocated memory is still 125.8 MB. Free memory was 101.7 MB in the beginning and 90.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.34 ms. Allocated memory is still 125.8 MB. Free memory was 90.4 MB in the beginning and 88.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 559.62 ms. Allocated memory was 125.8 MB in the beginning and 156.2 MB in the end (delta: 30.4 MB). Free memory was 88.4 MB in the beginning and 119.8 MB in the end (delta: -31.5 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16548.19 ms. Allocated memory was 156.2 MB in the beginning and 325.1 MB in the end (delta: 168.8 MB). Free memory was 119.4 MB in the beginning and 147.8 MB in the end (delta: -28.4 MB). Peak memory consumption was 139.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L85] char A [2 + 2 + 4 +1]; [L86] A[2 + 2 + 4] = 0 [L87] CALL parse_expression_list (A) [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; [L61] COND FALSE !(!str) [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j [L72] CALL r_strncpy(str2, str+start, j-start+1) [L41] return strncpy(dest,src,n); [L72] RET r_strncpy(str2, str+start, j-start+1) [L73] CALL __VERIFIER_assert(j - start + 1 < 2) [L14] COND TRUE !(cond) [L15] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "verisec_OpenSER_cases1_stripFullBoth_arr.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.4s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2186 SDtfs, 2652 SDslu, 8928 SDs, 0 SdLazy, 5597 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 16 MinimizatonAttempts, 993 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...