/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 0.2.0-7d8eed3 [2020-11-07 01:58:33,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:58:33,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:58:34,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:58:34,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:58:34,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:58:34,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:58:34,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:58:34,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:58:34,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:58:34,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:58:34,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:58:34,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:58:34,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:58:34,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:58:34,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:58:34,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:58:34,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:58:34,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:58:34,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:58:34,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:58:34,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:58:34,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:58:34,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:58:34,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:58:34,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:58:34,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:58:34,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:58:34,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:58:34,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:58:34,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:58:34,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:58:34,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:58:34,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:58:34,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:58:34,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:58:34,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:58:34,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:58:34,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:58:34,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:58:34,163 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:58:34,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:58:34,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:58:34,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:58:34,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:58:34,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:58:34,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:58:34,165 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:58:34,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:58:34,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:58:34,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:58:34,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:58:34,166 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:58:34,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:58:34,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:58:34,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:34,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:58:34,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:58:34,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:58:34,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:58:34,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:58:34,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:58:34,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:58:34,687 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:58:34,688 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:58:34,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-11-07 01:58:34,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09fc7e3af/2ca1fe03ba5d420ca6c15a50506524c1/FLAGdde5f272f [2020-11-07 01:58:35,548 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:58:35,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-11-07 01:58:35,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09fc7e3af/2ca1fe03ba5d420ca6c15a50506524c1/FLAGdde5f272f [2020-11-07 01:58:35,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09fc7e3af/2ca1fe03ba5d420ca6c15a50506524c1 [2020-11-07 01:58:35,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:58:35,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:58:35,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:35,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:58:35,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:58:35,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:35" (1/1) ... [2020-11-07 01:58:35,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552ff677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:35, skipping insertion in model container [2020-11-07 01:58:35,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:35" (1/1) ... [2020-11-07 01:58:35,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:58:35,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:58:36,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:36,210 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:58:36,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:36,293 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:58:36,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36 WrapperNode [2020-11-07 01:58:36,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:36,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:58:36,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:58:36,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:58:36,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (1/1) ... [2020-11-07 01:58:36,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (1/1) ... [2020-11-07 01:58:36,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (1/1) ... [2020-11-07 01:58:36,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (1/1) ... [2020-11-07 01:58:36,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (1/1) ... [2020-11-07 01:58:36,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (1/1) ... [2020-11-07 01:58:36,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (1/1) ... [2020-11-07 01:58:36,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:58:36,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:58:36,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:58:36,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:58:36,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (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 [2020-11-07 01:58:36,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:58:36,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:58:36,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:58:36,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:58:36,510 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-11-07 01:58:36,511 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-11-07 01:58:36,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:58:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:58:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:58:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 01:58:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 01:58:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:58:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:58:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:58:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-11-07 01:58:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-11-07 01:58:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-11-07 01:58:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-11-07 01:58:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-11-07 01:58:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-11-07 01:58:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-11-07 01:58:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-11-07 01:58:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-11-07 01:58:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-11-07 01:58:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-11-07 01:58:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-11-07 01:58:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-11-07 01:58:36,514 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-11-07 01:58:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-11-07 01:58:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-11-07 01:58:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-11-07 01:58:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-11-07 01:58:36,515 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-11-07 01:58:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-11-07 01:58:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-11-07 01:58:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-11-07 01:58:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-11-07 01:58:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-11-07 01:58:36,516 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-11-07 01:58:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-11-07 01:58:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:58:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:58:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:58:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:58:36,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:58:36,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:58:36,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:58:37,206 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:58:37,206 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 01:58:37,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:37 BoogieIcfgContainer [2020-11-07 01:58:37,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:58:37,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:58:37,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:58:37,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:58:37,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:35" (1/3) ... [2020-11-07 01:58:37,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aa61bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:37, skipping insertion in model container [2020-11-07 01:58:37,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:36" (2/3) ... [2020-11-07 01:58:37,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aa61bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:37, skipping insertion in model container [2020-11-07 01:58:37,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:37" (3/3) ... [2020-11-07 01:58:37,236 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-11-07 01:58:37,263 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:58:37,273 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:58:37,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:58:37,341 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:58:37,341 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:58:37,341 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:58:37,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:58:37,342 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:58:37,342 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:58:37,342 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:58:37,342 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:58:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states. [2020-11-07 01:58:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 01:58:37,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:37,388 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] [2020-11-07 01:58:37,389 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1346984002, now seen corresponding path program 1 times [2020-11-07 01:58:37,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:37,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963919435] [2020-11-07 01:58:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:37,520 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:37,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:37,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-07 01:58:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:37,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963919435] [2020-11-07 01:58:37,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:37,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:58:37,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441923856] [2020-11-07 01:58:37,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:58:37,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:37,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:58:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:37,867 INFO L87 Difference]: Start difference. First operand 133 states. Second operand 3 states. [2020-11-07 01:58:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:38,469 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2020-11-07 01:58:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:58:38,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-11-07 01:58:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:38,489 INFO L225 Difference]: With dead ends: 239 [2020-11-07 01:58:38,490 INFO L226 Difference]: Without dead ends: 108 [2020-11-07 01:58:38,502 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 [2020-11-07 01:58:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-07 01:58:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-11-07 01:58:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-07 01:58:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2020-11-07 01:58:38,635 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 54 [2020-11-07 01:58:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:38,636 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2020-11-07 01:58:38,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:58:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2020-11-07 01:58:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-07 01:58:38,644 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:38,645 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] [2020-11-07 01:58:38,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:58:38,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash 746606165, now seen corresponding path program 1 times [2020-11-07 01:58:38,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:38,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371439667] [2020-11-07 01:58:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:38,665 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:38,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:38,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-07 01:58:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:38,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371439667] [2020-11-07 01:58:38,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:38,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:58:38,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027595707] [2020-11-07 01:58:38,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:58:38,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:38,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:58:38,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:58:38,813 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 4 states. [2020-11-07 01:58:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:39,134 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2020-11-07 01:58:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 01:58:39,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-11-07 01:58:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:39,138 INFO L225 Difference]: With dead ends: 197 [2020-11-07 01:58:39,138 INFO L226 Difference]: Without dead ends: 109 [2020-11-07 01:58:39,140 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 [2020-11-07 01:58:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-07 01:58:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-11-07 01:58:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-07 01:58:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2020-11-07 01:58:39,159 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 66 [2020-11-07 01:58:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:39,160 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2020-11-07 01:58:39,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:58:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2020-11-07 01:58:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 01:58:39,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:39,163 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] [2020-11-07 01:58:39,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:58:39,163 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1799427698, now seen corresponding path program 1 times [2020-11-07 01:58:39,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:39,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143469855] [2020-11-07 01:58:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:39,169 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:39,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:39,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-11-07 01:58:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:39,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143469855] [2020-11-07 01:58:39,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:39,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:58:39,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399617350] [2020-11-07 01:58:39,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:58:39,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:58:39,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:39,562 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand 8 states. [2020-11-07 01:58:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:40,261 INFO L93 Difference]: Finished difference Result 216 states and 240 transitions. [2020-11-07 01:58:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 01:58:40,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-11-07 01:58:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:40,268 INFO L225 Difference]: With dead ends: 216 [2020-11-07 01:58:40,268 INFO L226 Difference]: Without dead ends: 212 [2020-11-07 01:58:40,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-07 01:58:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-11-07 01:58:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2020-11-07 01:58:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-11-07 01:58:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2020-11-07 01:58:40,304 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 68 [2020-11-07 01:58:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:40,305 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2020-11-07 01:58:40,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:58:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2020-11-07 01:58:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-07 01:58:40,309 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:40,309 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] [2020-11-07 01:58:40,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:58:40,310 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1878630598, now seen corresponding path program 1 times [2020-11-07 01:58:40,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:40,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898499089] [2020-11-07 01:58:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:40,315 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:40,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:40,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-07 01:58:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:40,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898499089] [2020-11-07 01:58:40,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:40,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:58:40,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456649182] [2020-11-07 01:58:40,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:58:40,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:40,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:58:40,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:40,610 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand 12 states. [2020-11-07 01:58:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:41,578 INFO L93 Difference]: Finished difference Result 456 states and 517 transitions. [2020-11-07 01:58:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 01:58:41,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-11-07 01:58:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:41,585 INFO L225 Difference]: With dead ends: 456 [2020-11-07 01:58:41,585 INFO L226 Difference]: Without dead ends: 364 [2020-11-07 01:58:41,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-11-07 01:58:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-11-07 01:58:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 209. [2020-11-07 01:58:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-11-07 01:58:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 237 transitions. [2020-11-07 01:58:41,634 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 237 transitions. Word has length 71 [2020-11-07 01:58:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:41,636 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 237 transitions. [2020-11-07 01:58:41,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:58:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 237 transitions. [2020-11-07 01:58:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-07 01:58:41,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:41,648 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] [2020-11-07 01:58:41,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:58:41,648 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1354483306, now seen corresponding path program 1 times [2020-11-07 01:58:41,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:41,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596770517] [2020-11-07 01:58:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:41,657 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:41,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:41,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-07 01:58:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:41,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596770517] [2020-11-07 01:58:41,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:41,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:58:41,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338751694] [2020-11-07 01:58:41,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:58:41,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:41,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:58:41,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:58:41,781 INFO L87 Difference]: Start difference. First operand 209 states and 237 transitions. Second operand 4 states. [2020-11-07 01:58:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:42,103 INFO L93 Difference]: Finished difference Result 301 states and 340 transitions. [2020-11-07 01:58:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 01:58:42,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-11-07 01:58:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:42,111 INFO L225 Difference]: With dead ends: 301 [2020-11-07 01:58:42,112 INFO L226 Difference]: Without dead ends: 211 [2020-11-07 01:58:42,113 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 [2020-11-07 01:58:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-11-07 01:58:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-11-07 01:58:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-11-07 01:58:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 238 transitions. [2020-11-07 01:58:42,172 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 238 transitions. Word has length 71 [2020-11-07 01:58:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:42,173 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 238 transitions. [2020-11-07 01:58:42,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:58:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 238 transitions. [2020-11-07 01:58:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-07 01:58:42,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:42,178 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] [2020-11-07 01:58:42,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:58:42,179 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash -644302664, now seen corresponding path program 1 times [2020-11-07 01:58:42,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:42,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088957247] [2020-11-07 01:58:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:42,184 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-07 01:58:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:42,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088957247] [2020-11-07 01:58:42,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:42,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:58:42,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500589014] [2020-11-07 01:58:42,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:58:42,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:42,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:58:42,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:58:42,337 INFO L87 Difference]: Start difference. First operand 211 states and 238 transitions. Second operand 5 states. [2020-11-07 01:58:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:42,668 INFO L93 Difference]: Finished difference Result 322 states and 361 transitions. [2020-11-07 01:58:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:58:42,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-11-07 01:58:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:42,672 INFO L225 Difference]: With dead ends: 322 [2020-11-07 01:58:42,672 INFO L226 Difference]: Without dead ends: 223 [2020-11-07 01:58:42,674 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 [2020-11-07 01:58:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-07 01:58:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2020-11-07 01:58:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-11-07 01:58:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 242 transitions. [2020-11-07 01:58:42,709 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 242 transitions. Word has length 72 [2020-11-07 01:58:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:42,710 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 242 transitions. [2020-11-07 01:58:42,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:58:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 242 transitions. [2020-11-07 01:58:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 01:58:42,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:42,712 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] [2020-11-07 01:58:42,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:58:42,712 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:42,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:42,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1665835257, now seen corresponding path program 1 times [2020-11-07 01:58:42,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:42,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572305752] [2020-11-07 01:58:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:42,718 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-11-07 01:58:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:42,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572305752] [2020-11-07 01:58:42,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:42,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:58:42,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900347114] [2020-11-07 01:58:42,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:58:42,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:58:42,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:58:42,863 INFO L87 Difference]: Start difference. First operand 215 states and 242 transitions. Second operand 6 states. [2020-11-07 01:58:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:43,266 INFO L93 Difference]: Finished difference Result 390 states and 436 transitions. [2020-11-07 01:58:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 01:58:43,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-11-07 01:58:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:43,270 INFO L225 Difference]: With dead ends: 390 [2020-11-07 01:58:43,271 INFO L226 Difference]: Without dead ends: 276 [2020-11-07 01:58:43,272 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 [2020-11-07 01:58:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-07 01:58:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2020-11-07 01:58:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-11-07 01:58:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 245 transitions. [2020-11-07 01:58:43,315 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 245 transitions. Word has length 73 [2020-11-07 01:58:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:43,317 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 245 transitions. [2020-11-07 01:58:43,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:58:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 245 transitions. [2020-11-07 01:58:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-07 01:58:43,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:43,319 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] [2020-11-07 01:58:43,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:58:43,320 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash -14206149, now seen corresponding path program 1 times [2020-11-07 01:58:43,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:43,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854459264] [2020-11-07 01:58:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:43,327 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:43,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:43,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-07 01:58:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:43,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854459264] [2020-11-07 01:58:43,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:43,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:58:43,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790417171] [2020-11-07 01:58:43,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:58:43,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:58:43,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:58:43,441 INFO L87 Difference]: Start difference. First operand 219 states and 245 transitions. Second operand 6 states. [2020-11-07 01:58:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:43,885 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2020-11-07 01:58:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:58:43,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-11-07 01:58:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:43,888 INFO L225 Difference]: With dead ends: 362 [2020-11-07 01:58:43,888 INFO L226 Difference]: Without dead ends: 263 [2020-11-07 01:58:43,890 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 [2020-11-07 01:58:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-07 01:58:43,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 219. [2020-11-07 01:58:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-11-07 01:58:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 244 transitions. [2020-11-07 01:58:43,916 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 244 transitions. Word has length 74 [2020-11-07 01:58:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:43,917 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 244 transitions. [2020-11-07 01:58:43,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:58:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 244 transitions. [2020-11-07 01:58:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-07 01:58:43,919 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:43,919 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] [2020-11-07 01:58:43,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:58:43,920 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1638680456, now seen corresponding path program 1 times [2020-11-07 01:58:43,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:43,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131467313] [2020-11-07 01:58:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:43,924 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-11-07 01:58:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:44,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131467313] [2020-11-07 01:58:44,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:44,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:58:44,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429501400] [2020-11-07 01:58:44,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:58:44,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:44,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:58:44,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:58:44,045 INFO L87 Difference]: Start difference. First operand 219 states and 244 transitions. Second operand 8 states. [2020-11-07 01:58:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:44,637 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2020-11-07 01:58:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 01:58:44,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-11-07 01:58:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:44,640 INFO L225 Difference]: With dead ends: 464 [2020-11-07 01:58:44,641 INFO L226 Difference]: Without dead ends: 305 [2020-11-07 01:58:44,642 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 [2020-11-07 01:58:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-11-07 01:58:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 226. [2020-11-07 01:58:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-11-07 01:58:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 248 transitions. [2020-11-07 01:58:44,669 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 248 transitions. Word has length 76 [2020-11-07 01:58:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:44,670 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 248 transitions. [2020-11-07 01:58:44,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:58:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 248 transitions. [2020-11-07 01:58:44,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-07 01:58:44,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:44,672 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] [2020-11-07 01:58:44,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:58:44,672 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1528930525, now seen corresponding path program 1 times [2020-11-07 01:58:44,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:44,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253457908] [2020-11-07 01:58:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:44,770 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:44,776 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-11-07 01:58:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:44,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253457908] [2020-11-07 01:58:44,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:44,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:58:44,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001669070] [2020-11-07 01:58:44,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:58:44,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:44,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:58:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:58:44,986 INFO L87 Difference]: Start difference. First operand 226 states and 248 transitions. Second operand 10 states. [2020-11-07 01:58:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:45,932 INFO L93 Difference]: Finished difference Result 461 states and 506 transitions. [2020-11-07 01:58:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 01:58:45,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-11-07 01:58:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:45,936 INFO L225 Difference]: With dead ends: 461 [2020-11-07 01:58:45,937 INFO L226 Difference]: Without dead ends: 347 [2020-11-07 01:58:45,939 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 [2020-11-07 01:58:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-11-07 01:58:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 282. [2020-11-07 01:58:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-11-07 01:58:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 311 transitions. [2020-11-07 01:58:45,984 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 311 transitions. Word has length 78 [2020-11-07 01:58:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:45,986 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 311 transitions. [2020-11-07 01:58:45,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:58:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 311 transitions. [2020-11-07 01:58:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-07 01:58:45,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:45,988 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] [2020-11-07 01:58:45,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:58:45,988 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash 911510761, now seen corresponding path program 1 times [2020-11-07 01:58:45,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:45,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702898690] [2020-11-07 01:58:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:46,036 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:46,040 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:46,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-07 01:58:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:46,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702898690] [2020-11-07 01:58:46,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:46,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 01:58:46,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678519592] [2020-11-07 01:58:46,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 01:58:46,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:46,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 01:58:46,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-07 01:58:46,355 INFO L87 Difference]: Start difference. First operand 282 states and 311 transitions. Second operand 14 states. [2020-11-07 01:58:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:47,235 INFO L93 Difference]: Finished difference Result 460 states and 502 transitions. [2020-11-07 01:58:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 01:58:47,236 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-11-07 01:58:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:47,239 INFO L225 Difference]: With dead ends: 460 [2020-11-07 01:58:47,239 INFO L226 Difference]: Without dead ends: 338 [2020-11-07 01:58:47,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-11-07 01:58:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-11-07 01:58:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 276. [2020-11-07 01:58:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-07 01:58:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 304 transitions. [2020-11-07 01:58:47,274 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 304 transitions. Word has length 81 [2020-11-07 01:58:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:47,274 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 304 transitions. [2020-11-07 01:58:47,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 01:58:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 304 transitions. [2020-11-07 01:58:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 01:58:47,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:47,276 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] [2020-11-07 01:58:47,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:58:47,277 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:47,278 INFO L82 PathProgramCache]: Analyzing trace with hash -462249594, now seen corresponding path program 1 times [2020-11-07 01:58:47,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:47,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731817122] [2020-11-07 01:58:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:47,331 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:47,333 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:47,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:47,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-11-07 01:58:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731817122] [2020-11-07 01:58:47,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:47,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:58:47,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514337452] [2020-11-07 01:58:47,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:58:47,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:58:47,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:58:47,509 INFO L87 Difference]: Start difference. First operand 276 states and 304 transitions. Second operand 10 states. [2020-11-07 01:58:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:48,285 INFO L93 Difference]: Finished difference Result 453 states and 498 transitions. [2020-11-07 01:58:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 01:58:48,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-11-07 01:58:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:48,293 INFO L225 Difference]: With dead ends: 453 [2020-11-07 01:58:48,293 INFO L226 Difference]: Without dead ends: 343 [2020-11-07 01:58:48,295 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 [2020-11-07 01:58:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-11-07 01:58:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 280. [2020-11-07 01:58:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-11-07 01:58:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 308 transitions. [2020-11-07 01:58:48,334 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 308 transitions. Word has length 82 [2020-11-07 01:58:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:48,335 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 308 transitions. [2020-11-07 01:58:48,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:58:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 308 transitions. [2020-11-07 01:58:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 01:58:48,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:48,337 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] [2020-11-07 01:58:48,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 01:58:48,337 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1324418476, now seen corresponding path program 1 times [2020-11-07 01:58:48,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:48,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729629140] [2020-11-07 01:58:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:48,391 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:48,394 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 01:58:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:48,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729629140] [2020-11-07 01:58:48,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:48,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:58:48,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966830375] [2020-11-07 01:58:48,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:58:48,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:58:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:58:48,563 INFO L87 Difference]: Start difference. First operand 280 states and 308 transitions. Second operand 10 states. [2020-11-07 01:58:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:49,265 INFO L93 Difference]: Finished difference Result 631 states and 698 transitions. [2020-11-07 01:58:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 01:58:49,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-11-07 01:58:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:49,269 INFO L225 Difference]: With dead ends: 631 [2020-11-07 01:58:49,270 INFO L226 Difference]: Without dead ends: 470 [2020-11-07 01:58:49,271 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 [2020-11-07 01:58:49,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-11-07 01:58:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 391. [2020-11-07 01:58:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-11-07 01:58:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 432 transitions. [2020-11-07 01:58:49,319 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 432 transitions. Word has length 87 [2020-11-07 01:58:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:49,319 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 432 transitions. [2020-11-07 01:58:49,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:58:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 432 transitions. [2020-11-07 01:58:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-07 01:58:49,322 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:49,322 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] [2020-11-07 01:58:49,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 01:58:49,323 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:49,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2103361900, now seen corresponding path program 2 times [2020-11-07 01:58:49,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:49,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218501581] [2020-11-07 01:58:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:49,408 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:49,411 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-11-07 01:58:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:49,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218501581] [2020-11-07 01:58:49,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:49,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:58:49,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610486885] [2020-11-07 01:58:49,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:58:49,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:49,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:58:49,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:49,590 INFO L87 Difference]: Start difference. First operand 391 states and 432 transitions. Second operand 12 states. [2020-11-07 01:58:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:50,697 INFO L93 Difference]: Finished difference Result 734 states and 809 transitions. [2020-11-07 01:58:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 01:58:50,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-11-07 01:58:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:50,702 INFO L225 Difference]: With dead ends: 734 [2020-11-07 01:58:50,703 INFO L226 Difference]: Without dead ends: 563 [2020-11-07 01:58:50,704 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 [2020-11-07 01:58:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-11-07 01:58:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 390. [2020-11-07 01:58:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-11-07 01:58:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 430 transitions. [2020-11-07 01:58:50,757 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 430 transitions. Word has length 88 [2020-11-07 01:58:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:50,757 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 430 transitions. [2020-11-07 01:58:50,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:58:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 430 transitions. [2020-11-07 01:58:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 01:58:50,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:50,760 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] [2020-11-07 01:58:50,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 01:58:50,761 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash -823874600, now seen corresponding path program 2 times [2020-11-07 01:58:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781923583] [2020-11-07 01:58:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:50,845 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:50,847 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-11-07 01:58:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781923583] [2020-11-07 01:58:51,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:51,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 01:58:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456017809] [2020-11-07 01:58:51,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 01:58:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:51,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 01:58:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:58:51,119 INFO L87 Difference]: Start difference. First operand 390 states and 430 transitions. Second operand 16 states. [2020-11-07 01:58:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:52,163 INFO L93 Difference]: Finished difference Result 575 states and 630 transitions. [2020-11-07 01:58:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 01:58:52,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-11-07 01:58:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:52,167 INFO L225 Difference]: With dead ends: 575 [2020-11-07 01:58:52,168 INFO L226 Difference]: Without dead ends: 380 [2020-11-07 01:58:52,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2020-11-07 01:58:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-11-07 01:58:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 339. [2020-11-07 01:58:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-11-07 01:58:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 372 transitions. [2020-11-07 01:58:52,215 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 372 transitions. Word has length 91 [2020-11-07 01:58:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:52,216 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 372 transitions. [2020-11-07 01:58:52,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 01:58:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 372 transitions. [2020-11-07 01:58:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-07 01:58:52,218 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:52,219 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] [2020-11-07 01:58:52,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 01:58:52,219 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash 498819125, now seen corresponding path program 1 times [2020-11-07 01:58:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:52,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079294232] [2020-11-07 01:58:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:52,271 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:52,273 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-11-07 01:58:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:52,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079294232] [2020-11-07 01:58:52,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:52,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:58:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285433462] [2020-11-07 01:58:52,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:58:52,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:58:52,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:58:52,464 INFO L87 Difference]: Start difference. First operand 339 states and 372 transitions. Second operand 12 states. [2020-11-07 01:58:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:53,441 INFO L93 Difference]: Finished difference Result 613 states and 673 transitions. [2020-11-07 01:58:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 01:58:53,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 92 [2020-11-07 01:58:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:53,446 INFO L225 Difference]: With dead ends: 613 [2020-11-07 01:58:53,447 INFO L226 Difference]: Without dead ends: 491 [2020-11-07 01:58:53,448 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 [2020-11-07 01:58:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-11-07 01:58:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 369. [2020-11-07 01:58:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-11-07 01:58:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 406 transitions. [2020-11-07 01:58:53,513 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 406 transitions. Word has length 92 [2020-11-07 01:58:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:53,514 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 406 transitions. [2020-11-07 01:58:53,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:58:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 406 transitions. [2020-11-07 01:58:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-07 01:58:53,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:53,517 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] [2020-11-07 01:58:53,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 01:58:53,517 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:53,518 INFO L82 PathProgramCache]: Analyzing trace with hash 151465976, now seen corresponding path program 2 times [2020-11-07 01:58:53,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:53,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797336563] [2020-11-07 01:58:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:53,622 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:53,624 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:58:53,645 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:58:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:58:53,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:58:53,717 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 01:58:53,717 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 01:58:53,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 01:58:53,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:58:53 BoogieIcfgContainer [2020-11-07 01:58:53,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:58:53,751 INFO L168 Benchmark]: Toolchain (without parser) took 17883.73 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 127.5 MB in the beginning and 259.7 MB in the end (delta: -132.2 MB). Peak memory consumption was 32.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:53,751 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 151.0 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:58:53,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.42 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 115.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:53,753 INFO L168 Benchmark]: Boogie Preprocessor took 112.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:53,753 INFO L168 Benchmark]: RCFGBuilder took 799.16 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 113.2 MB in the end (delta: -268.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:53,755 INFO L168 Benchmark]: TraceAbstraction took 16534.68 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 112.7 MB in the beginning and 259.7 MB in the end (delta: -147.0 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:53,758 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 151.0 MB. Free memory is still 126.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 423.42 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 115.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 112.56 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 799.16 ms. Allocated memory is still 151.0 MB. Free memory was 112.9 MB in the beginning and 113.2 MB in the end (delta: -268.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16534.68 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 112.7 MB in the beginning and 259.7 MB in the end (delta: -147.0 MB). Peak memory consumption was 17.6 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: 16.3s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2189 SDtfs, 2698 SDslu, 8827 SDs, 0 SdLazy, 5582 SolverSat, 279 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 3.0s 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: 0.7s AutomataMinimizationTime, 16 MinimizatonAttempts, 991 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...