/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:50:15,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:50:15,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:50:15,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:50:15,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:50:15,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:50:15,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:50:15,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:50:15,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:50:15,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:50:15,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:50:15,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:50:15,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:50:15,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:50:15,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:50:15,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:50:15,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:50:15,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:50:15,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:50:15,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:50:15,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:50:15,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:50:15,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:50:15,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:50:15,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 17:50:15,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 17:50:15,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 17:50:15,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 17:50:15,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 17:50:15,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 17:50:15,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:50:15,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:50:15,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:50:15,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:50:15,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:50:15,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:50:15,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:50:15,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:50:15,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:50:15,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:50:15,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:50:15,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:50:15,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:50:15,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:50:15,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:50:15,179 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:50:15,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:50:15,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:50:15,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:50:15,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:50:15,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:50:15,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:50:15,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:50:15,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:50:15,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:50:15,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:50:15,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:50:15,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:50:15,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:50:15,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:50:15,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:50:15,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:50:15,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:50:15,184 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:50:15,184 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:50:15,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:50:15,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:50:15,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:50:15,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:50:15,530 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:50:15,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2021-05-02 17:50:15,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c18318f/351581b9b9384c18bd614cad3774ec5e/FLAG31af86e36 [2021-05-02 17:50:16,400 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:50:16,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2021-05-02 17:50:16,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c18318f/351581b9b9384c18bd614cad3774ec5e/FLAG31af86e36 [2021-05-02 17:50:16,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c18318f/351581b9b9384c18bd614cad3774ec5e [2021-05-02 17:50:16,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:50:16,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:50:16,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:50:16,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:50:16,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:50:16,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:50:16" (1/1) ... [2021-05-02 17:50:16,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d435b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:16, skipping insertion in model container [2021-05-02 17:50:16,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:50:16" (1/1) ... [2021-05-02 17:50:16,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:50:16,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:50:17,061 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2021-05-02 17:50:17,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:50:17,121 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:50:17,156 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i[878,891] [2021-05-02 17:50:17,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:50:17,194 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:50:17,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17 WrapperNode [2021-05-02 17:50:17,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:50:17,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:50:17,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:50:17,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:50:17,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:50:17,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:50:17,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:50:17,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:50:17,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (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 [2021-05-02 17:50:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:50:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:50:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:50:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:50:17,295 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2021-05-02 17:50:17,295 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2021-05-02 17:50:17,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:50:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:50:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:50:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:50:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:50:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2021-05-02 17:50:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2021-05-02 17:50:17,297 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2021-05-02 17:50:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:50:17,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:50:17,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:50:17,841 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 17:50:17,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:50:17 BoogieIcfgContainer [2021-05-02 17:50:17,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:50:17,844 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:50:17,844 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:50:17,845 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:50:17,847 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:50:17" (1/1) ... [2021-05-02 17:50:17,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:50:17 BasicIcfg [2021-05-02 17:50:17,871 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:50:17,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:50:17,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:50:17,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:50:17,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:50:16" (1/4) ... [2021-05-02 17:50:17,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9b5cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:50:17, skipping insertion in model container [2021-05-02 17:50:17,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:50:17" (2/4) ... [2021-05-02 17:50:17,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9b5cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:50:17, skipping insertion in model container [2021-05-02 17:50:17,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:50:17" (3/4) ... [2021-05-02 17:50:17,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9b5cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:50:17, skipping insertion in model container [2021-05-02 17:50:17,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:50:17" (4/4) ... [2021-05-02 17:50:17,879 INFO L111 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.iJordan [2021-05-02 17:50:17,884 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:50:17,888 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:50:17,902 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:50:17,920 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:50:17,921 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:50:17,921 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:50:17,921 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:50:17,921 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:50:17,921 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:50:17,921 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:50:17,921 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:50:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 44 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:50:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 17:50:17,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:50:17,942 INFO L523 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] [2021-05-02 17:50:17,942 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:50:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:50:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1913248372, now seen corresponding path program 1 times [2021-05-02 17:50:17,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:50:17,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546876759] [2021-05-02 17:50:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:50:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:50:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 17:50:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:50:18,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:50:18,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546876759] [2021-05-02 17:50:18,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546876759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:50:18,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:50:18,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:50:18,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23158921] [2021-05-02 17:50:18,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:50:18,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:50:18,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:50:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:50:18,149 INFO L87 Difference]: Start difference. First operand has 55 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 44 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:50:18,322 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-05-02 17:50:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:50:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-05-02 17:50:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:50:18,333 INFO L225 Difference]: With dead ends: 55 [2021-05-02 17:50:18,333 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 17:50:18,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:50:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 17:50:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 17:50:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:50:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-05-02 17:50:18,361 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 32 [2021-05-02 17:50:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:50:18,361 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-05-02 17:50:18,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-05-02 17:50:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:50:18,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:50:18,363 INFO L523 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] [2021-05-02 17:50:18,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:50:18,363 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:50:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:50:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash -123059233, now seen corresponding path program 1 times [2021-05-02 17:50:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:50:18,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356024812] [2021-05-02 17:50:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:50:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:50:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-02 17:50:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:50:18,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:50:18,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356024812] [2021-05-02 17:50:18,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356024812] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:50:18,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:50:18,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:50:18,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204344076] [2021-05-02 17:50:18,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:50:18,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:50:18,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:50:18,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:50:18,455 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:50:18,586 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-05-02 17:50:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:50:18,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-05-02 17:50:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:50:18,589 INFO L225 Difference]: With dead ends: 49 [2021-05-02 17:50:18,589 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:50:18,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:50:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:50:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-05-02 17:50:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:50:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-05-02 17:50:18,606 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 36 [2021-05-02 17:50:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:50:18,607 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-05-02 17:50:18,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-05-02 17:50:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:50:18,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:50:18,609 INFO L523 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] [2021-05-02 17:50:18,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:50:18,610 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:50:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:50:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash -62292927, now seen corresponding path program 1 times [2021-05-02 17:50:18,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:50:18,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412057932] [2021-05-02 17:50:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:50:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:50:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 17:50:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:50:18,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:50:18,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412057932] [2021-05-02 17:50:18,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412057932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:50:18,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447524017] [2021-05-02 17:50:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:50:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2021-05-02 17:50:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:50:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:50:18,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447524017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:50:18,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:50:18,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-05-02 17:50:18,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346311911] [2021-05-02 17:50:18,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:50:18,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:50:18,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:50:18,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:50:18,949 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:50:18,962 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-05-02 17:50:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:50:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2021-05-02 17:50:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:50:18,964 INFO L225 Difference]: With dead ends: 49 [2021-05-02 17:50:18,964 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:50:18,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:50:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:50:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 17:50:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:50:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 17:50:18,979 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2021-05-02 17:50:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:50:18,979 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 17:50:18,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 17:50:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:50:18,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:50:18,982 INFO L523 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] [2021-05-02 17:50:19,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:50:19,199 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:50:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:50:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2100349216, now seen corresponding path program 1 times [2021-05-02 17:50:19,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:50:19,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398608833] [2021-05-02 17:50:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:50:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:19,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:50:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 17:50:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:50:19,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:50:19,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398608833] [2021-05-02 17:50:19,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398608833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:50:19,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795933530] [2021-05-02 17:50:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:50:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:50:19,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:50:19,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:50:19,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795933530] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:50:19,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:50:19,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-05-02 17:50:19,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436001692] [2021-05-02 17:50:19,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:50:19,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:50:19,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:50:19,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:50:19,554 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:50:19,674 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-05-02 17:50:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:50:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2021-05-02 17:50:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:50:19,678 INFO L225 Difference]: With dead ends: 73 [2021-05-02 17:50:19,678 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 17:50:19,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:50:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 17:50:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-05-02 17:50:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:50:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-05-02 17:50:19,699 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 38 [2021-05-02 17:50:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:50:19,701 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-05-02 17:50:19,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-05-02 17:50:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:50:19,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:50:19,704 INFO L523 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] [2021-05-02 17:50:19,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:50:19,921 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:50:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:50:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2030297792, now seen corresponding path program 1 times [2021-05-02 17:50:19,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:50:19,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26180300] [2021-05-02 17:50:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:50:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:20,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:50:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:20,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 17:50:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:50:20,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:50:20,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26180300] [2021-05-02 17:50:20,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26180300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:50:20,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386682722] [2021-05-02 17:50:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:50:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:50:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:50:20,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:20,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:50:20,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386682722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:50:20,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:50:20,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:50:20,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724154888] [2021-05-02 17:50:20,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:50:20,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:50:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:50:20,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:50:20,225 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:50:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:50:20,326 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-05-02 17:50:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:50:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2021-05-02 17:50:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:50:20,330 INFO L225 Difference]: With dead ends: 56 [2021-05-02 17:50:20,331 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:50:20,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:50:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:50:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 17:50:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:50:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-02 17:50:20,344 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 38 [2021-05-02 17:50:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:50:20,344 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-02 17:50:20,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:50:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-02 17:50:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:50:20,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:50:20,345 INFO L523 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] [2021-05-02 17:50:20,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:50:20,546 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:50:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:50:20,547 INFO L82 PathProgramCache]: Analyzing trace with hash 297175714, now seen corresponding path program 2 times [2021-05-02 17:50:20,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:50:20,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654371852] [2021-05-02 17:50:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:50:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:20,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:50:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:20,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-05-02 17:50:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:50:20,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:50:20,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654371852] [2021-05-02 17:50:20,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654371852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:50:20,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:50:20,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 17:50:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285523673] [2021-05-02 17:50:20,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:50:20,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:50:20,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:50:20,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:50:20,756 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:50:21,014 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2021-05-02 17:50:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:50:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2021-05-02 17:50:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:50:21,015 INFO L225 Difference]: With dead ends: 94 [2021-05-02 17:50:21,015 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:50:21,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:50:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:50:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:50:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 17:50:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:50:21,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2021-05-02 17:50:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:50:21,016 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:50:21,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:50:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:50:21,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:50:21,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 17:50:21,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:50:21 BasicIcfg [2021-05-02 17:50:21,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:50:21,022 INFO L168 Benchmark]: Toolchain (without parser) took 4133.01 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 165.4 MB in the beginning and 217.5 MB in the end (delta: -52.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:50:21,022 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 182.3 MB in the end (delta: 105.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:50:21,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.30 ms. Allocated memory is still 200.3 MB. Free memory was 165.2 MB in the beginning and 181.4 MB in the end (delta: -16.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 17:50:21,022 INFO L168 Benchmark]: Boogie Preprocessor took 34.16 ms. Allocated memory is still 200.3 MB. Free memory was 180.9 MB in the beginning and 179.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:50:21,022 INFO L168 Benchmark]: RCFGBuilder took 611.88 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 150.5 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:50:21,023 INFO L168 Benchmark]: IcfgTransformer took 27.17 ms. Allocated memory is still 200.3 MB. Free memory was 150.5 MB in the beginning and 148.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:50:21,023 INFO L168 Benchmark]: TraceAbstraction took 3148.79 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 147.9 MB in the beginning and 217.5 MB in the end (delta: -69.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:50:21,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 182.3 MB in the end (delta: 105.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.30 ms. Allocated memory is still 200.3 MB. Free memory was 165.2 MB in the beginning and 181.4 MB in the end (delta: -16.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.16 ms. Allocated memory is still 200.3 MB. Free memory was 180.9 MB in the beginning and 179.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 611.88 ms. Allocated memory is still 200.3 MB. Free memory was 179.3 MB in the beginning and 150.5 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. * IcfgTransformer took 27.17 ms. Allocated memory is still 200.3 MB. Free memory was 150.5 MB in the beginning and 148.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3148.79 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 147.9 MB in the beginning and 217.5 MB in the end (delta: -69.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3100.1ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 18.6ms, AutomataDifference: 851.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 312 SDtfs, 160 SDslu, 457 SDs, 0 SdLazy, 394 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 435.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 354.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 75.8ms SsaConstructionTime, 180.5ms SatisfiabilityAnalysisTime, 943.8ms InterpolantComputationTime, 336 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 327 ConstructedInterpolants, 0 QuantifiedInterpolants, 591 SizeOfPredicates, 2 NumberOfNonLiveVariables, 529 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 6/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...