/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/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:32:09,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:32:09,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:32:09,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:32:09,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:32:09,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:32:09,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:32:09,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:32:09,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:32:09,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:32:09,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:32:09,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 05:32:09,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:32:09,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:32:09,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:32:09,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:32:09,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:32:09,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:32:09,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:32:09,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:32:09,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:32:09,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:32:09,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:32:09,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:32:09,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 05:32:09,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 05:32:09,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 05:32:09,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 05:32:09,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 05:32:09,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 05:32:09,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 05:32:09,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 05:32:09,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 05:32:09,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 05:32:09,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 05:32:09,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 05:32:09,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 05:32:09,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 05:32:09,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:32:09,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:32:09,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:32:09,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:32:09,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:32:09,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:32:09,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:32:09,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:32:09,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:32:09,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:32:09,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:32:09,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:32:09,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:32:09,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:32:09,812 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:32:09,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:32:09,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:32:09,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:32:09,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:32:09,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:32:09,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:32:09,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:32:09,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:32:09,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:32:09,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:32:09,815 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:32:09,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:32:10,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:32:10,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:32:10,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:32:10,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:32:10,129 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:32:10,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-05-06 05:32:10,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1b5cc8c/6b86f907be2044c59e8253dd0d14ecb1/FLAG59705d88d [2021-05-06 05:32:10,659 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:32:10,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-05-06 05:32:10,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1b5cc8c/6b86f907be2044c59e8253dd0d14ecb1/FLAG59705d88d [2021-05-06 05:32:11,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1b5cc8c/6b86f907be2044c59e8253dd0d14ecb1 [2021-05-06 05:32:11,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:32:11,028 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:32:11,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:32:11,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:32:11,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:32:11,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39eae1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11, skipping insertion in model container [2021-05-06 05:32:11,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:32:11,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:32:11,170 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/verisec_OpenSER_cases1_stripFullBoth_arr.i[840,853] [2021-05-06 05:32:11,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:32:11,204 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:32:11,248 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/verisec_OpenSER_cases1_stripFullBoth_arr.i[840,853] [2021-05-06 05:32:11,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:32:11,293 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:32:11,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11 WrapperNode [2021-05-06 05:32:11,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:32:11,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:32:11,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:32:11,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:32:11,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:32:11,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:32:11,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:32:11,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:32:11,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (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 [2021-05-06 05:32:11,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:32:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:32:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:32:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:32:11,419 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2021-05-06 05:32:11,420 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2021-05-06 05:32:11,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:32:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:32:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:32:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 05:32:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 05:32:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:32:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:32:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:32:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-05-06 05:32:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-05-06 05:32:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-05-06 05:32:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-05-06 05:32:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2021-05-06 05:32:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-05-06 05:32:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-05-06 05:32:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-05-06 05:32:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2021-05-06 05:32:11,425 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:32:11,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:32:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:32:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:32:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:32:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:32:11,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:32:11,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:32:11,929 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 05:32:11,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:32:11 BoogieIcfgContainer [2021-05-06 05:32:11,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:32:11,932 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:32:11,932 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:32:11,933 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:32:11,935 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:32:11" (1/1) ... [2021-05-06 05:32:11,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:32:11 BasicIcfg [2021-05-06 05:32:11,954 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:32:11,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:32:11,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:32:11,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:32:11,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:32:11" (1/4) ... [2021-05-06 05:32:11,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469d4f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:32:11, skipping insertion in model container [2021-05-06 05:32:11,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:32:11" (2/4) ... [2021-05-06 05:32:11,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469d4f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:32:11, skipping insertion in model container [2021-05-06 05:32:11,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:32:11" (3/4) ... [2021-05-06 05:32:11,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469d4f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:32:11, skipping insertion in model container [2021-05-06 05:32:11,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:32:11" (4/4) ... [2021-05-06 05:32:11,963 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.iJordan [2021-05-06 05:32:11,967 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:32:11,972 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:32:11,986 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:32:12,011 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:32:12,011 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:32:12,011 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:32:12,011 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:32:12,011 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:32:12,011 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:32:12,012 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:32:12,012 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:32:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 39 states have (on average 1.435897435897436) internal successors, (56), 40 states have internal predecessors, (56), 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) [2021-05-06 05:32:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 05:32:12,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:12,034 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] [2021-05-06 05:32:12,034 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1482838745, now seen corresponding path program 1 times [2021-05-06 05:32:12,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:12,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508205826] [2021-05-06 05:32:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:12,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:12,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-05-06 05:32:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508205826] [2021-05-06 05:32:12,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508205826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:12,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:12,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:32:12,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937075568] [2021-05-06 05:32:12,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:32:12,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:32:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:32:12,343 INFO L87 Difference]: Start difference. First operand has 51 states, 39 states have (on average 1.435897435897436) internal successors, (56), 40 states have internal predecessors, (56), 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 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2021-05-06 05:32:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:12,507 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-05-06 05:32:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:32:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 29 [2021-05-06 05:32:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:12,515 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:32:12,515 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 05:32:12,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:32:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 05:32:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 05:32:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 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) [2021-05-06 05:32:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-05-06 05:32:12,558 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2021-05-06 05:32:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:12,559 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-05-06 05:32:12,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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) [2021-05-06 05:32:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-05-06 05:32:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 05:32:12,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:12,560 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] [2021-05-06 05:32:12,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:32:12,561 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1955249573, now seen corresponding path program 1 times [2021-05-06 05:32:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:12,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580723658] [2021-05-06 05:32:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:12,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 05:32:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:12,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:12,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580723658] [2021-05-06 05:32:12,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580723658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:12,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:12,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:32:12,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312674740] [2021-05-06 05:32:12,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:32:12,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:32:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:32:12,662 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-05-06 05:32:12,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:12,836 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:32:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:32:12,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 33 [2021-05-06 05:32:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:12,839 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:32:12,839 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 05:32:12,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:32:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 05:32:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 05:32:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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) [2021-05-06 05:32:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-05-06 05:32:12,857 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2021-05-06 05:32:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:12,857 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-05-06 05:32:12,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-05-06 05:32:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-05-06 05:32:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 05:32:12,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:12,858 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] [2021-05-06 05:32:12,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:32:12,859 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:12,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1743898660, now seen corresponding path program 1 times [2021-05-06 05:32:12,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:12,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655053915] [2021-05-06 05:32:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:13,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:13,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 05:32:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:13,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:13,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655053915] [2021-05-06 05:32:13,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655053915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:13,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:13,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:32:13,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120603362] [2021-05-06 05:32:13,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:32:13,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:13,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:32:13,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:32:13,059 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-05-06 05:32:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:13,289 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2021-05-06 05:32:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:32:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 33 [2021-05-06 05:32:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:13,293 INFO L225 Difference]: With dead ends: 71 [2021-05-06 05:32:13,293 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 05:32:13,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:32:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 05:32:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2021-05-06 05:32:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 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) [2021-05-06 05:32:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2021-05-06 05:32:13,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 33 [2021-05-06 05:32:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:13,312 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2021-05-06 05:32:13,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-05-06 05:32:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2021-05-06 05:32:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 05:32:13,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:13,315 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] [2021-05-06 05:32:13,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:32:13,315 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash 883199996, now seen corresponding path program 1 times [2021-05-06 05:32:13,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:13,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685245350] [2021-05-06 05:32:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:13,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:13,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 05:32:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:13,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:13,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685245350] [2021-05-06 05:32:13,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685245350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:13,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:13,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 05:32:13,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283257123] [2021-05-06 05:32:13,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:32:13,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:13,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:32:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:32:13,550 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-05-06 05:32:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:13,904 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2021-05-06 05:32:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:32:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 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 33 [2021-05-06 05:32:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:13,909 INFO L225 Difference]: With dead ends: 115 [2021-05-06 05:32:13,909 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 05:32:13,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:32:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 05:32:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2021-05-06 05:32:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 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) [2021-05-06 05:32:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-05-06 05:32:13,925 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 33 [2021-05-06 05:32:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:13,926 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-05-06 05:32:13,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-05-06 05:32:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-05-06 05:32:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 05:32:13,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:13,927 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] [2021-05-06 05:32:13,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 05:32:13,927 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash -113872357, now seen corresponding path program 1 times [2021-05-06 05:32:13,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:13,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083078056] [2021-05-06 05:32:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 05:32:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:14,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:14,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083078056] [2021-05-06 05:32:14,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083078056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:14,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:14,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 05:32:14,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343337773] [2021-05-06 05:32:14,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:32:14,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:14,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:32:14,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:32:14,097 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-05-06 05:32:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:14,393 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2021-05-06 05:32:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:32:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 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 33 [2021-05-06 05:32:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:14,395 INFO L225 Difference]: With dead ends: 111 [2021-05-06 05:32:14,395 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 05:32:14,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-06 05:32:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 05:32:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-05-06 05:32:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:32:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2021-05-06 05:32:14,401 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 33 [2021-05-06 05:32:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:14,402 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2021-05-06 05:32:14,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-05-06 05:32:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2021-05-06 05:32:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 05:32:14,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:14,403 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] [2021-05-06 05:32:14,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 05:32:14,404 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1490560960, now seen corresponding path program 1 times [2021-05-06 05:32:14,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:14,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974145276] [2021-05-06 05:32:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-06 05:32:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:14,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:14,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974145276] [2021-05-06 05:32:14,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974145276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:14,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:14,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:32:14,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463404623] [2021-05-06 05:32:14,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:32:14,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:14,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:32:14,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:32:14,453 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-05-06 05:32:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:14,544 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-05-06 05:32:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:32:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 35 [2021-05-06 05:32:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:14,547 INFO L225 Difference]: With dead ends: 99 [2021-05-06 05:32:14,547 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 05:32:14,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:32:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 05:32:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 05:32:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 88 states have internal predecessors, (111), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:32:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 05:32:14,552 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 35 [2021-05-06 05:32:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:14,552 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 05:32:14,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-05-06 05:32:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 05:32:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 05:32:14,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:14,553 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] [2021-05-06 05:32:14,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 05:32:14,554 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash 980026783, now seen corresponding path program 1 times [2021-05-06 05:32:14,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:14,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639934266] [2021-05-06 05:32:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-06 05:32:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:14,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639934266] [2021-05-06 05:32:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639934266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:14,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:14,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:32:14,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9215490] [2021-05-06 05:32:14,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:32:14,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:14,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:32:14,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:32:14,623 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2021-05-06 05:32:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:14,766 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2021-05-06 05:32:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:32:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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 35 [2021-05-06 05:32:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:14,769 INFO L225 Difference]: With dead ends: 120 [2021-05-06 05:32:14,769 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 05:32:14,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:32:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 05:32:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-05-06 05:32:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:32:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2021-05-06 05:32:14,774 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 35 [2021-05-06 05:32:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:14,774 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2021-05-06 05:32:14,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 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) [2021-05-06 05:32:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2021-05-06 05:32:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 05:32:14,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:14,775 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 05:32:14,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 05:32:14,776 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1227057006, now seen corresponding path program 1 times [2021-05-06 05:32:14,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:14,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089143473] [2021-05-06 05:32:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-06 05:32:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 05:32:14,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:14,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089143473] [2021-05-06 05:32:14,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089143473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:32:14,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:32:14,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 05:32:14,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843925847] [2021-05-06 05:32:14,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:32:14,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:14,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:32:14,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:32:14,875 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-05-06 05:32:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:15,130 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2021-05-06 05:32:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 05:32:15,130 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 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 38 [2021-05-06 05:32:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:15,131 INFO L225 Difference]: With dead ends: 130 [2021-05-06 05:32:15,131 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 05:32:15,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 05:32:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 05:32:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2021-05-06 05:32:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.25) internal successors, (115), 93 states have internal predecessors, (115), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:32:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2021-05-06 05:32:15,136 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 38 [2021-05-06 05:32:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:15,137 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2021-05-06 05:32:15,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-05-06 05:32:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2021-05-06 05:32:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:32:15,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:15,138 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 05:32:15,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 05:32:15,148 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:15,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1122955826, now seen corresponding path program 1 times [2021-05-06 05:32:15,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:15,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483596980] [2021-05-06 05:32:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:15,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-05-06 05:32:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:15,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483596980] [2021-05-06 05:32:15,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483596980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:32:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756872754] [2021-05-06 05:32:15,216 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 [2021-05-06 05:32:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-06 05:32:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:32:15,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:15,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:15,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:15,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:15,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:15,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:15,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756872754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:32:15,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:32:15,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-06 05:32:15,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171376929] [2021-05-06 05:32:15,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:32:15,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:32:15,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:32:15,507 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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) [2021-05-06 05:32:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:15,709 INFO L93 Difference]: Finished difference Result 188 states and 231 transitions. [2021-05-06 05:32:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:32:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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 40 [2021-05-06 05:32:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:15,711 INFO L225 Difference]: With dead ends: 188 [2021-05-06 05:32:15,711 INFO L226 Difference]: Without dead ends: 179 [2021-05-06 05:32:15,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:32:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-06 05:32:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-05-06 05:32:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.220472440944882) internal successors, (155), 128 states have internal predecessors, (155), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:32:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 171 transitions. [2021-05-06 05:32:15,730 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 171 transitions. Word has length 40 [2021-05-06 05:32:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:15,730 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 171 transitions. [2021-05-06 05:32:15,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 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) [2021-05-06 05:32:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 171 transitions. [2021-05-06 05:32:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 05:32:15,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:15,735 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-06 05:32:15,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 05:32:15,936 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash 598095488, now seen corresponding path program 2 times [2021-05-06 05:32:15,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:15,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163173773] [2021-05-06 05:32:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:16,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:16,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-06 05:32:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:16,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:16,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163173773] [2021-05-06 05:32:16,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163173773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:32:16,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829249634] [2021-05-06 05:32:16,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-06 05:32:16,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:32:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:32:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 05:32:16,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:32:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:16,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829249634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:32:16,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:32:16,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-05-06 05:32:16,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357156162] [2021-05-06 05:32:16,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 05:32:16,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 05:32:16,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-06 05:32:16,478 INFO L87 Difference]: Start difference. First operand 141 states and 171 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:32:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:17,115 INFO L93 Difference]: Finished difference Result 221 states and 269 transitions. [2021-05-06 05:32:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 05:32:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-05-06 05:32:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:17,117 INFO L225 Difference]: With dead ends: 221 [2021-05-06 05:32:17,117 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 05:32:17,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-05-06 05:32:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 05:32:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 133. [2021-05-06 05:32:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 121 states have (on average 1.256198347107438) internal successors, (152), 122 states have internal predecessors, (152), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:32:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 164 transitions. [2021-05-06 05:32:17,123 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 164 transitions. Word has length 45 [2021-05-06 05:32:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:17,123 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 164 transitions. [2021-05-06 05:32:17,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:32:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 164 transitions. [2021-05-06 05:32:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 05:32:17,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:17,125 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-06 05:32:17,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:32:17,343 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash 189271263, now seen corresponding path program 1 times [2021-05-06 05:32:17,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:17,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386511025] [2021-05-06 05:32:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:17,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:32:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-06 05:32:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:17,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:32:17,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386511025] [2021-05-06 05:32:17,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386511025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:32:17,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834575939] [2021-05-06 05:32:17,455 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 [2021-05-06 05:32:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:32:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 05:32:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:32:17,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:32:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:32:17,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834575939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:32:17,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:32:17,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-06 05:32:17,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849273373] [2021-05-06 05:32:17,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 05:32:17,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:32:17,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 05:32:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-06 05:32:17,834 INFO L87 Difference]: Start difference. First operand 133 states and 164 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 16 states have internal predecessors, (71), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:32:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:32:18,335 INFO L93 Difference]: Finished difference Result 215 states and 266 transitions. [2021-05-06 05:32:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 05:32:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 16 states have internal predecessors, (71), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-05-06 05:32:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:32:18,340 INFO L225 Difference]: With dead ends: 215 [2021-05-06 05:32:18,340 INFO L226 Difference]: Without dead ends: 215 [2021-05-06 05:32:18,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-05-06 05:32:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-06 05:32:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 152. [2021-05-06 05:32:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.292857142857143) internal successors, (181), 141 states have internal predecessors, (181), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:32:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2021-05-06 05:32:18,349 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 45 [2021-05-06 05:32:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:32:18,349 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2021-05-06 05:32:18,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 16 states have internal predecessors, (71), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:32:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2021-05-06 05:32:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 05:32:18,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:32:18,350 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-06 05:32:18,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 05:32:18,569 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:32:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:32:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1607680096, now seen corresponding path program 1 times [2021-05-06 05:32:18,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:32:18,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105048507] [2021-05-06 05:32:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:32:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:32:18,591 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:32:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:32:18,625 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:32:18,676 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 05:32:18,677 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 05:32:18,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-06 05:32:18,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:32:18 BasicIcfg [2021-05-06 05:32:18,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:32:18,747 INFO L168 Benchmark]: Toolchain (without parser) took 7718.74 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 144.1 MB in the beginning and 158.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 64.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:32:18,747 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 178.3 MB. Free memory is still 160.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:32:18,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.78 ms. Allocated memory is still 178.3 MB. Free memory was 143.9 MB in the beginning and 160.4 MB in the end (delta: -16.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 05:32:18,747 INFO L168 Benchmark]: Boogie Preprocessor took 52.72 ms. Allocated memory is still 178.3 MB. Free memory was 160.4 MB in the beginning and 158.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:32:18,747 INFO L168 Benchmark]: RCFGBuilder took 578.51 ms. Allocated memory is still 178.3 MB. Free memory was 158.5 MB in the beginning and 131.6 MB in the end (delta: 26.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-05-06 05:32:18,747 INFO L168 Benchmark]: IcfgTransformer took 22.14 ms. Allocated memory is still 178.3 MB. Free memory was 131.2 MB in the beginning and 129.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:32:18,747 INFO L168 Benchmark]: TraceAbstraction took 6790.59 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 128.8 MB in the beginning and 158.8 MB in the end (delta: -30.0 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:32:18,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 178.3 MB. Free memory is still 160.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.78 ms. Allocated memory is still 178.3 MB. Free memory was 143.9 MB in the beginning and 160.4 MB in the end (delta: -16.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.72 ms. Allocated memory is still 178.3 MB. Free memory was 160.4 MB in the beginning and 158.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.51 ms. Allocated memory is still 178.3 MB. Free memory was 158.5 MB in the beginning and 131.6 MB in the end (delta: 26.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * IcfgTransformer took 22.14 ms. Allocated memory is still 178.3 MB. Free memory was 131.2 MB in the beginning and 129.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6790.59 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 128.8 MB in the beginning and 158.8 MB in the end (delta: -30.0 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L85] char A [2 + 2 + 4 +1]; [L86] A[2 + 2 + 4] = 0 VAL [A={6:0}] [L87] CALL parse_expression_list (A) VAL [str={6:0}] [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; VAL [i=-1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L61] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L63] i++ [L64] str[i] [L65] case 0: VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=-1] [L80] EXPR str[i] VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=-1] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=54] [L80] EXPR str[i] VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=54] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=-1, str[start]=-1] [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=-1] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 VAL [i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [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') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=54, str[j]=54] [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=54, str[j]=54] [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=54] [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j VAL [i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L72] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={3:0}, src={6:0}] [L41] return strncpy(dest,src,n); [L72] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={52:55}, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L73] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L15] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6668.8ms, OverallIterations: 12, TraceHistogramMax: 3, EmptinessCheckTime: 25.1ms, AutomataDifference: 3125.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 530 SDtfs, 1116 SDslu, 1712 SDs, 0 SdLazy, 2315 SolverSat, 314 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1720.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 286 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1424.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=11, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 132.2ms AutomataMinimizationTime, 11 MinimizatonAttempts, 283 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 72.4ms SsaConstructionTime, 266.3ms SatisfiabilityAnalysisTime, 1969.2ms InterpolantComputationTime, 574 NumberOfCodeBlocks, 574 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 515 ConstructedInterpolants, 0 QuantifiedInterpolants, 1851 SizeOfPredicates, 7 NumberOfNonLiveVariables, 587 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 2/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...