/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:22:44,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:22:44,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:22:44,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 23:22:44,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 23:22:44,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 23:22:44,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 23:22:44,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 23:22:44,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 23:22:44,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 23:22:44,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 23:22:44,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 23:22:44,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:22:44,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:22:44,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:22:44,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:22:44,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:22:44,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:22:44,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:22:44,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:22:44,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:22:44,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:22:44,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:22:44,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:22:44,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 23:22:44,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 23:22:44,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 23:22:44,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 23:22:44,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 23:22:44,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 23:22:44,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 23:22:44,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 23:22:44,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 23:22:44,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 23:22:44,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 23:22:44,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 23:22:44,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 23:22:44,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 23:22:44,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:22:44,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:22:44,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:22:44,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:22:44,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:22:44,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:22:44,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:22:44,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:22:44,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:22:44,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:22:44,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:22:44,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:22:44,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:22:44,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:22:44,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:22:44,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:22:44,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:22:44,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:22:44,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:22:44,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:22:44,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:22:44,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:22:44,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:22:44,171 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:22:44,171 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:22:44,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:22:44,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:22:44,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:22:44,400 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:22:44,402 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:22:44,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2022-01-31 23:22:44,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889a11c1d/3a3a25033afe4cac9886ac9d4cb79865/FLAG217a08f4e [2022-01-31 23:22:44,854 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:22:44,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2022-01-31 23:22:44,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889a11c1d/3a3a25033afe4cac9886ac9d4cb79865/FLAG217a08f4e [2022-01-31 23:22:45,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889a11c1d/3a3a25033afe4cac9886ac9d4cb79865 [2022-01-31 23:22:45,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:22:45,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:22:45,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:22:45,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:22:45,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:22:45,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e96317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45, skipping insertion in model container [2022-01-31 23:22:45,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:22:45,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:22:45,428 WARN L230 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] [2022-01-31 23:22:45,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:22:45,458 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:22:45,471 WARN L230 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] [2022-01-31 23:22:45,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:22:45,495 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:22:45,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45 WrapperNode [2022-01-31 23:22:45,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:22:45,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:22:45,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:22:45,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:22:45,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:22:45,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:22:45,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:22:45,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:22:45,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (1/1) ... [2022-01-31 23:22:45,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:22:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:22:45,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 23:22:45,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 23:22:45,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:22:45,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:22:45,586 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:22:45,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:22:45,586 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2022-01-31 23:22:45,586 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2022-01-31 23:22:45,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:22:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:22:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:22:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 23:22:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 23:22:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:22:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:22:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:22:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2022-01-31 23:22:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-01-31 23:22:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-01-31 23:22:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-01-31 23:22:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2022-01-31 23:22:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2022-01-31 23:22:45,592 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2022-01-31 23:22:45,593 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2022-01-31 23:22:45,593 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2022-01-31 23:22:45,593 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2022-01-31 23:22:45,593 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2022-01-31 23:22:45,593 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:22:45,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:22:45,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:22:45,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:22:45,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:22:45,680 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:22:45,682 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:22:45,897 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:22:45,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:22:45,903 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 23:22:45,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:22:45 BoogieIcfgContainer [2022-01-31 23:22:45,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:22:45,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:22:45,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:22:45,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:22:45,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:22:45" (1/3) ... [2022-01-31 23:22:45,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423591f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:22:45, skipping insertion in model container [2022-01-31 23:22:45,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:22:45" (2/3) ... [2022-01-31 23:22:45,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423591f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:22:45, skipping insertion in model container [2022-01-31 23:22:45,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:22:45" (3/3) ... [2022-01-31 23:22:45,916 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2022-01-31 23:22:45,920 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:22:45,920 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:22:45,972 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:22:45,980 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=QVASR [2022-01-31 23:22:45,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:22:45,996 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) [2022-01-31 23:22:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 23:22:46,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:46,017 INFO L514 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] [2022-01-31 23:22:46,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:46,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1687048304, now seen corresponding path program 1 times [2022-01-31 23:22:46,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:46,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888881792] [2022-01-31 23:22:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:46,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:46,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 23:22:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:46,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888881792] [2022-01-31 23:22:46,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888881792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:46,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:46,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:22:46,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268162770] [2022-01-31 23:22:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:46,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:22:46,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:46,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:22:46,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:22:46,276 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) [2022-01-31 23:22:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:46,339 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2022-01-31 23:22:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:22:46,348 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 [2022-01-31 23:22:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:46,353 INFO L225 Difference]: With dead ends: 93 [2022-01-31 23:22:46,353 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 23:22:46,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:22:46,358 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 49 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:46,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 62 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:22:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 23:22:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 23:22:46,386 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) [2022-01-31 23:22:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-01-31 23:22:46,388 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2022-01-31 23:22:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:46,389 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-01-31 23:22:46,389 INFO L471 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) [2022-01-31 23:22:46,389 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-01-31 23:22:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:22:46,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:46,390 INFO L514 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] [2022-01-31 23:22:46,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:22:46,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:46,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1509330471, now seen corresponding path program 1 times [2022-01-31 23:22:46,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:46,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874227527] [2022-01-31 23:22:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:46,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:46,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:22:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:46,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:46,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874227527] [2022-01-31 23:22:46,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874227527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:46,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:46,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 23:22:46,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664132621] [2022-01-31 23:22:46,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:46,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 23:22:46,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:46,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 23:22:46,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 23:22:46,470 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) [2022-01-31 23:22:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:46,553 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-01-31 23:22:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 23:22:46,553 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 [2022-01-31 23:22:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:46,555 INFO L225 Difference]: With dead ends: 78 [2022-01-31 23:22:46,555 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 23:22:46,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 23:22:46,557 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:46,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 56 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:22:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 23:22:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 23:22:46,564 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) [2022-01-31 23:22:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-31 23:22:46,565 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2022-01-31 23:22:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:46,565 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-31 23:22:46,566 INFO L471 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) [2022-01-31 23:22:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-31 23:22:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:22:46,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:46,567 INFO L514 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] [2022-01-31 23:22:46,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:22:46,567 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1932032297, now seen corresponding path program 1 times [2022-01-31 23:22:46,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:46,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037186828] [2022-01-31 23:22:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:46,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:46,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:22:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:46,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:46,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037186828] [2022-01-31 23:22:46,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037186828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:46,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:46,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:22:46,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613386555] [2022-01-31 23:22:46,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:46,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:22:46,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:22:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:22:46,694 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) [2022-01-31 23:22:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:46,904 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2022-01-31 23:22:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 23:22:46,905 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 [2022-01-31 23:22:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:46,907 INFO L225 Difference]: With dead ends: 106 [2022-01-31 23:22:46,907 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 23:22:46,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:22:46,915 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 96 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:46,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 61 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:22:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 23:22:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2022-01-31 23:22:46,944 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) [2022-01-31 23:22:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-01-31 23:22:46,945 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 33 [2022-01-31 23:22:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:46,945 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-01-31 23:22:46,945 INFO L471 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) [2022-01-31 23:22:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-01-31 23:22:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:22:46,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:46,947 INFO L514 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] [2022-01-31 23:22:46,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:22:46,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1403704983, now seen corresponding path program 1 times [2022-01-31 23:22:46,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:46,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993528126] [2022-01-31 23:22:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:46,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:46,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:22:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:47,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:47,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993528126] [2022-01-31 23:22:47,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [993528126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:47,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:47,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:22:47,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194446878] [2022-01-31 23:22:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:47,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:22:47,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:22:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:22:47,139 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) [2022-01-31 23:22:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:47,501 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2022-01-31 23:22:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:22:47,502 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 [2022-01-31 23:22:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:47,506 INFO L225 Difference]: With dead ends: 106 [2022-01-31 23:22:47,506 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 23:22:47,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-31 23:22:47,515 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 187 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:47,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 68 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:22:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 23:22:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2022-01-31 23:22:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 73 states have internal predecessors, (95), 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) [2022-01-31 23:22:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-01-31 23:22:47,534 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 33 [2022-01-31 23:22:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:47,535 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-01-31 23:22:47,535 INFO L471 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) [2022-01-31 23:22:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-01-31 23:22:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 23:22:47,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:47,536 INFO L514 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] [2022-01-31 23:22:47,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:22:47,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash 590439723, now seen corresponding path program 1 times [2022-01-31 23:22:47,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:47,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226800662] [2022-01-31 23:22:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:47,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:47,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:22:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:47,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226800662] [2022-01-31 23:22:47,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226800662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:47,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:47,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 23:22:47,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607661422] [2022-01-31 23:22:47,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:47,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 23:22:47,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:47,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 23:22:47,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 23:22:47,688 INFO L87 Difference]: Start difference. First operand 84 states and 107 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) [2022-01-31 23:22:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:47,957 INFO L93 Difference]: Finished difference Result 195 states and 257 transitions. [2022-01-31 23:22:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:22:47,957 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 [2022-01-31 23:22:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:47,960 INFO L225 Difference]: With dead ends: 195 [2022-01-31 23:22:47,960 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 23:22:47,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:22:47,961 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:47,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 77 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:22:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 23:22:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2022-01-31 23:22:47,991 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) [2022-01-31 23:22:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2022-01-31 23:22:47,995 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 33 [2022-01-31 23:22:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:47,996 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2022-01-31 23:22:47,996 INFO L471 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) [2022-01-31 23:22:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2022-01-31 23:22:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 23:22:48,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:48,000 INFO L514 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] [2022-01-31 23:22:48,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:22:48,000 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash -532744798, now seen corresponding path program 1 times [2022-01-31 23:22:48,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:48,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024367958] [2022-01-31 23:22:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:48,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:48,003 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:48,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 23:22:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 23:22:48,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024367958] [2022-01-31 23:22:48,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024367958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:48,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:48,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 23:22:48,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834769866] [2022-01-31 23:22:48,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:48,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 23:22:48,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 23:22:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 23:22:48,085 INFO L87 Difference]: Start difference. First operand 91 states and 115 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) [2022-01-31 23:22:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:48,298 INFO L93 Difference]: Finished difference Result 180 states and 227 transitions. [2022-01-31 23:22:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:22:48,299 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 [2022-01-31 23:22:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:48,300 INFO L225 Difference]: With dead ends: 180 [2022-01-31 23:22:48,300 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 23:22:48,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:22:48,304 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 125 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:48,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 62 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:22:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 23:22:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2022-01-31 23:22:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 75 states have internal predecessors, (92), 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) [2022-01-31 23:22:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-01-31 23:22:48,328 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 35 [2022-01-31 23:22:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-01-31 23:22:48,328 INFO L471 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) [2022-01-31 23:22:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-01-31 23:22:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 23:22:48,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:48,333 INFO L514 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] [2022-01-31 23:22:48,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:22:48,333 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1949287377, now seen corresponding path program 1 times [2022-01-31 23:22:48,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:48,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633145695] [2022-01-31 23:22:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:48,353 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:493) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:426) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkEquivalence(SmtUtils.java:2374) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.areFormulasEquivalent(SmtUtils.java:2366) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrUtils.checkTermEquiv(QvasrUtils.java:211) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.simplifyRealMultiplication(QvasrAbstractor.java:720) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.gaussPartialPivot(QvasrAbstractor.java:196) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.gaussianSolve(QvasrAbstractor.java:132) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.computeAbstraction(QvasrAbstractor.java:111) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:133) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:79) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:210) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:185) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-31 23:22:48,359 INFO L158 Benchmark]: Toolchain (without parser) took 3092.81ms. Allocated memory was 175.1MB in the beginning and 210.8MB in the end (delta: 35.7MB). Free memory was 125.9MB in the beginning and 96.7MB in the end (delta: 29.3MB). Peak memory consumption was 64.7MB. Max. memory is 8.0GB. [2022-01-31 23:22:48,360 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:22:48,360 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.38ms. Allocated memory is still 175.1MB. Free memory was 125.8MB in the beginning and 150.2MB in the end (delta: -24.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-31 23:22:48,361 INFO L158 Benchmark]: Boogie Preprocessor took 31.32ms. Allocated memory is still 175.1MB. Free memory was 150.2MB in the beginning and 148.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 23:22:48,361 INFO L158 Benchmark]: RCFGBuilder took 376.64ms. Allocated memory is still 175.1MB. Free memory was 148.1MB in the beginning and 133.2MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-01-31 23:22:48,361 INFO L158 Benchmark]: TraceAbstraction took 2452.30ms. Allocated memory was 175.1MB in the beginning and 210.8MB in the end (delta: 35.7MB). Free memory was 132.4MB in the beginning and 96.7MB in the end (delta: 35.8MB). Peak memory consumption was 72.4MB. Max. memory is 8.0GB. [2022-01-31 23:22:48,362 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 224.38ms. Allocated memory is still 175.1MB. Free memory was 125.8MB in the beginning and 150.2MB in the end (delta: -24.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.32ms. Allocated memory is still 175.1MB. Free memory was 150.2MB in the beginning and 148.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 376.64ms. Allocated memory is still 175.1MB. Free memory was 148.1MB in the beginning and 133.2MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 2452.30ms. Allocated memory was 175.1MB in the beginning and 210.8MB in the end (delta: 35.7MB). Free memory was 132.4MB in the beginning and 96.7MB in the end (delta: 35.8MB). Peak memory consumption was 72.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:493) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-31 23:22:48,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...