/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:18:24,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:18:24,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:18:24,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:18:24,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:18:24,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:18:24,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:18:24,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:18:24,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:18:24,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:18:24,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:18:24,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:18:24,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:18:24,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:18:24,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:18:24,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:18:24,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:18:24,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:18:24,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:18:24,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:18:24,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:18:24,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:18:24,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:18:24,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:18:24,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 21:18:24,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 21:18:24,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 21:18:24,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 21:18:24,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 21:18:24,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 21:18:24,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 21:18:24,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 21:18:24,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 21:18:24,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 21:18:24,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 21:18:24,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 21:18:24,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 21:18:24,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 21:18:24,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:18:24,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:18:24,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:18:24,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:18:24,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:18:24,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:18:24,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:18:24,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:18:24,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:18:24,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:18:24,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:18:24,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:18:24,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:18:24,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:18:24,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:18:24,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:18:24,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:18:24,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:18:24,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:18:24,199 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:18:24,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:18:24,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:18:24,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:18:24,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:18:24,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:18:24,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:18:24,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:18:24,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:18:24,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:18:24,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:18:24,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:18:24,641 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:18:24,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-02-21 21:18:24,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec32e5707/f0574a9b3bc449419cedb086205e34e5/FLAG22c63619b [2021-02-21 21:18:25,386 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:18:25,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-02-21 21:18:25,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec32e5707/f0574a9b3bc449419cedb086205e34e5/FLAG22c63619b [2021-02-21 21:18:25,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec32e5707/f0574a9b3bc449419cedb086205e34e5 [2021-02-21 21:18:25,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:18:25,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:18:25,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:25,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:18:25,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:18:25,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:25" (1/1) ... [2021-02-21 21:18:25,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6a9e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:25, skipping insertion in model container [2021-02-21 21:18:25,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:25" (1/1) ... [2021-02-21 21:18:25,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:18:25,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:18:25,962 WARN L226 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] [2021-02-21 21:18:26,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:26,015 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:18:26,030 WARN L226 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] [2021-02-21 21:18:26,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:26,084 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:18:26,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26 WrapperNode [2021-02-21 21:18:26,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:26,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:18:26,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:18:26,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:18:26,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (1/1) ... [2021-02-21 21:18:26,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (1/1) ... [2021-02-21 21:18:26,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (1/1) ... [2021-02-21 21:18:26,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (1/1) ... [2021-02-21 21:18:26,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (1/1) ... [2021-02-21 21:18:26,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (1/1) ... [2021-02-21 21:18:26,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (1/1) ... [2021-02-21 21:18:26,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:18:26,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:18:26,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:18:26,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:18:26,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (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 [2021-02-21 21:18:26,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:18:26,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:18:26,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:18:26,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:18:26,338 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2021-02-21 21:18:26,338 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2021-02-21 21:18:26,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:18:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:18:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:18:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:18:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:18:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:18:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:18:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:18:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-02-21 21:18:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-02-21 21:18:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-02-21 21:18:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-02-21 21:18:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2021-02-21 21:18:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-02-21 21:18:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-02-21 21:18:26,341 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-02-21 21:18:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-02-21 21:18:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-02-21 21:18:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-02-21 21:18:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2021-02-21 21:18:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2021-02-21 21:18:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2021-02-21 21:18:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2021-02-21 21:18:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2021-02-21 21:18:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2021-02-21 21:18:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2021-02-21 21:18:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2021-02-21 21:18:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2021-02-21 21:18:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2021-02-21 21:18:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2021-02-21 21:18:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2021-02-21 21:18:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2021-02-21 21:18:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2021-02-21 21:18:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2021-02-21 21:18:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:18:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:18:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:18:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:18:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:18:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:18:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:18:26,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:18:26,974 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-21 21:18:26,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:26 BoogieIcfgContainer [2021-02-21 21:18:26,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:18:26,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:18:26,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:18:26,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:18:26,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:18:25" (1/3) ... [2021-02-21 21:18:26,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b386208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:26, skipping insertion in model container [2021-02-21 21:18:26,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:26" (2/3) ... [2021-02-21 21:18:27,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b386208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:27, skipping insertion in model container [2021-02-21 21:18:27,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:26" (3/3) ... [2021-02-21 21:18:27,006 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-02-21 21:18:27,023 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:18:27,029 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:18:27,048 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:18:27,078 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:18:27,078 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:18:27,078 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:18:27,079 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:18:27,079 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:18:27,079 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:18:27,079 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:18:27,079 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:18:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2021-02-21 21:18:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-21 21:18:27,119 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:27,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:27,120 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:27,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1777091402, now seen corresponding path program 1 times [2021-02-21 21:18:27,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:27,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233757330] [2021-02-21 21:18:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:27,243 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:27,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:27,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:27,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:27,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:27,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:27,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:27,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:27,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-02-21 21:18:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:27,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:27,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:27,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233757330] [2021-02-21 21:18:27,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:27,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:18:27,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102093629] [2021-02-21 21:18:27,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:18:27,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:18:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:27,532 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2021-02-21 21:18:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:27,820 INFO L93 Difference]: Finished difference Result 232 states and 262 transitions. [2021-02-21 21:18:27,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:18:27,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2021-02-21 21:18:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:27,833 INFO L225 Difference]: With dead ends: 232 [2021-02-21 21:18:27,833 INFO L226 Difference]: Without dead ends: 106 [2021-02-21 21:18:27,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-21 21:18:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-02-21 21:18:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-02-21 21:18:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-02-21 21:18:27,913 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 52 [2021-02-21 21:18:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:27,914 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-02-21 21:18:27,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:18:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-02-21 21:18:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-21 21:18:27,917 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:27,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:27,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:18:27,918 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:27,920 INFO L82 PathProgramCache]: Analyzing trace with hash 57162465, now seen corresponding path program 1 times [2021-02-21 21:18:27,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:27,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137345094] [2021-02-21 21:18:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:27,953 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:28,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:28,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-21 21:18:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:28,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:28,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137345094] [2021-02-21 21:18:28,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:28,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:18:28,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602504233] [2021-02-21 21:18:28,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:18:28,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:18:28,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:18:28,098 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 4 states. [2021-02-21 21:18:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:28,338 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2021-02-21 21:18:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:18:28,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2021-02-21 21:18:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:28,342 INFO L225 Difference]: With dead ends: 193 [2021-02-21 21:18:28,342 INFO L226 Difference]: Without dead ends: 107 [2021-02-21 21:18:28,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:18:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-21 21:18:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-02-21 21:18:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-02-21 21:18:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-02-21 21:18:28,365 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 64 [2021-02-21 21:18:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:28,366 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-02-21 21:18:28,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:18:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-02-21 21:18:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-21 21:18:28,369 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:28,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:28,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:18:28,370 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1846540770, now seen corresponding path program 1 times [2021-02-21 21:18:28,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:28,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889992907] [2021-02-21 21:18:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:28,375 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:28,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:28,548 WARN L141 QuantifierPusher]: treesize reduction 7, result has 56.3 percent of original size [2021-02-21 21:18:28,549 WARN L147 QuantifierPusher]: treesize reduction 7, result has 56.3 percent of original size 9 [2021-02-21 21:18:28,561 WARN L141 QuantifierPusher]: treesize reduction 6, result has 71.4 percent of original size [2021-02-21 21:18:28,563 WARN L147 QuantifierPusher]: treesize reduction 6, result has 71.4 percent of original size 15 [2021-02-21 21:18:28,588 WARN L141 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size [2021-02-21 21:18:28,589 WARN L147 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size 13 [2021-02-21 21:18:28,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:28,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:28,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:28,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-21 21:18:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:28,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:28,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:28,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889992907] [2021-02-21 21:18:28,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:28,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:18:28,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977046786] [2021-02-21 21:18:28,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:18:28,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:28,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:18:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:18:28,742 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 9 states. [2021-02-21 21:18:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:29,279 INFO L93 Difference]: Finished difference Result 212 states and 236 transitions. [2021-02-21 21:18:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 21:18:29,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2021-02-21 21:18:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:29,286 INFO L225 Difference]: With dead ends: 212 [2021-02-21 21:18:29,286 INFO L226 Difference]: Without dead ends: 210 [2021-02-21 21:18:29,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:18:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-21 21:18:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 167. [2021-02-21 21:18:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-02-21 21:18:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-02-21 21:18:29,333 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 66 [2021-02-21 21:18:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:29,335 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-02-21 21:18:29,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:18:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-02-21 21:18:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-21 21:18:29,345 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:29,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:29,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:18:29,346 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1494007365, now seen corresponding path program 1 times [2021-02-21 21:18:29,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:29,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666884660] [2021-02-21 21:18:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:29,353 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:29,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:29,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:29,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:18:29,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:18:29,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:29,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:29,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:29,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:29,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:29,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:29,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:29,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:29,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:29,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-02-21 21:18:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:29,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:29,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:29,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666884660] [2021-02-21 21:18:29,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:29,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:18:29,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28400921] [2021-02-21 21:18:29,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:18:29,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:29,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:18:29,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:18:29,663 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand 12 states. [2021-02-21 21:18:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:30,373 INFO L93 Difference]: Finished difference Result 452 states and 513 transitions. [2021-02-21 21:18:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:18:30,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2021-02-21 21:18:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:30,379 INFO L225 Difference]: With dead ends: 452 [2021-02-21 21:18:30,379 INFO L226 Difference]: Without dead ends: 362 [2021-02-21 21:18:30,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:18:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-02-21 21:18:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 207. [2021-02-21 21:18:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-21 21:18:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2021-02-21 21:18:30,410 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 69 [2021-02-21 21:18:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:30,411 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2021-02-21 21:18:30,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:18:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2021-02-21 21:18:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-21 21:18:30,413 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:30,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:30,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:18:30,413 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1869971361, now seen corresponding path program 1 times [2021-02-21 21:18:30,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:30,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105358516] [2021-02-21 21:18:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:30,417 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:30,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 21:18:30,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:30,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-02-21 21:18:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:30,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:30,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105358516] [2021-02-21 21:18:30,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:30,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:18:30,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214632557] [2021-02-21 21:18:30,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:18:30,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:30,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:18:30,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:18:30,530 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand 4 states. [2021-02-21 21:18:30,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:30,846 INFO L93 Difference]: Finished difference Result 297 states and 336 transitions. [2021-02-21 21:18:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:18:30,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2021-02-21 21:18:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:30,849 INFO L225 Difference]: With dead ends: 297 [2021-02-21 21:18:30,849 INFO L226 Difference]: Without dead ends: 209 [2021-02-21 21:18:30,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:18:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-21 21:18:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-02-21 21:18:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-02-21 21:18:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2021-02-21 21:18:30,872 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 69 [2021-02-21 21:18:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:30,872 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2021-02-21 21:18:30,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:18:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2021-02-21 21:18:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-21 21:18:30,874 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:30,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:30,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:18:30,875 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -762357340, now seen corresponding path program 1 times [2021-02-21 21:18:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:30,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814107919] [2021-02-21 21:18:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:30,879 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:30,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:30,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-02-21 21:18:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:30,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:30,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:30,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814107919] [2021-02-21 21:18:30,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:30,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:18:30,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357127134] [2021-02-21 21:18:30,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:18:30,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:18:30,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:18:30,976 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand 5 states. [2021-02-21 21:18:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:31,261 INFO L93 Difference]: Finished difference Result 318 states and 357 transitions. [2021-02-21 21:18:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:18:31,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2021-02-21 21:18:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:31,264 INFO L225 Difference]: With dead ends: 318 [2021-02-21 21:18:31,264 INFO L226 Difference]: Without dead ends: 221 [2021-02-21 21:18:31,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:18:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-02-21 21:18:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-02-21 21:18:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-02-21 21:18:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 240 transitions. [2021-02-21 21:18:31,292 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 240 transitions. Word has length 70 [2021-02-21 21:18:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:31,293 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 240 transitions. [2021-02-21 21:18:31,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:18:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 240 transitions. [2021-02-21 21:18:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-21 21:18:31,294 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:31,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:31,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:18:31,295 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash 220442596, now seen corresponding path program 1 times [2021-02-21 21:18:31,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:31,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998403364] [2021-02-21 21:18:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:31,304 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:31,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:31,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 21:18:31,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-02-21 21:18:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:31,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998403364] [2021-02-21 21:18:31,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:31,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:18:31,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215472417] [2021-02-21 21:18:31,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:18:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:31,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:18:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:18:31,411 INFO L87 Difference]: Start difference. First operand 213 states and 240 transitions. Second operand 6 states. [2021-02-21 21:18:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:31,738 INFO L93 Difference]: Finished difference Result 386 states and 432 transitions. [2021-02-21 21:18:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:18:31,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2021-02-21 21:18:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:31,742 INFO L225 Difference]: With dead ends: 386 [2021-02-21 21:18:31,742 INFO L226 Difference]: Without dead ends: 274 [2021-02-21 21:18:31,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:18:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-02-21 21:18:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 217. [2021-02-21 21:18:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-02-21 21:18:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2021-02-21 21:18:31,765 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 71 [2021-02-21 21:18:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:31,765 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2021-02-21 21:18:31,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:18:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2021-02-21 21:18:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-02-21 21:18:31,767 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:31,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:31,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:18:31,767 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash -767764281, now seen corresponding path program 1 times [2021-02-21 21:18:31,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:31,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632013291] [2021-02-21 21:18:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:31,771 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,799 WARN L141 QuantifierPusher]: treesize reduction 1, result has 85.7 percent of original size [2021-02-21 21:18:31,800 WARN L147 QuantifierPusher]: treesize reduction 1, result has 85.7 percent of original size 6 [2021-02-21 21:18:31,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:31,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-21 21:18:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:31,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:31,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:31,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632013291] [2021-02-21 21:18:31,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:31,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:18:31,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021060530] [2021-02-21 21:18:31,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:18:31,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:31,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:18:31,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:18:31,881 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand 6 states. [2021-02-21 21:18:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:32,269 INFO L93 Difference]: Finished difference Result 358 states and 400 transitions. [2021-02-21 21:18:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:18:32,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2021-02-21 21:18:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:32,275 INFO L225 Difference]: With dead ends: 358 [2021-02-21 21:18:32,276 INFO L226 Difference]: Without dead ends: 261 [2021-02-21 21:18:32,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:18:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-02-21 21:18:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 217. [2021-02-21 21:18:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-02-21 21:18:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2021-02-21 21:18:32,307 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 72 [2021-02-21 21:18:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:32,308 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2021-02-21 21:18:32,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:18:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2021-02-21 21:18:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-02-21 21:18:32,309 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:32,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:32,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:18:32,310 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1330822876, now seen corresponding path program 1 times [2021-02-21 21:18:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:32,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358401063] [2021-02-21 21:18:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:32,314 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:32,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:32,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:32,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:32,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:32,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:32,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 21:18:32,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:32,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:32,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:32,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-02-21 21:18:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:32,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:32,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:32,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358401063] [2021-02-21 21:18:32,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:32,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:18:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954747344] [2021-02-21 21:18:32,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:18:32,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:18:32,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:18:32,426 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand 8 states. [2021-02-21 21:18:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:32,971 INFO L93 Difference]: Finished difference Result 460 states and 514 transitions. [2021-02-21 21:18:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 21:18:32,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2021-02-21 21:18:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:32,977 INFO L225 Difference]: With dead ends: 460 [2021-02-21 21:18:32,977 INFO L226 Difference]: Without dead ends: 303 [2021-02-21 21:18:32,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:18:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-21 21:18:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 224. [2021-02-21 21:18:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-02-21 21:18:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2021-02-21 21:18:33,013 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 74 [2021-02-21 21:18:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:33,014 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2021-02-21 21:18:33,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:18:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2021-02-21 21:18:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-02-21 21:18:33,019 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:33,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:33,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:18:33,020 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:33,024 INFO L82 PathProgramCache]: Analyzing trace with hash -448602513, now seen corresponding path program 1 times [2021-02-21 21:18:33,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:33,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851702952] [2021-02-21 21:18:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:33,076 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:33,080 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:33,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:33,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:33,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:33,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:33,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:33,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:33,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:33,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:33,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:33,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:33,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:33,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-02-21 21:18:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:33,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:33,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:33,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851702952] [2021-02-21 21:18:33,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:33,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:18:33,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110563736] [2021-02-21 21:18:33,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:18:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:18:33,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:18:33,292 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 10 states. [2021-02-21 21:18:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:33,981 INFO L93 Difference]: Finished difference Result 457 states and 502 transitions. [2021-02-21 21:18:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:18:33,982 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2021-02-21 21:18:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:33,984 INFO L225 Difference]: With dead ends: 457 [2021-02-21 21:18:33,984 INFO L226 Difference]: Without dead ends: 345 [2021-02-21 21:18:33,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:18:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-02-21 21:18:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 280. [2021-02-21 21:18:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2021-02-21 21:18:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 309 transitions. [2021-02-21 21:18:34,034 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 309 transitions. Word has length 76 [2021-02-21 21:18:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:34,034 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 309 transitions. [2021-02-21 21:18:34,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:18:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 309 transitions. [2021-02-21 21:18:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-02-21 21:18:34,036 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:34,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:34,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:18:34,036 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash -825247660, now seen corresponding path program 1 times [2021-02-21 21:18:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:34,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176248965] [2021-02-21 21:18:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:34,043 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:34,045 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:34,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:34,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:34,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:18:34,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:18:34,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:34,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:34,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:34,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:34,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:34,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:34,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:34,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:34,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:34,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:34,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-21 21:18:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:34,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:34,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:34,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176248965] [2021-02-21 21:18:34,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:34,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:18:34,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461004170] [2021-02-21 21:18:34,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:18:34,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:34,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:18:34,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:18:34,252 INFO L87 Difference]: Start difference. First operand 280 states and 309 transitions. Second operand 14 states. [2021-02-21 21:18:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:34,994 INFO L93 Difference]: Finished difference Result 456 states and 498 transitions. [2021-02-21 21:18:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:18:34,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2021-02-21 21:18:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:34,997 INFO L225 Difference]: With dead ends: 456 [2021-02-21 21:18:34,997 INFO L226 Difference]: Without dead ends: 336 [2021-02-21 21:18:34,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-02-21 21:18:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-02-21 21:18:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 274. [2021-02-21 21:18:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2021-02-21 21:18:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 302 transitions. [2021-02-21 21:18:35,029 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 302 transitions. Word has length 79 [2021-02-21 21:18:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:35,029 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 302 transitions. [2021-02-21 21:18:35,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:18:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 302 transitions. [2021-02-21 21:18:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-21 21:18:35,031 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:35,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:35,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 21:18:35,032 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2146927954, now seen corresponding path program 1 times [2021-02-21 21:18:35,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:35,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75586020] [2021-02-21 21:18:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:35,040 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:35,042 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:35,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:35,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:35,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:35,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:35,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:35,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:35,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:35,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-02-21 21:18:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:35,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:35,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75586020] [2021-02-21 21:18:35,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:35,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:18:35,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138013722] [2021-02-21 21:18:35,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:18:35,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:18:35,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:18:35,187 INFO L87 Difference]: Start difference. First operand 274 states and 302 transitions. Second operand 10 states. [2021-02-21 21:18:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:35,800 INFO L93 Difference]: Finished difference Result 449 states and 494 transitions. [2021-02-21 21:18:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:18:35,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2021-02-21 21:18:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:35,807 INFO L225 Difference]: With dead ends: 449 [2021-02-21 21:18:35,807 INFO L226 Difference]: Without dead ends: 341 [2021-02-21 21:18:35,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:18:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-02-21 21:18:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 278. [2021-02-21 21:18:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2021-02-21 21:18:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 306 transitions. [2021-02-21 21:18:35,852 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 306 transitions. Word has length 80 [2021-02-21 21:18:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:35,852 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 306 transitions. [2021-02-21 21:18:35,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:18:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 306 transitions. [2021-02-21 21:18:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-21 21:18:35,854 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:35,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:35,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 21:18:35,855 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:35,855 INFO L82 PathProgramCache]: Analyzing trace with hash -157951433, now seen corresponding path program 1 times [2021-02-21 21:18:35,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:35,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710060984] [2021-02-21 21:18:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:35,880 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:35,882 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:35,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:35,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:35,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:35,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:35,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 21:18:35,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:35,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:36,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:36,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:36,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-21 21:18:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:36,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:36,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710060984] [2021-02-21 21:18:36,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:36,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:18:36,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254023890] [2021-02-21 21:18:36,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:18:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:36,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:18:36,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:18:36,050 INFO L87 Difference]: Start difference. First operand 278 states and 306 transitions. Second operand 10 states. [2021-02-21 21:18:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:36,644 INFO L93 Difference]: Finished difference Result 627 states and 694 transitions. [2021-02-21 21:18:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:18:36,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2021-02-21 21:18:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:36,649 INFO L225 Difference]: With dead ends: 627 [2021-02-21 21:18:36,649 INFO L226 Difference]: Without dead ends: 468 [2021-02-21 21:18:36,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-02-21 21:18:36,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-02-21 21:18:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 389. [2021-02-21 21:18:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2021-02-21 21:18:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 430 transitions. [2021-02-21 21:18:36,696 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 430 transitions. Word has length 85 [2021-02-21 21:18:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:36,697 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 430 transitions. [2021-02-21 21:18:36,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:18:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 430 transitions. [2021-02-21 21:18:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-21 21:18:36,699 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:36,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:36,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 21:18:36,700 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:36,700 INFO L82 PathProgramCache]: Analyzing trace with hash -851163776, now seen corresponding path program 2 times [2021-02-21 21:18:36,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:36,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420729107] [2021-02-21 21:18:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:36,710 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:36,711 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:36,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:36,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:36,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:36,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:36,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:36,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:36,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:36,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:36,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:36,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:36,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:36,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:36,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:36,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:36,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-02-21 21:18:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:36,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:36,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420729107] [2021-02-21 21:18:36,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:36,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:18:36,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239362959] [2021-02-21 21:18:36,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:18:36,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:36,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:18:36,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:18:36,909 INFO L87 Difference]: Start difference. First operand 389 states and 430 transitions. Second operand 12 states. [2021-02-21 21:18:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:37,790 INFO L93 Difference]: Finished difference Result 730 states and 805 transitions. [2021-02-21 21:18:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 21:18:37,791 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2021-02-21 21:18:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:37,796 INFO L225 Difference]: With dead ends: 730 [2021-02-21 21:18:37,797 INFO L226 Difference]: Without dead ends: 561 [2021-02-21 21:18:37,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-21 21:18:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-02-21 21:18:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 388. [2021-02-21 21:18:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2021-02-21 21:18:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 428 transitions. [2021-02-21 21:18:37,845 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 428 transitions. Word has length 86 [2021-02-21 21:18:37,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:37,846 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 428 transitions. [2021-02-21 21:18:37,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:18:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 428 transitions. [2021-02-21 21:18:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-21 21:18:37,848 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:37,848 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:37,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 21:18:37,848 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:37,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1979143261, now seen corresponding path program 2 times [2021-02-21 21:18:37,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:37,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285414795] [2021-02-21 21:18:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:37,858 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:37,860 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:37,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:37,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:37,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:37,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:37,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:37,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:18:37,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:37,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:18:37,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:37,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:37,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:37,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:37,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:37,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:38,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:38,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:38,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:38,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:38,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:38,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:38,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:38,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:38,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:38,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:38,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-02-21 21:18:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:38,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:38,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:38,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285414795] [2021-02-21 21:18:38,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:38,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:18:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949304583] [2021-02-21 21:18:38,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:18:38,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:18:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:18:38,166 INFO L87 Difference]: Start difference. First operand 388 states and 428 transitions. Second operand 16 states. [2021-02-21 21:18:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:38,990 INFO L93 Difference]: Finished difference Result 571 states and 626 transitions. [2021-02-21 21:18:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 21:18:38,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2021-02-21 21:18:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:38,994 INFO L225 Difference]: With dead ends: 571 [2021-02-21 21:18:38,994 INFO L226 Difference]: Without dead ends: 378 [2021-02-21 21:18:38,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-02-21 21:18:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-02-21 21:18:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 337. [2021-02-21 21:18:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2021-02-21 21:18:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 370 transitions. [2021-02-21 21:18:39,028 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 370 transitions. Word has length 89 [2021-02-21 21:18:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:39,029 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 370 transitions. [2021-02-21 21:18:39,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:18:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 370 transitions. [2021-02-21 21:18:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-21 21:18:39,031 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:39,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:39,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 21:18:39,031 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 801821473, now seen corresponding path program 1 times [2021-02-21 21:18:39,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:39,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248595858] [2021-02-21 21:18:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:39,041 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:39,043 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:39,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:39,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:39,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:39,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:39,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:39,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:39,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:18:39,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:18:39,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 21:18:39,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:39,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:18:39,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:39,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:39,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:39,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-02-21 21:18:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:39,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:39,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248595858] [2021-02-21 21:18:39,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:39,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:18:39,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826883105] [2021-02-21 21:18:39,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:18:39,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:18:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:18:39,230 INFO L87 Difference]: Start difference. First operand 337 states and 370 transitions. Second operand 12 states. [2021-02-21 21:18:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:40,043 INFO L93 Difference]: Finished difference Result 609 states and 669 transitions. [2021-02-21 21:18:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 21:18:40,044 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2021-02-21 21:18:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:40,047 INFO L225 Difference]: With dead ends: 609 [2021-02-21 21:18:40,048 INFO L226 Difference]: Without dead ends: 489 [2021-02-21 21:18:40,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-21 21:18:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-02-21 21:18:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 367. [2021-02-21 21:18:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2021-02-21 21:18:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 404 transitions. [2021-02-21 21:18:40,096 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 404 transitions. Word has length 90 [2021-02-21 21:18:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:40,096 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 404 transitions. [2021-02-21 21:18:40,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:18:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 404 transitions. [2021-02-21 21:18:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-21 21:18:40,099 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:40,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:40,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 21:18:40,100 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:40,101 INFO L82 PathProgramCache]: Analyzing trace with hash 766699332, now seen corresponding path program 2 times [2021-02-21 21:18:40,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:40,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408240924] [2021-02-21 21:18:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:40,111 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:18:40,113 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:18:40,130 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:18:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:18:40,146 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:18:40,189 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:18:40,189 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:18:40,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-21 21:18:40,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:18:40 BoogieIcfgContainer [2021-02-21 21:18:40,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:18:40,213 INFO L168 Benchmark]: Toolchain (without parser) took 14476.65 ms. Allocated memory was 173.0 MB in the beginning and 310.4 MB in the end (delta: 137.4 MB). Free memory was 149.6 MB in the beginning and 144.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 143.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:40,213 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 173.0 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:18:40,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.27 ms. Allocated memory is still 173.0 MB. Free memory was 148.6 MB in the beginning and 137.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:40,214 INFO L168 Benchmark]: Boogie Preprocessor took 112.01 ms. Allocated memory is still 173.0 MB. Free memory was 137.0 MB in the beginning and 134.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:40,214 INFO L168 Benchmark]: RCFGBuilder took 779.06 ms. Allocated memory is still 173.0 MB. Free memory was 134.9 MB in the beginning and 148.9 MB in the end (delta: -14.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:40,214 INFO L168 Benchmark]: TraceAbstraction took 13227.35 ms. Allocated memory was 173.0 MB in the beginning and 310.4 MB in the end (delta: 137.4 MB). Free memory was 148.4 MB in the beginning and 144.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 142.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:40,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 173.0 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.27 ms. Allocated memory is still 173.0 MB. Free memory was 148.6 MB in the beginning and 137.0 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 112.01 ms. Allocated memory is still 173.0 MB. Free memory was 137.0 MB in the beginning and 134.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 779.06 ms. Allocated memory is still 173.0 MB. Free memory was 134.9 MB in the beginning and 148.9 MB in the end (delta: -14.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13227.35 ms. Allocated memory was 173.0 MB in the beginning and 310.4 MB in the end (delta: 137.4 MB). Free memory was 148.4 MB in the beginning and 144.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 142.6 MB. Max. memory is 8.0 GB. * 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 [L87] CALL parse_expression_list (A) [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; [L61] COND FALSE !(!str) [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j [L72] CALL r_strncpy(str2, str+start, j-start+1) [L41] return strncpy(dest,src,n); [L72] RET r_strncpy(str2, str+start, j-start+1) [L73] CALL __VERIFIER_assert(j - start + 1 < 2) [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.1s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2157 SDtfs, 2785 SDslu, 8608 SDs, 0 SdLazy, 5390 SolverSat, 262 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=389occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 16 MinimizatonAttempts, 991 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...