/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -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-36cd7be [2021-02-24 00:17:12,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:17:12,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:17:13,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 00:17:13,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 00:17:13,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 00:17:13,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 00:17:13,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 00:17:13,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 00:17:13,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 00:17:13,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 00:17:13,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 00:17:13,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:17:13,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:17:13,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:17:13,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:17:13,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:17:13,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:17:13,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:17:13,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:17:13,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:17:13,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:17:13,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:17:13,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:17:13,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:17:13,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 00:17:13,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 00:17:13,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 00:17:13,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:17:13,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:17:13,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:17:13,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:17:13,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:17:13,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:17:13,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:17:13,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:17:13,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:17:13,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:17:13,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:17:13,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:17:13,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:17:13,131 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:17:13,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:17:13,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:17:13,132 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:17:13,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:17:13,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:17:13,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:17:13,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:17:13,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:17:13,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:17:13,149 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:17:13,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:17:13,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:17:13,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:17:13,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:17:13,564 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:17:13,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-02-24 00:17:13,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72496adaf/e43fc4c5fc54438caa07f6f8ab344efe/FLAG090bee900 [2021-02-24 00:17:14,375 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:17:14,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-02-24 00:17:14,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72496adaf/e43fc4c5fc54438caa07f6f8ab344efe/FLAG090bee900 [2021-02-24 00:17:14,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72496adaf/e43fc4c5fc54438caa07f6f8ab344efe [2021-02-24 00:17:14,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:17:14,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:17:14,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:14,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:17:14,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:17:14,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:14" (1/1) ... [2021-02-24 00:17:14,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a084ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:14, skipping insertion in model container [2021-02-24 00:17:14,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:17:14" (1/1) ... [2021-02-24 00:17:14,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:17:14,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:14,929 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] [2021-02-24 00:17:14,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:14,996 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:15,011 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] [2021-02-24 00:17:15,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:15,057 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:15,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15 WrapperNode [2021-02-24 00:17:15,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:15,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:15,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:15,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:15,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (1/1) ... [2021-02-24 00:17:15,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (1/1) ... [2021-02-24 00:17:15,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (1/1) ... [2021-02-24 00:17:15,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (1/1) ... [2021-02-24 00:17:15,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (1/1) ... [2021-02-24 00:17:15,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (1/1) ... [2021-02-24 00:17:15,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (1/1) ... [2021-02-24 00:17:15,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:15,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:15,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:15,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:15,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (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 [2021-02-24 00:17:15,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:15,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2021-02-24 00:17:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2021-02-24 00:17:15,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:17:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:17:15,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-02-24 00:17:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-02-24 00:17:15,235 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-02-24 00:17:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-02-24 00:17:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2021-02-24 00:17:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-02-24 00:17:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-02-24 00:17:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-02-24 00:17:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-02-24 00:17:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-02-24 00:17:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-02-24 00:17:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2021-02-24 00:17:15,237 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2021-02-24 00:17:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2021-02-24 00:17:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2021-02-24 00:17:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2021-02-24 00:17:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2021-02-24 00:17:15,238 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2021-02-24 00:17:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2021-02-24 00:17:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2021-02-24 00:17:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2021-02-24 00:17:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2021-02-24 00:17:15,239 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2021-02-24 00:17:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2021-02-24 00:17:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2021-02-24 00:17:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2021-02-24 00:17:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:15,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:15,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:15,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:15,812 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 00:17:15,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:15 BoogieIcfgContainer [2021-02-24 00:17:15,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:15,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:15,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:15,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:15,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:17:14" (1/3) ... [2021-02-24 00:17:15,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25dfbc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:15, skipping insertion in model container [2021-02-24 00:17:15,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:15" (2/3) ... [2021-02-24 00:17:15,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25dfbc6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:15, skipping insertion in model container [2021-02-24 00:17:15,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:15" (3/3) ... [2021-02-24 00:17:15,824 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-02-24 00:17:15,830 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:15,835 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:15,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:15,875 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:15,875 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:15,875 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:15,875 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:15,876 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:15,876 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:15,876 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:15,876 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2021-02-24 00:17:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-24 00:17:15,909 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:15,910 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] [2021-02-24 00:17:15,911 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:15,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1777091402, now seen corresponding path program 1 times [2021-02-24 00:17:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798174056] [2021-02-24 00:17:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:16,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:16,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-02-24 00:17:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:16,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:16,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798174056] [2021-02-24 00:17:16,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:16,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:17:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281780719] [2021-02-24 00:17:16,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:17:16,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:16,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:17:16,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:16,267 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2021-02-24 00:17:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:16,562 INFO L93 Difference]: Finished difference Result 232 states and 262 transitions. [2021-02-24 00:17:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:17:16,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2021-02-24 00:17:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:16,592 INFO L225 Difference]: With dead ends: 232 [2021-02-24 00:17:16,592 INFO L226 Difference]: Without dead ends: 106 [2021-02-24 00:17:16,597 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 [2021-02-24 00:17:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-24 00:17:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-02-24 00:17:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-02-24 00:17:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-02-24 00:17:16,663 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 52 [2021-02-24 00:17:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:16,664 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-02-24 00:17:16,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:17:16,664 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-02-24 00:17:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-24 00:17:16,668 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:16,668 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] [2021-02-24 00:17:16,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:16,669 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:16,670 INFO L82 PathProgramCache]: Analyzing trace with hash 57162465, now seen corresponding path program 1 times [2021-02-24 00:17:16,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:16,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555345939] [2021-02-24 00:17:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:16,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:16,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-24 00:17:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:16,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:16,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:16,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555345939] [2021-02-24 00:17:16,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:16,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 00:17:16,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196728874] [2021-02-24 00:17:16,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 00:17:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 00:17:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 00:17:16,877 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 4 states. [2021-02-24 00:17:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:17,172 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2021-02-24 00:17:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 00:17:17,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2021-02-24 00:17:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:17,176 INFO L225 Difference]: With dead ends: 193 [2021-02-24 00:17:17,177 INFO L226 Difference]: Without dead ends: 107 [2021-02-24 00:17:17,180 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 [2021-02-24 00:17:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-24 00:17:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-02-24 00:17:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-02-24 00:17:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-02-24 00:17:17,219 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 64 [2021-02-24 00:17:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:17,221 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-02-24 00:17:17,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 00:17:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-02-24 00:17:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-24 00:17:17,226 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:17,226 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] [2021-02-24 00:17:17,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:17,227 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1846540770, now seen corresponding path program 1 times [2021-02-24 00:17:17,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:17,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634005734] [2021-02-24 00:17:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:17,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:17,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:17,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:17,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:17,475 WARN L141 QuantifierPusher]: treesize reduction 7, result has 56.3 percent of original size [2021-02-24 00:17:17,476 WARN L147 QuantifierPusher]: treesize reduction 7, result has 56.3 percent of original size 9 [2021-02-24 00:17:17,486 WARN L141 QuantifierPusher]: treesize reduction 6, result has 71.4 percent of original size [2021-02-24 00:17:17,488 WARN L147 QuantifierPusher]: treesize reduction 6, result has 71.4 percent of original size 15 [2021-02-24 00:17:17,511 WARN L141 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size [2021-02-24 00:17:17,512 WARN L147 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size 13 [2021-02-24 00:17:17,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:17,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:17,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:17,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:17,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:17,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:17,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:17,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:17,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:17,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-24 00:17:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:17,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:17,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:17,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634005734] [2021-02-24 00:17:17,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:17,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 00:17:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336120296] [2021-02-24 00:17:17,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:17:17,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:17,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:17:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:17:17,597 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 9 states. [2021-02-24 00:17:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:18,096 INFO L93 Difference]: Finished difference Result 212 states and 236 transitions. [2021-02-24 00:17:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:17:18,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2021-02-24 00:17:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:18,101 INFO L225 Difference]: With dead ends: 212 [2021-02-24 00:17:18,101 INFO L226 Difference]: Without dead ends: 210 [2021-02-24 00:17:18,102 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 [2021-02-24 00:17:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-24 00:17:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 167. [2021-02-24 00:17:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-02-24 00:17:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-02-24 00:17:18,137 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 66 [2021-02-24 00:17:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:18,139 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-02-24 00:17:18,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:17:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-02-24 00:17:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-24 00:17:18,144 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:18,145 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] [2021-02-24 00:17:18,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:17:18,145 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:18,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1494007365, now seen corresponding path program 1 times [2021-02-24 00:17:18,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:18,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136583414] [2021-02-24 00:17:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:18,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:18,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:18,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:17:18,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:17:18,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:18,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:18,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:18,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:18,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:18,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:18,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:18,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:18,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:18,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-02-24 00:17:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:18,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:18,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:18,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136583414] [2021-02-24 00:17:18,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:18,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-24 00:17:18,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003549838] [2021-02-24 00:17:18,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:17:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:17:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:17:18,329 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand 12 states. [2021-02-24 00:17:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:18,976 INFO L93 Difference]: Finished difference Result 452 states and 513 transitions. [2021-02-24 00:17:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-24 00:17:18,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2021-02-24 00:17:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:18,981 INFO L225 Difference]: With dead ends: 452 [2021-02-24 00:17:18,981 INFO L226 Difference]: Without dead ends: 362 [2021-02-24 00:17:18,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:17:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-02-24 00:17:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 207. [2021-02-24 00:17:19,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-24 00:17:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2021-02-24 00:17:19,011 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 69 [2021-02-24 00:17:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:19,011 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2021-02-24 00:17:19,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:17:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2021-02-24 00:17:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-24 00:17:19,013 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:19,013 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] [2021-02-24 00:17:19,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:17:19,014 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1869971361, now seen corresponding path program 1 times [2021-02-24 00:17:19,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:19,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748714783] [2021-02-24 00:17:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 00:17:19,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-02-24 00:17:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:19,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748714783] [2021-02-24 00:17:19,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:19,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 00:17:19,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534094702] [2021-02-24 00:17:19,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 00:17:19,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 00:17:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 00:17:19,101 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand 4 states. [2021-02-24 00:17:19,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:19,317 INFO L93 Difference]: Finished difference Result 297 states and 336 transitions. [2021-02-24 00:17:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 00:17:19,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2021-02-24 00:17:19,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:19,320 INFO L225 Difference]: With dead ends: 297 [2021-02-24 00:17:19,320 INFO L226 Difference]: Without dead ends: 209 [2021-02-24 00:17:19,321 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 [2021-02-24 00:17:19,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-24 00:17:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-02-24 00:17:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-02-24 00:17:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2021-02-24 00:17:19,340 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 69 [2021-02-24 00:17:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:19,340 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2021-02-24 00:17:19,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 00:17:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2021-02-24 00:17:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-24 00:17:19,342 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:19,342 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] [2021-02-24 00:17:19,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:17:19,343 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash -762357340, now seen corresponding path program 1 times [2021-02-24 00:17:19,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:19,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997226152] [2021-02-24 00:17:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-02-24 00:17:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:19,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997226152] [2021-02-24 00:17:19,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:19,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:17:19,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287211402] [2021-02-24 00:17:19,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:17:19,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:17:19,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:17:19,421 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand 5 states. [2021-02-24 00:17:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:19,646 INFO L93 Difference]: Finished difference Result 318 states and 357 transitions. [2021-02-24 00:17:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:17:19,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2021-02-24 00:17:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:19,649 INFO L225 Difference]: With dead ends: 318 [2021-02-24 00:17:19,649 INFO L226 Difference]: Without dead ends: 221 [2021-02-24 00:17:19,650 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 [2021-02-24 00:17:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-02-24 00:17:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-02-24 00:17:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-02-24 00:17:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 240 transitions. [2021-02-24 00:17:19,669 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 240 transitions. Word has length 70 [2021-02-24 00:17:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:19,669 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 240 transitions. [2021-02-24 00:17:19,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:17:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 240 transitions. [2021-02-24 00:17:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-24 00:17:19,671 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:19,671 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] [2021-02-24 00:17:19,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:17:19,672 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash 220442596, now seen corresponding path program 1 times [2021-02-24 00:17:19,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:19,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571035196] [2021-02-24 00:17:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:19,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:19,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 00:17:19,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-02-24 00:17:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:19,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:19,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:19,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571035196] [2021-02-24 00:17:19,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:19,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:17:19,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953141343] [2021-02-24 00:17:19,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:19,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:19,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:19,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:19,754 INFO L87 Difference]: Start difference. First operand 213 states and 240 transitions. Second operand 6 states. [2021-02-24 00:17:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:20,078 INFO L93 Difference]: Finished difference Result 386 states and 432 transitions. [2021-02-24 00:17:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:17:20,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2021-02-24 00:17:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:20,081 INFO L225 Difference]: With dead ends: 386 [2021-02-24 00:17:20,081 INFO L226 Difference]: Without dead ends: 274 [2021-02-24 00:17:20,082 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 [2021-02-24 00:17:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-02-24 00:17:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 217. [2021-02-24 00:17:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-02-24 00:17:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2021-02-24 00:17:20,107 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 71 [2021-02-24 00:17:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:20,108 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2021-02-24 00:17:20,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2021-02-24 00:17:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-02-24 00:17:20,110 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:20,110 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] [2021-02-24 00:17:20,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:17:20,110 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash -767764281, now seen corresponding path program 1 times [2021-02-24 00:17:20,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:20,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564280272] [2021-02-24 00:17:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:20,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,142 WARN L141 QuantifierPusher]: treesize reduction 1, result has 85.7 percent of original size [2021-02-24 00:17:20,143 WARN L147 QuantifierPusher]: treesize reduction 1, result has 85.7 percent of original size 6 [2021-02-24 00:17:20,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:20,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:20,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:17:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:20,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:20,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564280272] [2021-02-24 00:17:20,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:20,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:17:20,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692034477] [2021-02-24 00:17:20,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:20,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:20,210 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand 6 states. [2021-02-24 00:17:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:20,545 INFO L93 Difference]: Finished difference Result 358 states and 400 transitions. [2021-02-24 00:17:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:17:20,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2021-02-24 00:17:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:20,548 INFO L225 Difference]: With dead ends: 358 [2021-02-24 00:17:20,548 INFO L226 Difference]: Without dead ends: 261 [2021-02-24 00:17:20,549 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 [2021-02-24 00:17:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-02-24 00:17:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 217. [2021-02-24 00:17:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-02-24 00:17:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2021-02-24 00:17:20,573 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 72 [2021-02-24 00:17:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:20,573 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2021-02-24 00:17:20,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2021-02-24 00:17:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-02-24 00:17:20,574 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:20,575 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] [2021-02-24 00:17:20,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 00:17:20,575 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:20,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1330822876, now seen corresponding path program 1 times [2021-02-24 00:17:20,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:20,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363710053] [2021-02-24 00:17:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:20,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:20,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:20,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:20,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:20,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 00:17:20,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:20,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-02-24 00:17:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:20,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:20,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:20,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363710053] [2021-02-24 00:17:20,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:20,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 00:17:20,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18889744] [2021-02-24 00:17:20,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 00:17:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 00:17:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-24 00:17:20,680 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand 8 states. [2021-02-24 00:17:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:21,155 INFO L93 Difference]: Finished difference Result 460 states and 514 transitions. [2021-02-24 00:17:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 00:17:21,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2021-02-24 00:17:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:21,158 INFO L225 Difference]: With dead ends: 460 [2021-02-24 00:17:21,159 INFO L226 Difference]: Without dead ends: 303 [2021-02-24 00:17:21,160 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 [2021-02-24 00:17:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-24 00:17:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 224. [2021-02-24 00:17:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-02-24 00:17:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2021-02-24 00:17:21,184 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 74 [2021-02-24 00:17:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:21,185 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2021-02-24 00:17:21,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 00:17:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2021-02-24 00:17:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-02-24 00:17:21,186 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:21,186 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] [2021-02-24 00:17:21,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 00:17:21,187 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:21,187 INFO L82 PathProgramCache]: Analyzing trace with hash -448602513, now seen corresponding path program 1 times [2021-02-24 00:17:21,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:21,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499950933] [2021-02-24 00:17:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:21,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:21,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:21,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:21,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:21,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:21,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:21,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:21,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:21,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:21,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:21,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:21,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:21,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-02-24 00:17:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:21,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:21,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:21,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499950933] [2021-02-24 00:17:21,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:21,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:17:21,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235389967] [2021-02-24 00:17:21,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:17:21,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:21,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:17:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:17:21,331 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 10 states. [2021-02-24 00:17:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:22,052 INFO L93 Difference]: Finished difference Result 457 states and 502 transitions. [2021-02-24 00:17:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-24 00:17:22,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2021-02-24 00:17:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:22,055 INFO L225 Difference]: With dead ends: 457 [2021-02-24 00:17:22,055 INFO L226 Difference]: Without dead ends: 345 [2021-02-24 00:17:22,056 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 [2021-02-24 00:17:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-02-24 00:17:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 280. [2021-02-24 00:17:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2021-02-24 00:17:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 309 transitions. [2021-02-24 00:17:22,087 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 309 transitions. Word has length 76 [2021-02-24 00:17:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:22,087 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 309 transitions. [2021-02-24 00:17:22,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:17:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 309 transitions. [2021-02-24 00:17:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-02-24 00:17:22,089 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:22,089 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] [2021-02-24 00:17:22,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 00:17:22,089 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -825247660, now seen corresponding path program 1 times [2021-02-24 00:17:22,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:22,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241790944] [2021-02-24 00:17:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:22,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:22,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:22,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:17:22,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:17:22,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:22,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:22,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:22,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:22,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:22,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:22,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:22,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:22,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:22,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:22,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:22,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-24 00:17:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:22,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:22,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:22,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241790944] [2021-02-24 00:17:22,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:22,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-24 00:17:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606225394] [2021-02-24 00:17:22,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-24 00:17:22,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-24 00:17:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:17:22,325 INFO L87 Difference]: Start difference. First operand 280 states and 309 transitions. Second operand 14 states. [2021-02-24 00:17:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:23,058 INFO L93 Difference]: Finished difference Result 456 states and 498 transitions. [2021-02-24 00:17:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-24 00:17:23,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2021-02-24 00:17:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:23,061 INFO L225 Difference]: With dead ends: 456 [2021-02-24 00:17:23,062 INFO L226 Difference]: Without dead ends: 336 [2021-02-24 00:17:23,063 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 [2021-02-24 00:17:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-02-24 00:17:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 274. [2021-02-24 00:17:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2021-02-24 00:17:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 302 transitions. [2021-02-24 00:17:23,100 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 302 transitions. Word has length 79 [2021-02-24 00:17:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:23,100 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 302 transitions. [2021-02-24 00:17:23,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-24 00:17:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 302 transitions. [2021-02-24 00:17:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-24 00:17:23,102 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:23,103 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] [2021-02-24 00:17:23,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-24 00:17:23,103 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2146927954, now seen corresponding path program 1 times [2021-02-24 00:17:23,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:23,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915750220] [2021-02-24 00:17:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:23,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:23,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:23,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:23,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:23,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:23,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:23,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:23,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:23,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:23,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:23,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:23,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-02-24 00:17:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:23,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-24 00:17:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915750220] [2021-02-24 00:17:23,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:23,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 00:17:23,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940551826] [2021-02-24 00:17:23,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:17:23,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:23,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:17:23,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:17:23,279 INFO L87 Difference]: Start difference. First operand 274 states and 302 transitions. Second operand 10 states. [2021-02-24 00:17:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:23,894 INFO L93 Difference]: Finished difference Result 449 states and 494 transitions. [2021-02-24 00:17:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-24 00:17:23,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2021-02-24 00:17:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:23,900 INFO L225 Difference]: With dead ends: 449 [2021-02-24 00:17:23,900 INFO L226 Difference]: Without dead ends: 341 [2021-02-24 00:17:23,901 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 [2021-02-24 00:17:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-02-24 00:17:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 278. [2021-02-24 00:17:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2021-02-24 00:17:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 306 transitions. [2021-02-24 00:17:23,941 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 306 transitions. Word has length 80 [2021-02-24 00:17:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:23,941 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 306 transitions. [2021-02-24 00:17:23,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:17:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 306 transitions. [2021-02-24 00:17:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-24 00:17:23,945 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:23,945 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] [2021-02-24 00:17:23,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-24 00:17:23,946 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash -157951433, now seen corresponding path program 1 times [2021-02-24 00:17:23,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:23,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604593940] [2021-02-24 00:17:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:23,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:23,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:23,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:24,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:24,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 00:17:24,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:24,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:17:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:24,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:24,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604593940] [2021-02-24 00:17:24,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:24,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:17:24,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608890891] [2021-02-24 00:17:24,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:17:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:24,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:17:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:17:24,106 INFO L87 Difference]: Start difference. First operand 278 states and 306 transitions. Second operand 10 states. [2021-02-24 00:17:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:24,771 INFO L93 Difference]: Finished difference Result 627 states and 694 transitions. [2021-02-24 00:17:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-24 00:17:24,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2021-02-24 00:17:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:24,775 INFO L225 Difference]: With dead ends: 627 [2021-02-24 00:17:24,775 INFO L226 Difference]: Without dead ends: 468 [2021-02-24 00:17:24,778 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 [2021-02-24 00:17:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-02-24 00:17:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 389. [2021-02-24 00:17:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2021-02-24 00:17:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 430 transitions. [2021-02-24 00:17:24,832 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 430 transitions. Word has length 85 [2021-02-24 00:17:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:24,832 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 430 transitions. [2021-02-24 00:17:24,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:17:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 430 transitions. [2021-02-24 00:17:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-24 00:17:24,835 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:24,836 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] [2021-02-24 00:17:24,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-24 00:17:24,836 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash -851163776, now seen corresponding path program 2 times [2021-02-24 00:17:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:24,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224139750] [2021-02-24 00:17:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:24,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:24,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:24,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:24,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:24,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:24,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:24,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:25,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:25,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:25,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-02-24 00:17:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:25,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224139750] [2021-02-24 00:17:25,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:25,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:17:25,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336567844] [2021-02-24 00:17:25,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:17:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:17:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:17:25,067 INFO L87 Difference]: Start difference. First operand 389 states and 430 transitions. Second operand 12 states. [2021-02-24 00:17:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:25,863 INFO L93 Difference]: Finished difference Result 730 states and 805 transitions. [2021-02-24 00:17:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-24 00:17:25,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2021-02-24 00:17:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:25,867 INFO L225 Difference]: With dead ends: 730 [2021-02-24 00:17:25,867 INFO L226 Difference]: Without dead ends: 561 [2021-02-24 00:17:25,869 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 [2021-02-24 00:17:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-02-24 00:17:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 388. [2021-02-24 00:17:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2021-02-24 00:17:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 428 transitions. [2021-02-24 00:17:25,912 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 428 transitions. Word has length 86 [2021-02-24 00:17:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:25,912 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 428 transitions. [2021-02-24 00:17:25,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:17:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 428 transitions. [2021-02-24 00:17:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-24 00:17:25,914 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:25,915 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] [2021-02-24 00:17:25,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-24 00:17:25,915 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1979143261, now seen corresponding path program 2 times [2021-02-24 00:17:25,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:25,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046299162] [2021-02-24 00:17:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:25,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:25,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:25,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:25,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:17:26,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:17:26,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:26,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:26,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:26,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:26,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:26,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:26,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:26,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:26,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:26,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:26,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:26,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:26,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:26,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-02-24 00:17:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:26,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:26,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:26,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046299162] [2021-02-24 00:17:26,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:26,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-24 00:17:26,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568168405] [2021-02-24 00:17:26,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-24 00:17:26,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:26,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-24 00:17:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:17:26,192 INFO L87 Difference]: Start difference. First operand 388 states and 428 transitions. Second operand 16 states. [2021-02-24 00:17:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:27,139 INFO L93 Difference]: Finished difference Result 571 states and 626 transitions. [2021-02-24 00:17:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-24 00:17:27,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2021-02-24 00:17:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:27,142 INFO L225 Difference]: With dead ends: 571 [2021-02-24 00:17:27,142 INFO L226 Difference]: Without dead ends: 378 [2021-02-24 00:17:27,143 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 [2021-02-24 00:17:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-02-24 00:17:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 337. [2021-02-24 00:17:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2021-02-24 00:17:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 370 transitions. [2021-02-24 00:17:27,199 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 370 transitions. Word has length 89 [2021-02-24 00:17:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:27,200 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 370 transitions. [2021-02-24 00:17:27,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-24 00:17:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 370 transitions. [2021-02-24 00:17:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-24 00:17:27,201 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:27,202 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] [2021-02-24 00:17:27,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-24 00:17:27,204 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash 801821473, now seen corresponding path program 1 times [2021-02-24 00:17:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:27,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140616209] [2021-02-24 00:17:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:27,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:27,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:27,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:27,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:27,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:27,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:27,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:27,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:27,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:27,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:27,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:17:27,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:27,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:27,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:27,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-02-24 00:17:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:27,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:27,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-24 00:17:27,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140616209] [2021-02-24 00:17:27,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:27,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:17:27,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867119016] [2021-02-24 00:17:27,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:17:27,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:27,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:17:27,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:17:27,392 INFO L87 Difference]: Start difference. First operand 337 states and 370 transitions. Second operand 12 states. [2021-02-24 00:17:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:28,130 INFO L93 Difference]: Finished difference Result 609 states and 669 transitions. [2021-02-24 00:17:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-24 00:17:28,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2021-02-24 00:17:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:28,134 INFO L225 Difference]: With dead ends: 609 [2021-02-24 00:17:28,134 INFO L226 Difference]: Without dead ends: 489 [2021-02-24 00:17:28,135 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 [2021-02-24 00:17:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-02-24 00:17:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 367. [2021-02-24 00:17:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2021-02-24 00:17:28,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 404 transitions. [2021-02-24 00:17:28,175 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 404 transitions. Word has length 90 [2021-02-24 00:17:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:28,175 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 404 transitions. [2021-02-24 00:17:28,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:17:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 404 transitions. [2021-02-24 00:17:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-24 00:17:28,177 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:28,177 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] [2021-02-24 00:17:28,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-24 00:17:28,177 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:28,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:28,178 INFO L82 PathProgramCache]: Analyzing trace with hash 766699332, now seen corresponding path program 2 times [2021-02-24 00:17:28,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:28,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468582068] [2021-02-24 00:17:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:28,230 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:28,245 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:28,287 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:17:28,288 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:17:28,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-24 00:17:28,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:28 BoogieIcfgContainer [2021-02-24 00:17:28,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:28,379 INFO L168 Benchmark]: Toolchain (without parser) took 13694.82 ms. Allocated memory was 160.4 MB in the beginning and 368.1 MB in the end (delta: 207.6 MB). Free memory was 136.3 MB in the beginning and 336.8 MB in the end (delta: -200.5 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:28,379 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 138.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:28,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.12 ms. Allocated memory is still 160.4 MB. Free memory was 135.2 MB in the beginning and 123.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:28,380 INFO L168 Benchmark]: Boogie Preprocessor took 65.02 ms. Allocated memory is still 160.4 MB. Free memory was 123.7 MB in the beginning and 121.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:28,380 INFO L168 Benchmark]: RCFGBuilder took 689.10 ms. Allocated memory is still 160.4 MB. Free memory was 121.6 MB in the beginning and 125.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:28,380 INFO L168 Benchmark]: TraceAbstraction took 12561.91 ms. Allocated memory was 160.4 MB in the beginning and 368.1 MB in the end (delta: 207.6 MB). Free memory was 125.3 MB in the beginning and 336.8 MB in the end (delta: -211.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:28,383 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 138.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 357.12 ms. Allocated memory is still 160.4 MB. Free memory was 135.2 MB in the beginning and 123.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.02 ms. Allocated memory is still 160.4 MB. Free memory was 123.7 MB in the beginning and 121.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 689.10 ms. Allocated memory is still 160.4 MB. Free memory was 121.6 MB in the beginning and 125.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12561.91 ms. Allocated memory was 160.4 MB in the beginning and 368.1 MB in the end (delta: 207.6 MB). Free memory was 125.3 MB in the beginning and 336.8 MB in the end (delta: -211.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L85] char A [2 + 2 + 4 +1]; VAL [A={6:0}] [L86] A[2 + 2 + 4] = 0 VAL [A={6:0}] [L87] CALL parse_expression_list (A) VAL [str={6:0}] [L59] int start=0, i=-1, j=-1; VAL [i=-1, j=-1, start=0, str={6:0}, str={6:0}] [L60] char str2[2]; VAL [i=-1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L61] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L63] i++ VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L64] str[i] VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=58] [L65] case 0: VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=58] [L80] EXPR str[i] VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=58] [L80] COND TRUE str[i] != 0 VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=58] [L63] i++ VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L64] str[i] VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=52] [L65] case 0: VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=52] [L80] EXPR str[i] VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=52] [L80] COND TRUE str[i] != 0 VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=52] [L63] i++ VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L64] str[i] VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L65] case 0: VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L66] EXPR str[start] VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=58] [L66] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=58] [L66] EXPR str[start] VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=58, str[start]=58] [L66] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=58, str[start]=58] [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=58, str[start]=58] [L67] EXPR str[start] VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=58] [L67] COND FALSE !(str[start] == '"') VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=58] [L68] j = i-1 VAL [i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L69] EXPR str[j] VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52] [L69] EXPR str[j] VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52, str[j]=52] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52, str[j]=52] [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52, str[j]=52] [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52, str[j]=52] [L70] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=1, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L70] EXPR str[j] VAL [(0 < j) && (str[j] == '"')=1, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52] [L70] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52] [L70] COND FALSE !((0 < j) && (str[j] == '"')) VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=52] [L71] COND TRUE start<=j VAL [i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L72] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={3:0}, src={6:0}] [L41] return strncpy(dest,src,n); VAL [\old(n)=2, \result={55:54}, dest={3:0}, dest={3:0}, n=2, src={6:0}, src={6:0}, strncpy(dest,src,n)={55:54}] [L72] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={55:54}, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L73] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L15] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.4s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2157 SDtfs, 2790 SDslu, 8604 SDs, 0 SdLazy, 5390 SolverSat, 262 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 1288 NumberOfCodeBlocks, 1288 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1176 ConstructedInterpolants, 0 QuantifiedInterpolants, 249928 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 10 PerfectInterpolantSequences, 22/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...