/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:19:15,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:19:15,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:19:15,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:19:15,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:19:15,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:19:15,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:19:15,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:19:15,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:19:15,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:19:15,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:19:15,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:19:15,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:19:15,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:19:15,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:19:15,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:19:15,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:19:15,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:19:16,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:19:16,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:19:16,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:19:16,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:19:16,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:19:16,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:19:16,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 18:19:16,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 18:19:16,026 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 18:19:16,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 18:19:16,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 18:19:16,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 18:19:16,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 18:19:16,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 18:19:16,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 18:19:16,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 18:19:16,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 18:19:16,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 18:19:16,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 18:19:16,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 18:19:16,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:19:16,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:19:16,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:19:16,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:19:16,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:19:16,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:19:16,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:19:16,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:19:16,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:19:16,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:19:16,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:19:16,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:19:16,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:19:16,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:19:16,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:19:16,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:19:16,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:19:16,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:19:16,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:19:16,072 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:19:16,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:19:16,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:19:16,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:19:16,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:19:16,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:19:16,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:19:16,073 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:19:16,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:19:16,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:19:16,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:19:16,485 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:19:16,486 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:19:16,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2021-02-23 18:19:16,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ae43921/36e65bb6a5fc4c25bf01d8899a9dce1e/FLAGad6dc4e18 [2021-02-23 18:19:17,305 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:19:17,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2021-02-23 18:19:17,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ae43921/36e65bb6a5fc4c25bf01d8899a9dce1e/FLAGad6dc4e18 [2021-02-23 18:19:17,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31ae43921/36e65bb6a5fc4c25bf01d8899a9dce1e [2021-02-23 18:19:17,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:19:17,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:19:17,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:19:17,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:19:17,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:19:17,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:19:17" (1/1) ... [2021-02-23 18:19:17,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586de8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:17, skipping insertion in model container [2021-02-23 18:19:17,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:19:17" (1/1) ... [2021-02-23 18:19:17,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:19:17,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:19:18,091 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label14.c[18715,18728] [2021-02-23 18:19:18,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:19:18,166 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:19:18,244 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label14.c[18715,18728] [2021-02-23 18:19:18,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:19:18,275 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:19:18,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18 WrapperNode [2021-02-23 18:19:18,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:19:18,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:19:18,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:19:18,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:19:18,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (1/1) ... [2021-02-23 18:19:18,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (1/1) ... [2021-02-23 18:19:18,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (1/1) ... [2021-02-23 18:19:18,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (1/1) ... [2021-02-23 18:19:18,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (1/1) ... [2021-02-23 18:19:18,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (1/1) ... [2021-02-23 18:19:18,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (1/1) ... [2021-02-23 18:19:18,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:19:18,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:19:18,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:19:18,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:19:18,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (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 [2021-02-23 18:19:18,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:19:18,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:19:18,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:19:18,585 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2021-02-23 18:19:18,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:19:18,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2021-02-23 18:19:18,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:19:18,586 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:19:18,587 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:19:18,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:19:18,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:19:18,588 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 18:19:18,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:19:18,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:19:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:19:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:19:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:19:18,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:19:18,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:19:20,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:19:20,281 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:19:20,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:19:20 BoogieIcfgContainer [2021-02-23 18:19:20,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:19:20,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:19:20,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:19:20,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:19:20,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:19:17" (1/3) ... [2021-02-23 18:19:20,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b0ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:19:20, skipping insertion in model container [2021-02-23 18:19:20,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:19:18" (2/3) ... [2021-02-23 18:19:20,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b0ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:19:20, skipping insertion in model container [2021-02-23 18:19:20,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:19:20" (3/3) ... [2021-02-23 18:19:20,294 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label14.c [2021-02-23 18:19:20,301 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:19:20,307 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:19:20,326 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:19:20,351 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:19:20,351 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:19:20,352 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:19:20,352 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:19:20,352 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:19:20,352 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:19:20,352 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:19:20,352 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:19:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states. [2021-02-23 18:19:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-02-23 18:19:20,425 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:19:20,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:19:20,427 INFO L428 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:19:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:19:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash -268055961, now seen corresponding path program 1 times [2021-02-23 18:19:20,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:19:20,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564033351] [2021-02-23 18:19:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:19:20,515 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:19:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:19:21,015 WARN L141 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size [2021-02-23 18:19:21,016 WARN L147 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size 4 [2021-02-23 18:19:21,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:21,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:19:21,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:21,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:19:21,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:21,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:21,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:19:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:19:21,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:21,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:21,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:21,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:19:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:19:21,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564033351] [2021-02-23 18:19:21,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:19:21,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:19:21,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252393757] [2021-02-23 18:19:21,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:19:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:19:21,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:19:21,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:19:21,332 INFO L87 Difference]: Start difference. First operand 536 states. Second operand 5 states. [2021-02-23 18:19:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:19:23,998 INFO L93 Difference]: Finished difference Result 1214 states and 1660 transitions. [2021-02-23 18:19:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:19:24,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2021-02-23 18:19:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:19:24,022 INFO L225 Difference]: With dead ends: 1214 [2021-02-23 18:19:24,023 INFO L226 Difference]: Without dead ends: 635 [2021-02-23 18:19:24,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:19:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-02-23 18:19:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 621. [2021-02-23 18:19:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2021-02-23 18:19:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 782 transitions. [2021-02-23 18:19:24,248 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 782 transitions. Word has length 151 [2021-02-23 18:19:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:19:24,252 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 782 transitions. [2021-02-23 18:19:24,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:19:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 782 transitions. [2021-02-23 18:19:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-02-23 18:19:24,272 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:19:24,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:19:24,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:19:24,273 INFO L428 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:19:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:19:24,275 INFO L82 PathProgramCache]: Analyzing trace with hash 513334099, now seen corresponding path program 1 times [2021-02-23 18:19:24,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:19:24,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360544732] [2021-02-23 18:19:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:19:24,545 WARN L141 QuantifierPusher]: treesize reduction 12, result has 93.8 percent of original size [2021-02-23 18:19:24,574 WARN L147 QuantifierPusher]: treesize reduction 12, result has 93.8 percent of original size 180 [2021-02-23 18:19:24,714 WARN L141 QuantifierPusher]: treesize reduction 179, result has 50.1 percent of original size [2021-02-23 18:19:24,719 WARN L147 QuantifierPusher]: treesize reduction 179, result has 50.1 percent of original size 180 [2021-02-23 18:19:24,833 WARN L141 QuantifierPusher]: treesize reduction 174, result has 50.1 percent of original size [2021-02-23 18:19:24,838 WARN L147 QuantifierPusher]: treesize reduction 174, result has 50.1 percent of original size 175 [2021-02-23 18:19:24,944 WARN L141 QuantifierPusher]: treesize reduction 174, result has 50.1 percent of original size [2021-02-23 18:19:24,952 WARN L147 QuantifierPusher]: treesize reduction 174, result has 50.1 percent of original size 175 [2021-02-23 18:19:24,953 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:19:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:19:25,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:19:25,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:19:25,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:19:25,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:19:25,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:19:25,257 WARN L141 QuantifierPusher]: treesize reduction 34, result has 20.9 percent of original size [2021-02-23 18:19:25,259 WARN L147 QuantifierPusher]: treesize reduction 34, result has 20.9 percent of original size 9 [2021-02-23 18:19:25,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:19:25,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:25,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:19:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:19:25,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:25,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:19:25,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:19:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:19:25,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:19:25,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:19:25,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-23 18:19:25,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 184 [2021-02-23 18:19:25,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:19:25,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-02-23 18:19:25,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:19:25,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:19:25,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:19:25,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:19:25,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:19:25,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:19:25,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 18:19:25,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-02-23 18:19:25,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 18:19:25,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:25,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 18:19:25,827 WARN L141 QuantifierPusher]: treesize reduction 14, result has 79.1 percent of original size [2021-02-23 18:19:25,828 WARN L147 QuantifierPusher]: treesize reduction 14, result has 79.1 percent of original size 53 [2021-02-23 18:19:25,901 WARN L141 QuantifierPusher]: treesize reduction 3, result has 96.1 percent of original size [2021-02-23 18:19:25,902 WARN L147 QuantifierPusher]: treesize reduction 3, result has 96.1 percent of original size 73 [2021-02-23 18:19:26,042 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-02-23 18:19:26,046 WARN L141 QuantifierPusher]: treesize reduction 25, result has 73.4 percent of original size [2021-02-23 18:19:26,047 WARN L147 QuantifierPusher]: treesize reduction 25, result has 73.4 percent of original size 69 [2021-02-23 18:19:26,049 WARN L141 QuantifierPusher]: treesize reduction 3, result has 96.8 percent of original size [2021-02-23 18:19:26,053 WARN L147 QuantifierPusher]: treesize reduction 3, result has 96.8 percent of original size 92 [2021-02-23 18:19:26,187 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-02-23 18:19:26,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:26,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-02-23 18:19:26,367 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-23 18:19:26,372 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:19:26,374 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 132 [2021-02-23 18:19:26,552 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-02-23 18:19:26,557 WARN L141 QuantifierPusher]: treesize reduction 23, result has 86.8 percent of original size [2021-02-23 18:19:26,560 WARN L147 QuantifierPusher]: treesize reduction 23, result has 86.8 percent of original size 151 [2021-02-23 18:19:26,738 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-23 18:19:26,742 WARN L141 QuantifierPusher]: treesize reduction 161, result has 0.6 percent of original size [2021-02-23 18:19:26,742 WARN L147 QuantifierPusher]: treesize reduction 161, result has 0.6 percent of original size 1 [2021-02-23 18:19:26,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:26,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:26,745 WARN L141 QuantifierPusher]: treesize reduction 29, result has 3.3 percent of original size [2021-02-23 18:19:26,746 WARN L147 QuantifierPusher]: treesize reduction 29, result has 3.3 percent of original size 1 [2021-02-23 18:19:26,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360544732] [2021-02-23 18:19:26,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:19:26,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-23 18:19:26,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653474086] [2021-02-23 18:19:26,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 18:19:26,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:19:26,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 18:19:26,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-02-23 18:19:26,750 INFO L87 Difference]: Start difference. First operand 621 states and 782 transitions. Second operand 18 states. [2021-02-23 18:19:27,193 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-02-23 18:19:27,323 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-02-23 18:19:27,460 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-23 18:19:27,597 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-23 18:19:27,738 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-02-23 18:19:27,915 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-23 18:19:28,116 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-02-23 18:19:28,342 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-02-23 18:19:28,542 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-02-23 18:19:28,804 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-02-23 18:19:29,077 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-02-23 18:19:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:19:36,079 INFO L93 Difference]: Finished difference Result 2599 states and 3548 transitions. [2021-02-23 18:19:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-23 18:19:36,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 177 [2021-02-23 18:19:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:19:36,104 INFO L225 Difference]: With dead ends: 2599 [2021-02-23 18:19:36,104 INFO L226 Difference]: Without dead ends: 2008 [2021-02-23 18:19:36,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2021-02-23 18:19:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-02-23 18:19:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1396. [2021-02-23 18:19:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2021-02-23 18:19:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1835 transitions. [2021-02-23 18:19:36,524 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1835 transitions. Word has length 177 [2021-02-23 18:19:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:19:36,525 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 1835 transitions. [2021-02-23 18:19:36,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 18:19:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1835 transitions. [2021-02-23 18:19:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-02-23 18:19:36,533 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:19:36,534 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:19:36,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:19:36,535 INFO L428 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:19:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:19:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash -784266539, now seen corresponding path program 1 times [2021-02-23 18:19:36,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:19:36,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989072052] [2021-02-23 18:19:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:19:36,664 WARN L141 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size [2021-02-23 18:19:36,669 WARN L147 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size 170 [2021-02-23 18:19:36,762 WARN L141 QuantifierPusher]: treesize reduction 169, result has 50.1 percent of original size [2021-02-23 18:19:36,766 WARN L147 QuantifierPusher]: treesize reduction 169, result has 50.1 percent of original size 170 [2021-02-23 18:19:36,857 WARN L141 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size [2021-02-23 18:19:36,861 WARN L147 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size 170 [2021-02-23 18:19:36,952 WARN L141 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size [2021-02-23 18:19:36,956 WARN L147 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size 170 [2021-02-23 18:19:37,045 WARN L141 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size [2021-02-23 18:19:37,048 WARN L147 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size 170 [2021-02-23 18:19:37,133 WARN L141 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size [2021-02-23 18:19:37,137 WARN L147 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size 170 [2021-02-23 18:19:37,254 WARN L141 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size [2021-02-23 18:19:37,258 WARN L147 QuantifierPusher]: treesize reduction 12, result has 93.4 percent of original size 170 [2021-02-23 18:19:37,352 WARN L141 QuantifierPusher]: treesize reduction 169, result has 50.1 percent of original size [2021-02-23 18:19:37,356 WARN L147 QuantifierPusher]: treesize reduction 169, result has 50.1 percent of original size 170 [2021-02-23 18:19:37,357 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:19:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:19:37,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:19:37,574 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-23 18:19:37,575 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-23 18:19:37,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:19:37,577 WARN L141 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size [2021-02-23 18:19:37,578 WARN L147 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size 10 [2021-02-23 18:19:37,586 WARN L141 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size [2021-02-23 18:19:37,587 WARN L147 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size 10 [2021-02-23 18:19:37,588 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-23 18:19:37,589 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-23 18:19:37,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:19:37,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:19:37,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:19:37,622 WARN L141 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size [2021-02-23 18:19:37,622 WARN L147 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size 4 [2021-02-23 18:19:37,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:19:37,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:37,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:19:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:19:37,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:37,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:19:37,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:19:37,747 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-23 18:19:37,748 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-23 18:19:37,766 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-23 18:19:37,767 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-23 18:19:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:19:37,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-23 18:19:37,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:19:37,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:19:37,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:19:37,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:19:37,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:19:37,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:19:37,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:19:37,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-02-23 18:19:37,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:19:37,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:19:37,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:19:37,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:19:37,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 18:19:37,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 18:19:37,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:37,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-02-23 18:19:38,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:38,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-02-23 18:19:38,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:38,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 18:19:38,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:38,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-02-23 18:19:38,134 WARN L141 QuantifierPusher]: treesize reduction 38, result has 45.7 percent of original size [2021-02-23 18:19:38,135 WARN L147 QuantifierPusher]: treesize reduction 38, result has 45.7 percent of original size 32 [2021-02-23 18:19:38,136 WARN L141 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size [2021-02-23 18:19:38,138 WARN L147 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size 52 [2021-02-23 18:19:38,190 WARN L141 QuantifierPusher]: treesize reduction 25, result has 67.5 percent of original size [2021-02-23 18:19:38,191 WARN L147 QuantifierPusher]: treesize reduction 25, result has 67.5 percent of original size 52 [2021-02-23 18:19:38,200 WARN L141 QuantifierPusher]: treesize reduction 26, result has 66.7 percent of original size [2021-02-23 18:19:38,203 WARN L147 QuantifierPusher]: treesize reduction 26, result has 66.7 percent of original size 52 [2021-02-23 18:19:38,205 WARN L141 QuantifierPusher]: treesize reduction 24, result has 68.4 percent of original size [2021-02-23 18:19:38,206 WARN L147 QuantifierPusher]: treesize reduction 24, result has 68.4 percent of original size 52 [2021-02-23 18:19:38,208 WARN L141 QuantifierPusher]: treesize reduction 7, result has 91.1 percent of original size [2021-02-23 18:19:38,209 WARN L147 QuantifierPusher]: treesize reduction 7, result has 91.1 percent of original size 72 [2021-02-23 18:19:38,279 WARN L141 QuantifierPusher]: treesize reduction 46, result has 61.0 percent of original size [2021-02-23 18:19:38,280 WARN L147 QuantifierPusher]: treesize reduction 46, result has 61.0 percent of original size 72 [2021-02-23 18:19:38,282 WARN L141 QuantifierPusher]: treesize reduction 48, result has 60.0 percent of original size [2021-02-23 18:19:38,284 WARN L147 QuantifierPusher]: treesize reduction 48, result has 60.0 percent of original size 72 [2021-02-23 18:19:38,286 WARN L141 QuantifierPusher]: treesize reduction 38, result has 65.5 percent of original size [2021-02-23 18:19:38,287 WARN L147 QuantifierPusher]: treesize reduction 38, result has 65.5 percent of original size 72 [2021-02-23 18:19:38,289 WARN L141 QuantifierPusher]: treesize reduction 37, result has 66.1 percent of original size [2021-02-23 18:19:38,291 WARN L147 QuantifierPusher]: treesize reduction 37, result has 66.1 percent of original size 72 [2021-02-23 18:19:38,292 WARN L141 QuantifierPusher]: treesize reduction 27, result has 72.7 percent of original size [2021-02-23 18:19:38,295 WARN L147 QuantifierPusher]: treesize reduction 27, result has 72.7 percent of original size 72 [2021-02-23 18:19:38,297 WARN L141 QuantifierPusher]: treesize reduction 46, result has 61.0 percent of original size [2021-02-23 18:19:38,298 WARN L147 QuantifierPusher]: treesize reduction 46, result has 61.0 percent of original size 72 [2021-02-23 18:19:38,301 WARN L141 QuantifierPusher]: treesize reduction 28, result has 72.0 percent of original size [2021-02-23 18:19:38,303 WARN L147 QuantifierPusher]: treesize reduction 28, result has 72.0 percent of original size 72 [2021-02-23 18:19:38,304 WARN L141 QuantifierPusher]: treesize reduction 26, result has 73.5 percent of original size [2021-02-23 18:19:38,306 WARN L147 QuantifierPusher]: treesize reduction 26, result has 73.5 percent of original size 72 [2021-02-23 18:19:38,307 WARN L141 QuantifierPusher]: treesize reduction 28, result has 72.0 percent of original size [2021-02-23 18:19:38,332 WARN L147 QuantifierPusher]: treesize reduction 28, result has 72.0 percent of original size 72 [2021-02-23 18:19:38,334 WARN L141 QuantifierPusher]: treesize reduction 48, result has 60.0 percent of original size [2021-02-23 18:19:38,335 WARN L147 QuantifierPusher]: treesize reduction 48, result has 60.0 percent of original size 72 [2021-02-23 18:19:38,337 WARN L141 QuantifierPusher]: treesize reduction 37, result has 66.1 percent of original size [2021-02-23 18:19:38,338 WARN L147 QuantifierPusher]: treesize reduction 37, result has 66.1 percent of original size 72 [2021-02-23 18:19:38,340 WARN L141 QuantifierPusher]: treesize reduction 27, result has 72.7 percent of original size [2021-02-23 18:19:38,341 WARN L147 QuantifierPusher]: treesize reduction 27, result has 72.7 percent of original size 72 [2021-02-23 18:19:38,343 WARN L141 QuantifierPusher]: treesize reduction 46, result has 61.0 percent of original size [2021-02-23 18:19:38,344 WARN L147 QuantifierPusher]: treesize reduction 46, result has 61.0 percent of original size 72 [2021-02-23 18:19:38,345 WARN L141 QuantifierPusher]: treesize reduction 26, result has 73.5 percent of original size [2021-02-23 18:19:38,347 WARN L147 QuantifierPusher]: treesize reduction 26, result has 73.5 percent of original size 72 [2021-02-23 18:19:38,348 WARN L141 QuantifierPusher]: treesize reduction 27, result has 72.7 percent of original size [2021-02-23 18:19:38,349 WARN L147 QuantifierPusher]: treesize reduction 27, result has 72.7 percent of original size 72 [2021-02-23 18:19:38,351 WARN L141 QuantifierPusher]: treesize reduction 25, result has 74.2 percent of original size [2021-02-23 18:19:38,352 WARN L147 QuantifierPusher]: treesize reduction 25, result has 74.2 percent of original size 72 [2021-02-23 18:19:38,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:38,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:38,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:38,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:38,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:19:38,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:19:38,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989072052] [2021-02-23 18:19:38,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:19:38,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 18:19:38,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276681417] [2021-02-23 18:19:38,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 18:19:38,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:19:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 18:19:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-02-23 18:19:38,358 INFO L87 Difference]: Start difference. First operand 1396 states and 1835 transitions. Second operand 16 states. [2021-02-23 18:19:38,543 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-23 18:19:38,693 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-02-23 18:19:38,832 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-23 18:19:38,966 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-02-23 18:19:39,105 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-02-23 18:19:39,246 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-02-23 18:19:39,391 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-23 18:19:39,572 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-02-23 18:19:39,841 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-02-23 18:19:43,440 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-23 18:19:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:19:46,751 INFO L93 Difference]: Finished difference Result 4881 states and 6723 transitions. [2021-02-23 18:19:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-23 18:19:46,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 191 [2021-02-23 18:19:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:19:46,781 INFO L225 Difference]: With dead ends: 4881 [2021-02-23 18:19:46,781 INFO L226 Difference]: Without dead ends: 3515 [2021-02-23 18:19:46,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=433, Invalid=899, Unknown=0, NotChecked=0, Total=1332 [2021-02-23 18:19:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-02-23 18:19:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 2679. [2021-02-23 18:19:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2679 states. [2021-02-23 18:19:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3371 transitions. [2021-02-23 18:19:47,426 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3371 transitions. Word has length 191 [2021-02-23 18:19:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:19:47,427 INFO L480 AbstractCegarLoop]: Abstraction has 2679 states and 3371 transitions. [2021-02-23 18:19:47,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 18:19:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3371 transitions. [2021-02-23 18:19:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-02-23 18:19:47,439 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:19:47,440 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:19:47,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:19:47,440 INFO L428 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:19:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:19:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash 498234396, now seen corresponding path program 1 times [2021-02-23 18:19:47,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:19:47,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644873355] [2021-02-23 18:19:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:19:47,470 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 25 [2021-02-23 18:20:48,768 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 1747072 conjuctions. This might take some time...