/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/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:38:43,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:38:43,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:38:43,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:38:43,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:38:43,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:38:43,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:38:43,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:38:43,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:38:43,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:38:43,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:38:43,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:38:43,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:38:43,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:38:43,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:38:43,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:38:43,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:38:43,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:38:43,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:38:43,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:38:43,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:38:43,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:38:43,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:38:43,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:38:43,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 17:38:43,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 17:38:43,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 17:38:43,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 17:38:43,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 17:38:43,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 17:38:43,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 17:38:43,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 17:38:43,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 17:38:43,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 17:38:43,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 17:38:43,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 17:38:43,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 17:38:43,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 17:38:43,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:38:43,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:38:43,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:38:43,743 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 17:38:43,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:38:43,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:38:43,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:38:43,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:38:43,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:38:43,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:38:43,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:38:43,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:38:43,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:38:43,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:38:43,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:38:43,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:38:43,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:38:43,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:38:43,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:38:43,775 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:38:43,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:38:43,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:38:43,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:38:43,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:38:43,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:38:43,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:38:43,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:38:44,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:38:44,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:38:44,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:38:44,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:38:44,210 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:38:44,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2021-02-23 17:38:44,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ecd8ee1/4386af2853f844148f1d0dc0f76e5e77/FLAG7f82bc6e5 [2021-02-23 17:38:44,910 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:38:44,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2021-02-23 17:38:44,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ecd8ee1/4386af2853f844148f1d0dc0f76e5e77/FLAG7f82bc6e5 [2021-02-23 17:38:45,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ecd8ee1/4386af2853f844148f1d0dc0f76e5e77 [2021-02-23 17:38:45,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:38:45,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:38:45,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:45,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:38:45,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:38:45,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@353be7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45, skipping insertion in model container [2021-02-23 17:38:45,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:38:45,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:38:45,487 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c[1234,1247] [2021-02-23 17:38:45,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:45,502 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:38:45,521 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c[1234,1247] [2021-02-23 17:38:45,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:38:45,538 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:38:45,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45 WrapperNode [2021-02-23 17:38:45,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:38:45,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:38:45,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:38:45,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:38:45,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (1/1) ... [2021-02-23 17:38:45,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:38:45,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:38:45,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:38:45,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:38:45,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (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 17:38:45,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:38:45,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:38:45,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:38:45,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-02-23 17:38:45,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:38:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:38:45,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:38:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:38:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:38:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:38:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-02-23 17:38:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:38:45,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:38:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:38:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:38:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:38:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:38:45,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:38:46,007 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:38:46,008 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:38:46,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:46 BoogieIcfgContainer [2021-02-23 17:38:46,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:38:46,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:38:46,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:38:46,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:38:46,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:38:45" (1/3) ... [2021-02-23 17:38:46,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586d3e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:46, skipping insertion in model container [2021-02-23 17:38:46,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:38:45" (2/3) ... [2021-02-23 17:38:46,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586d3e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:38:46, skipping insertion in model container [2021-02-23 17:38:46,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:38:46" (3/3) ... [2021-02-23 17:38:46,019 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2021-02-23 17:38:46,027 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:38:46,032 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:38:46,069 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:38:46,109 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:38:46,109 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:38:46,110 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:38:46,110 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:38:46,110 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:38:46,110 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:38:46,110 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:38:46,110 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:38:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-23 17:38:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 17:38:46,153 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:46,154 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] [2021-02-23 17:38:46,155 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash 305373308, now seen corresponding path program 1 times [2021-02-23 17:38:46,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:46,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340323821] [2021-02-23 17:38:46,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:46,287 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:46,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:46,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:46,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:46,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:46,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:46,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:46,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:46,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:46,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:46,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:46,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:46,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 17:38:46,683 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 17:38:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340323821] [2021-02-23 17:38:46,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:46,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:38:46,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489852915] [2021-02-23 17:38:46,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:38:46,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:38:46,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:38:46,717 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 8 states. [2021-02-23 17:38:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:47,330 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-02-23 17:38:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:38:47,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-23 17:38:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:47,347 INFO L225 Difference]: With dead ends: 70 [2021-02-23 17:38:47,348 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 17:38:47,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:38:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 17:38:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-23 17:38:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 17:38:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-02-23 17:38:47,457 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2021-02-23 17:38:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:47,458 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-02-23 17:38:47,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:38:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-02-23 17:38:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 17:38:47,465 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:47,465 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 17:38:47,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:38:47,466 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:47,468 INFO L82 PathProgramCache]: Analyzing trace with hash -40053035, now seen corresponding path program 1 times [2021-02-23 17:38:47,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:47,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319729329] [2021-02-23 17:38:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:47,482 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:47,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:47,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:47,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:47,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:47,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:47,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:47,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:47,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:47,781 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 17:38:47,783 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 17:38:47,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:47,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 17:38:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 17:38:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319729329] [2021-02-23 17:38:47,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:47,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:38:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074031782] [2021-02-23 17:38:47,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:38:47,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:47,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:38:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:38:47,850 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2021-02-23 17:38:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:48,411 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-23 17:38:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:38:48,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-23 17:38:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:48,420 INFO L225 Difference]: With dead ends: 58 [2021-02-23 17:38:48,420 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 17:38:48,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:38:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 17:38:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 17:38:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:38:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-02-23 17:38:48,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 42 [2021-02-23 17:38:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:48,460 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-02-23 17:38:48,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:38:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-02-23 17:38:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 17:38:48,473 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:48,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-02-23 17:38:48,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:38:48,474 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1732856645, now seen corresponding path program 1 times [2021-02-23 17:38:48,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:48,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139762311] [2021-02-23 17:38:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:48,482 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:38:48,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:48,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:48,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 17:38:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:48,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:48,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 17:38:48,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139762311] [2021-02-23 17:38:48,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:48,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:38:48,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496935134] [2021-02-23 17:38:48,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:38:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:38:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:38:48,638 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2021-02-23 17:38:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:48,898 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-02-23 17:38:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:38:48,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2021-02-23 17:38:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:48,900 INFO L225 Difference]: With dead ends: 81 [2021-02-23 17:38:48,901 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 17:38:48,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:38:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 17:38:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-02-23 17:38:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 17:38:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-23 17:38:48,944 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 51 [2021-02-23 17:38:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:48,944 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-23 17:38:48,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:38:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-23 17:38:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-23 17:38:48,948 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:48,948 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-02-23 17:38:48,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:38:48,949 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:48,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1101309652, now seen corresponding path program 1 times [2021-02-23 17:38:48,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:48,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939657435] [2021-02-23 17:38:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:48,953 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,252 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 17:38:49,253 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 17:38:49,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 17:38:49,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 17:38:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:49,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:49,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:49,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:49,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 17:38:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-02-23 17:38:49,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939657435] [2021-02-23 17:38:49,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:49,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 17:38:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897029128] [2021-02-23 17:38:49,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 17:38:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 17:38:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:38:49,342 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 14 states. [2021-02-23 17:38:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:50,907 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-02-23 17:38:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 17:38:50,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2021-02-23 17:38:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:50,912 INFO L225 Difference]: With dead ends: 95 [2021-02-23 17:38:50,912 INFO L226 Difference]: Without dead ends: 89 [2021-02-23 17:38:50,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 17:38:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-23 17:38:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2021-02-23 17:38:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-23 17:38:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-02-23 17:38:50,942 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 61 [2021-02-23 17:38:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:50,942 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-02-23 17:38:50,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 17:38:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-02-23 17:38:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 17:38:50,944 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:50,944 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-02-23 17:38:50,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:38:50,945 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash 752897773, now seen corresponding path program 2 times [2021-02-23 17:38:50,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:50,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912897145] [2021-02-23 17:38:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:50,948 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:50,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:50,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:50,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:50,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 17:38:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-02-23 17:38:51,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912897145] [2021-02-23 17:38:51,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:51,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:38:51,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761623621] [2021-02-23 17:38:51,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:38:51,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:51,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:38:51,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:38:51,137 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 8 states. [2021-02-23 17:38:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:51,598 INFO L93 Difference]: Finished difference Result 133 states and 200 transitions. [2021-02-23 17:38:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:38:51,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2021-02-23 17:38:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:51,602 INFO L225 Difference]: With dead ends: 133 [2021-02-23 17:38:51,602 INFO L226 Difference]: Without dead ends: 89 [2021-02-23 17:38:51,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:38:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-23 17:38:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-02-23 17:38:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-02-23 17:38:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-02-23 17:38:51,639 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 71 [2021-02-23 17:38:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:51,640 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-02-23 17:38:51,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:38:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-02-23 17:38:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 17:38:51,642 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:51,642 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-02-23 17:38:51,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:38:51,642 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2141089131, now seen corresponding path program 3 times [2021-02-23 17:38:51,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:51,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212389524] [2021-02-23 17:38:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:51,645 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,829 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 17:38:51,830 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 17:38:51,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 17:38:51,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 17:38:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:51,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:51,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:51,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:51,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 17:38:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-02-23 17:38:51,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212389524] [2021-02-23 17:38:51,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:51,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 17:38:51,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727335810] [2021-02-23 17:38:51,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 17:38:51,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:51,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 17:38:51,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-23 17:38:51,921 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 15 states. [2021-02-23 17:38:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:53,488 INFO L93 Difference]: Finished difference Result 162 states and 253 transitions. [2021-02-23 17:38:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 17:38:53,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-02-23 17:38:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:53,494 INFO L225 Difference]: With dead ends: 162 [2021-02-23 17:38:53,494 INFO L226 Difference]: Without dead ends: 156 [2021-02-23 17:38:53,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 17:38:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-23 17:38:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-02-23 17:38:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-23 17:38:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-02-23 17:38:53,539 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 71 [2021-02-23 17:38:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:53,540 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-02-23 17:38:53,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 17:38:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-02-23 17:38:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 17:38:53,542 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:53,542 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 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] [2021-02-23 17:38:53,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:38:53,542 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash -887616517, now seen corresponding path program 4 times [2021-02-23 17:38:53,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:53,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668838992] [2021-02-23 17:38:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:53,546 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:53,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 17:38:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:53,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:53,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-02-23 17:38:53,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668838992] [2021-02-23 17:38:53,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:53,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 17:38:53,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624412704] [2021-02-23 17:38:53,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 17:38:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 17:38:53,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:38:53,699 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 5 states. [2021-02-23 17:38:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:53,912 INFO L93 Difference]: Finished difference Result 152 states and 226 transitions. [2021-02-23 17:38:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 17:38:53,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2021-02-23 17:38:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:53,919 INFO L225 Difference]: With dead ends: 152 [2021-02-23 17:38:53,920 INFO L226 Difference]: Without dead ends: 86 [2021-02-23 17:38:53,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:38:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-23 17:38:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-02-23 17:38:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-23 17:38:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2021-02-23 17:38:53,978 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 91 [2021-02-23 17:38:53,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:53,979 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2021-02-23 17:38:53,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 17:38:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2021-02-23 17:38:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-02-23 17:38:53,987 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:38:53,987 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-23 17:38:53,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:38:53,988 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:38:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:38:53,988 INFO L82 PathProgramCache]: Analyzing trace with hash 703900207, now seen corresponding path program 5 times [2021-02-23 17:38:53,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:38:53,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651666711] [2021-02-23 17:38:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:38:53,992 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:38:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:38:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:38:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,256 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 17:38:54,256 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 17:38:54,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 17:38:54,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 17:38:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 17:38:54,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-23 17:38:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:38:54,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 17:38:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:38:54,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:38:54,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:38:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-02-23 17:38:54,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651666711] [2021-02-23 17:38:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:38:54,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 17:38:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807139381] [2021-02-23 17:38:54,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 17:38:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:38:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 17:38:54,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:38:54,382 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand 17 states. [2021-02-23 17:38:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:38:56,180 INFO L93 Difference]: Finished difference Result 153 states and 242 transitions. [2021-02-23 17:38:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 17:38:56,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 100 [2021-02-23 17:38:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:38:56,183 INFO L225 Difference]: With dead ends: 153 [2021-02-23 17:38:56,183 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 17:38:56,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=1345, Unknown=0, NotChecked=0, Total=1722 [2021-02-23 17:38:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 17:38:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 17:38:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 17:38:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 17:38:56,188 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-02-23 17:38:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:38:56,189 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 17:38:56,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 17:38:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 17:38:56,189 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 17:38:56,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:38:56,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 17:38:59,378 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-23 17:38:59,582 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2021-02-23 17:38:59,839 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2021-02-23 17:39:00,062 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2021-02-23 17:39:00,218 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2021-02-23 17:39:00,337 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 14 [2021-02-23 17:39:00,674 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2021-02-23 17:39:01,183 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 19 [2021-02-23 17:39:01,341 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 19 [2021-02-23 17:39:01,527 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2021-02-23 17:39:01,912 WARN L202 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2021-02-23 17:39:01,917 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 17:39:01,917 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 17:39:01,917 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 17:39:01,918 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 17:39:01,918 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 17:39:01,918 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 17:39:01,918 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 17:39:01,918 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 17:39:01,918 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 17:39:01,918 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 17:39:01,918 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point L35-2(line 35) the Hoare annotation is: true [2021-02-23 17:39:01,919 INFO L192 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-02-23 17:39:01,920 INFO L192 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: true [2021-02-23 17:39:01,920 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 28 48) the Hoare annotation is: true [2021-02-23 17:39:01,920 INFO L185 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: false [2021-02-23 17:39:01,920 INFO L185 CegarLoopUtils]: At program point L46-1(line 46) the Hoare annotation is: false [2021-02-23 17:39:01,920 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 28 48) the Hoare annotation is: true [2021-02-23 17:39:01,920 INFO L185 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (<= 0 main_~n~0) [2021-02-23 17:39:01,920 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (<= 0 main_~n~0) [2021-02-23 17:39:01,920 INFO L185 CegarLoopUtils]: At program point L42-1(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 |main_#t~ret12|)) [2021-02-23 17:39:01,920 INFO L192 CegarLoopUtils]: At program point L40(line 40) the Hoare annotation is: true [2021-02-23 17:39:01,920 INFO L185 CegarLoopUtils]: At program point L42-2(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 |main_#t~ret12|)) [2021-02-23 17:39:01,921 INFO L185 CegarLoopUtils]: At program point L42-3(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 |main_#t~ret12|) (<= 1 main_~result~0)) [2021-02-23 17:39:01,921 INFO L192 CegarLoopUtils]: At program point L36(lines 36 41) the Hoare annotation is: true [2021-02-23 17:39:01,921 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) the Hoare annotation is: false [2021-02-23 17:39:01,921 INFO L192 CegarLoopUtils]: At program point L30(lines 30 34) the Hoare annotation is: true [2021-02-23 17:39:01,921 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 28 48) the Hoare annotation is: true [2021-02-23 17:39:01,921 INFO L185 CegarLoopUtils]: At program point L43(lines 43 47) the Hoare annotation is: (and (<= 0 main_~n~0) (<= 1 main_~result~0)) [2021-02-23 17:39:01,921 INFO L192 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-02-23 17:39:01,921 INFO L192 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: true [2021-02-23 17:39:01,922 INFO L185 CegarLoopUtils]: At program point ackermannEXIT(lines 17 25) the Hoare annotation is: (let ((.cse5 (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) (.cse3 (= |ackermann_#in~m| 0))) (and (let ((.cse0 (<= 2 |ackermann_#res|)) (.cse4 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse1 (or (and .cse0 .cse4) (and .cse5 .cse4))) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 (<= |ackermann_#in~m| 1) .cse1 (= |ackermann_#in~n| 0) .cse2) (and .cse1 .cse2 .cse3) (and (<= 3 |ackermann_#res|) .cse4 .cse2)))) (or (and .cse5 .cse3) (<= 1 |ackermann_#in~m|)))) [2021-02-23 17:39:01,922 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 17:39:01,922 INFO L185 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3) (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3))))) [2021-02-23 17:39:01,922 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 17:39:01,922 INFO L185 CegarLoopUtils]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 .cse1 .cse2 .cse3) (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3))))) [2021-02-23 17:39:01,922 INFO L192 CegarLoopUtils]: At program point ackermannENTRY(lines 17 25) the Hoare annotation is: true [2021-02-23 17:39:01,922 INFO L185 CegarLoopUtils]: At program point L21(lines 21 23) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 17:39:01,923 INFO L185 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: (let ((.cse0 (= |ackermann_#in~n| 0)) (.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) .cse0 .cse1 (<= 2 |ackermann_#t~ret7|) .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse3 (<= 3 |ackermann_#t~ret7|)))) [2021-02-23 17:39:01,923 INFO L185 CegarLoopUtils]: At program point L24-3(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (<= 3 |ackermann_#t~ret9|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= 1 |ackermann_#in~m|)) (.cse4 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 .cse4))))) [2021-02-23 17:39:01,923 INFO L185 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (= |ackermann_#in~n| 0)) (.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~m|)) (.cse3 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) .cse0 .cse1 (<= 2 |ackermann_#t~ret7|) .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse3 (<= 3 |ackermann_#t~ret7|)))) [2021-02-23 17:39:01,923 INFO L185 CegarLoopUtils]: At program point L24-4(line 24) the Hoare annotation is: (let ((.cse0 (<= 3 |ackermann_#t~ret8|))) (and (or (= |ackermann_#in~n| 1) (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) .cse0) (let ((.cse1 (<= 3 |ackermann_#t~ret9|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (<= 1 |ackermann_#in~m|)) (.cse4 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 .cse4))))) [2021-02-23 17:39:01,923 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (= |ackermann_#in~m| 0)) [2021-02-23 17:39:01,924 INFO L185 CegarLoopUtils]: At program point L22-3(line 22) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (let ((.cse0 (= ackermann_~n |ackermann_#in~n|))) (or (and (<= 3 |ackermann_#res|) .cse0 (<= 3 |ackermann_#t~ret7|)) (and (<= 2 |ackermann_#res|) (<= |ackermann_#in~m| 1) .cse0 (<= 2 |ackermann_#t~ret7|)))) (<= 1 |ackermann_#in~m|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 17:39:01,924 INFO L185 CegarLoopUtils]: At program point L24-5(line 24) the Hoare annotation is: (and (let ((.cse0 (<= 1 |ackermann_#in~m|))) (or (and (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret8|) .cse0) (and (<= 3 |ackermann_#t~ret8|) .cse0))) (<= 3 |ackermann_#t~ret9|) (<= 3 |ackermann_#res|) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 17:39:01,924 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 17:39:01,924 INFO L185 CegarLoopUtils]: At program point L24-6(line 24) the Hoare annotation is: (and (<= 3 |ackermann_#t~ret9|) (<= 3 |ackermann_#res|) (= ackermann_~n |ackermann_#in~n|) (<= 1 |ackermann_#in~m|) (= ackermann_~m |ackermann_#in~m|)) [2021-02-23 17:39:01,924 INFO L185 CegarLoopUtils]: At program point L17(lines 17 25) the Hoare annotation is: (= ackermann_~m |ackermann_#in~m|) [2021-02-23 17:39:01,925 INFO L185 CegarLoopUtils]: At program point ackermannFINAL(lines 17 25) the Hoare annotation is: (let ((.cse5 (<= (+ |ackermann_#in~n| 1) |ackermann_#res|)) (.cse3 (= |ackermann_#in~m| 0))) (and (let ((.cse0 (<= 2 |ackermann_#res|)) (.cse4 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse1 (or (and .cse0 .cse4) (and .cse5 .cse4))) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and .cse0 (<= |ackermann_#in~m| 1) .cse1 (= |ackermann_#in~n| 0) .cse2) (and .cse1 .cse2 .cse3) (and (<= 3 |ackermann_#res|) .cse4 .cse2)))) (or (and .cse5 .cse3) (<= 1 |ackermann_#in~m|)))) [2021-02-23 17:39:01,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:39:01 BoogieIcfgContainer [2021-02-23 17:39:01,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:39:01,946 INFO L168 Benchmark]: Toolchain (without parser) took 16683.66 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 128.3 MB in the beginning and 285.7 MB in the end (delta: -157.4 MB). Peak memory consumption was 189.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:01,947 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:39:01,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.82 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:01,947 INFO L168 Benchmark]: Boogie Preprocessor took 34.41 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:01,948 INFO L168 Benchmark]: RCFGBuilder took 434.12 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 100.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:01,948 INFO L168 Benchmark]: TraceAbstraction took 15933.79 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 99.9 MB in the beginning and 285.7 MB in the end (delta: -185.9 MB). Peak memory consumption was 160.8 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:01,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 124.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.82 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.41 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 434.12 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 100.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15933.79 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 99.9 MB in the beginning and 285.7 MB in the end (delta: -185.9 MB). Peak memory consumption was 160.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 17]: Procedure Contract for ackermann Derived contract for procedure ackermann: ((((((2 <= \result && \old(m) <= 1) && ((2 <= \result && n == \old(n)) || (\old(n) + 1 <= \result && n == \old(n)))) && \old(n) == 0) && m == \old(m)) || ((((2 <= \result && n == \old(n)) || (\old(n) + 1 <= \result && n == \old(n))) && m == \old(m)) && \old(m) == 0)) || ((3 <= \result && n == \old(n)) && m == \old(m))) && ((\old(n) + 1 <= \result && \old(m) == 0) || 1 <= \old(m)) - ProcedureContractResult [Line: 28]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.0s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 631 SDslu, 608 SDs, 0 SdLazy, 2378 SolverSat, 389 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 95 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 53 LocationsWithAnnotation, 575 PreInvPairs, 1016 NumberOfFragments, 664 HoareAnnotationTreeSize, 575 FomulaSimplifications, 177269 FormulaSimplificationTreeSizeReduction, 2.8s HoareSimplificationTime, 53 FomulaSimplificationsInter, 6618 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...