/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:13:09,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:13:09,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:13:09,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:13:09,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:13:09,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:13:09,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:13:09,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:13:09,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:13:09,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:13:09,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:13:09,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:13:09,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:13:09,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:13:09,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:13:09,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:13:09,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:13:09,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:13:09,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:13:09,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:13:09,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:13:09,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:13:09,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:13:09,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:13:09,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:13:09,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:13:09,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:13:09,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:13:09,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:13:09,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:13:09,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:13:09,613 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:13:09,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:13:09,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:13:09,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:13:09,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:13:09,615 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:13:09,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:13:09,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:13:09,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:13:09,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:13:09,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:13:09,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:13:09,616 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:13:09,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:13:10,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:13:10,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:13:10,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:13:10,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:13:10,076 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:13:10,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2021-02-24 04:13:10,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d97d6603/50a81879216e475c9b01e7b66b525cef/FLAG4f42e7aa9 [2021-02-24 04:13:10,906 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:13:10,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2021-02-24 04:13:10,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d97d6603/50a81879216e475c9b01e7b66b525cef/FLAG4f42e7aa9 [2021-02-24 04:13:11,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d97d6603/50a81879216e475c9b01e7b66b525cef [2021-02-24 04:13:11,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:13:11,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:13:11,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:13:11,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:13:11,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:13:11,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d55038c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11, skipping insertion in model container [2021-02-24 04:13:11,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:13:11,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:13:11,521 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-simple/id_b2_o3.c[568,581] [2021-02-24 04:13:11,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:13:11,536 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:13:11,554 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-simple/id_b2_o3.c[568,581] [2021-02-24 04:13:11,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:13:11,572 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:13:11,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11 WrapperNode [2021-02-24 04:13:11,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:13:11,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:13:11,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:13:11,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:13:11,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... [2021-02-24 04:13:11,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:13:11,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:13:11,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:13:11,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:13:11,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:13:11,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:13:11,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:13:11,723 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:13:11,723 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-24 04:13:11,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:13:11,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 04:13:11,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:13:11,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:13:11,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:13:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:13:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-24 04:13:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:13:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:13:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:13:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:13:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:13:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:13:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:13:12,098 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:13:12,098 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:13:12,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:13:12 BoogieIcfgContainer [2021-02-24 04:13:12,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:13:12,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:13:12,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:13:12,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:13:12,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:13:11" (1/3) ... [2021-02-24 04:13:12,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d45156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:13:12, skipping insertion in model container [2021-02-24 04:13:12,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:13:11" (2/3) ... [2021-02-24 04:13:12,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d45156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:13:12, skipping insertion in model container [2021-02-24 04:13:12,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:13:12" (3/3) ... [2021-02-24 04:13:12,161 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2021-02-24 04:13:12,194 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:13:12,206 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:13:12,230 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:13:12,289 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:13:12,290 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:13:12,290 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:13:12,290 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:13:12,290 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:13:12,291 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:13:12,291 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:13:12,291 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:13:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-24 04:13:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 04:13:12,334 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:12,336 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] [2021-02-24 04:13:12,337 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1616677185, now seen corresponding path program 1 times [2021-02-24 04:13:12,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:12,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131559476] [2021-02-24 04:13:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:12,474 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:12,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:12,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:12,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:12,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:12,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:12,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:13:12,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:12,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:12,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:12,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:12,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:13:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:12,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:12,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:12,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:12,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:13:12,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131559476] [2021-02-24 04:13:12,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:12,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:13:12,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223955769] [2021-02-24 04:13:12,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:13:12,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:13,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:13:13,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:13:13,005 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2021-02-24 04:13:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:13,398 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-24 04:13:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:13:13,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-24 04:13:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:13,416 INFO L225 Difference]: With dead ends: 49 [2021-02-24 04:13:13,417 INFO L226 Difference]: Without dead ends: 33 [2021-02-24 04:13:13,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:13:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-24 04:13:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-24 04:13:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-24 04:13:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-02-24 04:13:13,495 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 24 [2021-02-24 04:13:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:13,496 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-02-24 04:13:13,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:13:13,496 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-02-24 04:13:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 04:13:13,499 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:13,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:13:13,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:13:13,501 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:13,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2119372388, now seen corresponding path program 1 times [2021-02-24 04:13:13,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:13,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729741847] [2021-02-24 04:13:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:13,520 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:13,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:13,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:13,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:13,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:13,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:13:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:13,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:13,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:13,796 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:13:13,799 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:13:13,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:13,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:13,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:13,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:13,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:13:13,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729741847] [2021-02-24 04:13:13,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:13,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:13:13,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659753700] [2021-02-24 04:13:13,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:13:13,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:13:13,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:13:13,862 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2021-02-24 04:13:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:14,118 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-02-24 04:13:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:13:14,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-02-24 04:13:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:14,122 INFO L225 Difference]: With dead ends: 51 [2021-02-24 04:13:14,122 INFO L226 Difference]: Without dead ends: 39 [2021-02-24 04:13:14,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:13:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-24 04:13:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-02-24 04:13:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-24 04:13:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-02-24 04:13:14,140 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-02-24 04:13:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:14,141 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-02-24 04:13:14,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:13:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-02-24 04:13:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 04:13:14,143 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:14,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:13:14,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:13:14,144 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:14,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1209934172, now seen corresponding path program 1 times [2021-02-24 04:13:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:14,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398066479] [2021-02-24 04:13:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:14,148 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:14,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:14,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:14,200 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:13:14,202 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:13:14,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:14,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:14,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:14,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:13:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:14,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:14,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:14,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:14,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:14,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:14,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:14,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:14,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:13:14,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398066479] [2021-02-24 04:13:14,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:14,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:13:14,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243541955] [2021-02-24 04:13:14,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:13:14,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:13:14,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:13:14,503 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2021-02-24 04:13:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:15,029 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-02-24 04:13:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:13:15,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-02-24 04:13:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:15,032 INFO L225 Difference]: With dead ends: 44 [2021-02-24 04:13:15,032 INFO L226 Difference]: Without dead ends: 39 [2021-02-24 04:13:15,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:13:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-24 04:13:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-02-24 04:13:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-24 04:13:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-24 04:13:15,048 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2021-02-24 04:13:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:15,048 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-24 04:13:15,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:13:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-24 04:13:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:13:15,050 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:15,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-24 04:13:15,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:13:15,051 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2045487603, now seen corresponding path program 1 times [2021-02-24 04:13:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:15,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800451966] [2021-02-24 04:13:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:15,056 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:15,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:15,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:13:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:15,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:15,248 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:13:15,250 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:13:15,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:15,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:15,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:15,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:15,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:15,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-24 04:13:15,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800451966] [2021-02-24 04:13:15,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:15,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:13:15,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075163959] [2021-02-24 04:13:15,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:13:15,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:15,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:13:15,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:13:15,381 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 9 states. [2021-02-24 04:13:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:15,860 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-02-24 04:13:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:13:15,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-24 04:13:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:15,862 INFO L225 Difference]: With dead ends: 57 [2021-02-24 04:13:15,863 INFO L226 Difference]: Without dead ends: 45 [2021-02-24 04:13:15,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-02-24 04:13:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-24 04:13:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-02-24 04:13:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-24 04:13:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-02-24 04:13:15,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 42 [2021-02-24 04:13:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:15,879 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-02-24 04:13:15,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:13:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-02-24 04:13:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:13:15,881 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:15,881 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-24 04:13:15,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:13:15,882 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:15,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1283818957, now seen corresponding path program 2 times [2021-02-24 04:13:15,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:15,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832458212] [2021-02-24 04:13:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:15,886 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:15,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:15,929 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 04:13:15,930 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 04:13:15,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:15,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:15,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:15,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:13:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:16,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:16,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:16,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:16,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:16,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:16,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:16,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:16,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:16,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:16,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:16,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:16,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:16,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-24 04:13:16,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832458212] [2021-02-24 04:13:16,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:16,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-24 04:13:16,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392228040] [2021-02-24 04:13:16,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 04:13:16,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:16,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 04:13:16,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-24 04:13:16,179 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2021-02-24 04:13:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:16,984 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-02-24 04:13:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-24 04:13:16,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2021-02-24 04:13:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:16,986 INFO L225 Difference]: With dead ends: 52 [2021-02-24 04:13:16,986 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 04:13:16,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-24 04:13:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 04:13:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-24 04:13:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-24 04:13:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-24 04:13:17,003 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-02-24 04:13:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:17,003 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-24 04:13:17,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 04:13:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-24 04:13:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-24 04:13:17,005 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:13:17,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:13:17,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:13:17,006 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:13:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:13:17,007 INFO L82 PathProgramCache]: Analyzing trace with hash -273173928, now seen corresponding path program 3 times [2021-02-24 04:13:17,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:13:17,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522434154] [2021-02-24 04:13:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:13:17,010 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:13:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:17,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:13:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:17,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-24 04:13:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:17,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,118 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 04:13:17,120 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 04:13:17,146 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 04:13:17,147 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 04:13:17,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:17,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:17,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-24 04:13:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:13:17,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:13:17,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:13:17,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:13:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-02-24 04:13:17,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522434154] [2021-02-24 04:13:17,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:13:17,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-24 04:13:17,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131485030] [2021-02-24 04:13:17,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 04:13:17,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:13:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 04:13:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-24 04:13:17,330 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 12 states. [2021-02-24 04:13:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:13:18,136 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-02-24 04:13:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-24 04:13:18,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2021-02-24 04:13:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:13:18,137 INFO L225 Difference]: With dead ends: 53 [2021-02-24 04:13:18,137 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 04:13:18,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-02-24 04:13:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 04:13:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 04:13:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 04:13:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 04:13:18,141 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-02-24 04:13:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:13:18,142 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 04:13:18,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 04:13:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 04:13:18,142 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 04:13:18,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:13:18,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 04:13:18,554 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2021-02-24 04:13:18,784 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-24 04:13:18,944 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-02-24 04:13:19,409 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-02-24 04:13:19,418 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-24 04:13:19,418 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-24 04:13:19,419 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-24 04:13:19,419 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-24 04:13:19,419 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-24 04:13:19,419 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 04:13:19,419 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 04:13:19,419 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2021-02-24 04:13:19,420 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|)) [2021-02-24 04:13:19,420 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-24 04:13:19,420 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-24 04:13:19,421 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-24 04:13:19,421 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 04:13:19,421 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 04:13:19,421 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 04:13:19,421 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 04:13:19,421 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 04:13:19,422 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: false [2021-02-24 04:13:19,422 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2021-02-24 04:13:19,422 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 13 19) the Hoare annotation is: true [2021-02-24 04:13:19,422 INFO L185 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: false [2021-02-24 04:13:19,422 INFO L185 CegarLoopUtils]: At program point L16(lines 16 18) the Hoare annotation is: (and (<= main_~result~0 2) (< 0 (+ (div main_~result~0 4294967296) 1))) [2021-02-24 04:13:19,423 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: false [2021-02-24 04:13:19,423 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-24 04:13:19,423 INFO L192 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: true [2021-02-24 04:13:19,423 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (or (and (<= 1 |main_#t~ret9|) (<= |main_#t~ret9| 1)) (and (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|)) (= |main_#t~ret9| 0)) [2021-02-24 04:13:19,423 INFO L192 CegarLoopUtils]: At program point L16-2(lines 13 19) the Hoare annotation is: true [2021-02-24 04:13:19,423 INFO L185 CegarLoopUtils]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= 1 |main_#t~ret9|) (<= main_~result~0 1) (<= |main_#t~ret9| 1) .cse0) (and (= main_~result~0 0) (= |main_#t~ret9| 0)) (and (<= main_~result~0 2) (<= |main_#t~ret9| 2) (<= 2 |main_#t~ret9|) .cse0))) [2021-02-24 04:13:19,424 INFO L185 CegarLoopUtils]: At program point idFINAL(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2021-02-24 04:13:19,424 INFO L185 CegarLoopUtils]: At program point idEXIT(lines 6 11) the Hoare annotation is: (let ((.cse0 (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0))) (.cse1 (and (<= 0 |id_#res|) (<= |id_#res| 0)))) (and (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) .cse0 .cse1) (or .cse0 .cse1 (and (<= 2 |id_#res|) (<= |id_#res| 2))))) [2021-02-24 04:13:19,424 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-02-24 04:13:19,424 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2021-02-24 04:13:19,425 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2021-02-24 04:13:19,425 INFO L192 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-02-24 04:13:19,425 INFO L185 CegarLoopUtils]: At program point L9-1(line 9) the Hoare annotation is: (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) [2021-02-24 04:13:19,425 INFO L192 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: true [2021-02-24 04:13:19,426 INFO L185 CegarLoopUtils]: At program point L8-1(line 8) the Hoare annotation is: (or (and (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|)) (and (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= 0 |id_#t~ret7|) (<= |id_#t~ret7| 0))) [2021-02-24 04:13:19,426 INFO L192 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: true [2021-02-24 04:13:19,426 INFO L185 CegarLoopUtils]: At program point L8-2(line 8) the Hoare annotation is: (or (and (<= 3 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|)) (and (<= id_~ret~0 2) (<= |id_#t~ret7| 1) (<= 1 |id_#t~ret7|) (<= 2 id_~ret~0)) (and (<= 0 |id_#t~ret7|) (<= id_~ret~0 1) (<= |id_#t~ret7| 0) (<= 1 id_~ret~0))) [2021-02-24 04:13:19,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:13:19 BoogieIcfgContainer [2021-02-24 04:13:19,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:13:19,479 INFO L168 Benchmark]: Toolchain (without parser) took 8185.02 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 128.0 MB in the beginning and 196.4 MB in the end (delta: -68.4 MB). Peak memory consumption was 130.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:19,480 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:13:19,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.48 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:19,484 INFO L168 Benchmark]: Boogie Preprocessor took 34.09 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:19,484 INFO L168 Benchmark]: RCFGBuilder took 492.23 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:19,487 INFO L168 Benchmark]: TraceAbstraction took 7361.86 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 133.5 MB in the beginning and 196.4 MB in the end (delta: -62.9 MB). Peak memory consumption was 134.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:13:19,490 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.48 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.09 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 492.23 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.0 MB in the end (delta: -18.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7361.86 ms. Allocated memory was 151.0 MB in the beginning and 231.7 MB in the end (delta: 80.7 MB). Free memory was 133.5 MB in the beginning and 196.4 MB in the end (delta: -62.9 MB). Peak memory consumption was 134.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id: ((((ret <= 2 && 2 <= ret) || (3 <= ret && ret / 4294967296 <= 0)) || (((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret)) || (0 <= \result && \result <= 0)) && (((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (0 <= \result && \result <= 0)) || (2 <= \result && \result <= 2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 178 SDtfs, 191 SDslu, 515 SDs, 0 SdLazy, 871 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 47 PreInvPairs, 107 NumberOfFragments, 371 HoareAnnotationTreeSize, 47 FomulaSimplifications, 6276 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 36 FomulaSimplificationsInter, 1398 FormulaSimplificationTreeSizeReductionInter, 0.9s 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...