/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/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:51:03,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:51:03,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:51:03,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:51:03,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:51:03,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:51:03,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:51:03,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:51:03,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:51:03,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:51:03,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:51:03,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:51:03,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:51:03,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:51:03,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:51:03,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:51:03,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:51:03,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:51:03,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:51:03,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:51:03,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:51:03,794 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:51:03,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:51:03,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:51:03,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:51:03,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:51:03,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:51:03,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:51:03,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:51:03,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:51:03,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:51:03,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:51:03,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:51:03,797 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:51:03,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:51:03,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:51:03,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:51:03,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:51:03,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:51:03,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:51:03,799 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:51:03,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:51:04,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:51:04,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:51:04,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:51:04,347 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:51:04,348 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:51:04,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2021-02-22 01:51:04,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d787a7272/6d5fa414e0c34c198c219a3d38b394c7/FLAGbfb9c539f [2021-02-22 01:51:05,185 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:51:05,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2021-02-22 01:51:05,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d787a7272/6d5fa414e0c34c198c219a3d38b394c7/FLAGbfb9c539f [2021-02-22 01:51:05,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d787a7272/6d5fa414e0c34c198c219a3d38b394c7 [2021-02-22 01:51:05,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:51:05,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:51:05,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:51:05,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:51:05,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:51:05,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:51:05" (1/1) ... [2021-02-22 01:51:05,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f032912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:05, skipping insertion in model container [2021-02-22 01:51:05,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:51:05" (1/1) ... [2021-02-22 01:51:05,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:51:05,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:51:05,950 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/sum_2x3-2.c[479,492] [2021-02-22 01:51:05,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:51:05,970 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:51:05,992 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/sum_2x3-2.c[479,492] [2021-02-22 01:51:05,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:51:06,012 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:51:06,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06 WrapperNode [2021-02-22 01:51:06,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:51:06,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:51:06,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:51:06,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:51:06,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (1/1) ... [2021-02-22 01:51:06,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (1/1) ... [2021-02-22 01:51:06,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (1/1) ... [2021-02-22 01:51:06,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (1/1) ... [2021-02-22 01:51:06,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (1/1) ... [2021-02-22 01:51:06,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (1/1) ... [2021-02-22 01:51:06,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (1/1) ... [2021-02-22 01:51:06,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:51:06,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:51:06,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:51:06,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:51:06,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (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 [2021-02-22 01:51:06,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:51:06,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:51:06,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:51:06,210 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-02-22 01:51:06,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:51:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:51:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:51:06,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:51:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:51:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-02-22 01:51:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:51:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:51:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:51:06,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:51:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:51:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:51:06,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:51:06,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:51:06,531 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:51:06,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:51:06 BoogieIcfgContainer [2021-02-22 01:51:06,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:51:06,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:51:06,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:51:06,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:51:06,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:51:05" (1/3) ... [2021-02-22 01:51:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436c5501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:51:06, skipping insertion in model container [2021-02-22 01:51:06,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:51:06" (2/3) ... [2021-02-22 01:51:06,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436c5501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:51:06, skipping insertion in model container [2021-02-22 01:51:06,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:51:06" (3/3) ... [2021-02-22 01:51:06,567 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2021-02-22 01:51:06,590 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:51:06,607 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:51:06,656 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:51:06,685 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:51:06,685 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:51:06,685 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:51:06,686 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:51:06,686 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:51:06,686 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:51:06,686 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:51:06,686 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:51:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-22 01:51:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-22 01:51:06,737 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:51:06,738 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] [2021-02-22 01:51:06,738 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:51:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:51:06,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133070, now seen corresponding path program 1 times [2021-02-22 01:51:06,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:51:06,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667723082] [2021-02-22 01:51:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:51:06,866 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:51:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:07,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:07,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:07,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:07,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:51:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:07,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:07,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:51:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:07,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:07,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:51:07,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:51:07,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667723082] [2021-02-22 01:51:07,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:51:07,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 01:51:07,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136324768] [2021-02-22 01:51:07,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 01:51:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:51:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 01:51:07,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:51:07,486 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2021-02-22 01:51:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:51:07,784 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-02-22 01:51:07,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 01:51:07,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-22 01:51:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:51:07,797 INFO L225 Difference]: With dead ends: 48 [2021-02-22 01:51:07,797 INFO L226 Difference]: Without dead ends: 33 [2021-02-22 01:51:07,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:51:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-22 01:51:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-22 01:51:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-22 01:51:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-22 01:51:07,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-02-22 01:51:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:51:07,859 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-22 01:51:07,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 01:51:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-22 01:51:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 01:51:07,862 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:51:07,862 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] [2021-02-22 01:51:07,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:51:07,863 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:51:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:51:07,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1822905144, now seen corresponding path program 1 times [2021-02-22 01:51:07,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:51:07,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866548632] [2021-02-22 01:51:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:51:07,868 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:51:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:07,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:07,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:07,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:07,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:51:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:07,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:07,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:51:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:07,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:07,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:07,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:51:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:08,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:08,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:51:08,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-22 01:51:08,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866548632] [2021-02-22 01:51:08,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:51:08,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 01:51:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350231889] [2021-02-22 01:51:08,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 01:51:08,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:51:08,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 01:51:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-22 01:51:08,067 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-22 01:51:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:51:08,356 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-02-22 01:51:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:51:08,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-22 01:51:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:51:08,359 INFO L225 Difference]: With dead ends: 44 [2021-02-22 01:51:08,359 INFO L226 Difference]: Without dead ends: 38 [2021-02-22 01:51:08,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-22 01:51:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-22 01:51:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-22 01:51:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-22 01:51:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-22 01:51:08,377 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-02-22 01:51:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:51:08,378 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-22 01:51:08,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 01:51:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-22 01:51:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-22 01:51:08,380 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:51:08,380 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:51:08,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:51:08,381 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:51:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:51:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1004193542, now seen corresponding path program 2 times [2021-02-22 01:51:08,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:51:08,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750281482] [2021-02-22 01:51:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:51:08,386 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:51:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:08,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:08,455 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-22 01:51:08,456 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-22 01:51:08,461 WARN L141 QuantifierPusher]: treesize reduction 2, result has 87.5 percent of original size [2021-02-22 01:51:08,462 WARN L147 QuantifierPusher]: treesize reduction 2, result has 87.5 percent of original size 14 [2021-02-22 01:51:08,478 WARN L141 QuantifierPusher]: treesize reduction 9, result has 75.0 percent of original size [2021-02-22 01:51:08,480 WARN L147 QuantifierPusher]: treesize reduction 9, result has 75.0 percent of original size 27 [2021-02-22 01:51:08,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:08,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:51:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:08,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:08,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:51:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:08,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:08,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:08,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 01:51:08,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 01:51:08,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:51:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:08,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:08,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:08,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:51:08,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 01:51:08,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 01:51:08,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:51:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:08,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:08,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:51:08,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 01:51:08,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:08,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:51:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-22 01:51:08,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750281482] [2021-02-22 01:51:08,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:51:08,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-22 01:51:08,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397326908] [2021-02-22 01:51:08,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-22 01:51:08,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:51:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-22 01:51:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-22 01:51:08,826 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2021-02-22 01:51:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:51:09,749 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-02-22 01:51:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-22 01:51:09,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-02-22 01:51:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:51:09,752 INFO L225 Difference]: With dead ends: 49 [2021-02-22 01:51:09,752 INFO L226 Difference]: Without dead ends: 43 [2021-02-22 01:51:09,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-02-22 01:51:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-22 01:51:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-22 01:51:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-22 01:51:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-22 01:51:09,769 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 44 [2021-02-22 01:51:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:51:09,770 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-22 01:51:09,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-22 01:51:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-22 01:51:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-22 01:51:09,772 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:51:09,772 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-02-22 01:51:09,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:51:09,772 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:51:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:51:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1655724848, now seen corresponding path program 3 times [2021-02-22 01:51:09,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:51:09,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471704269] [2021-02-22 01:51:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:51:09,777 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:51:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:09,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:09,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:09,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:09,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:51:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:09,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:09,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:51:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:09,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:09,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:09,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:51:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:09,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:09,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:09,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:51:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:09,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:09,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:51:09,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:09,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:51:10,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:51:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:51:10,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:51:10,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:51:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-22 01:51:10,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471704269] [2021-02-22 01:51:10,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:51:10,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:51:10,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065973342] [2021-02-22 01:51:10,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:51:10,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:51:10,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:51:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:51:10,044 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 9 states. [2021-02-22 01:51:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:51:10,458 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-02-22 01:51:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:51:10,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2021-02-22 01:51:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:51:10,460 INFO L225 Difference]: With dead ends: 58 [2021-02-22 01:51:10,460 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 01:51:10,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-22 01:51:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 01:51:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 01:51:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 01:51:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 01:51:10,463 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-02-22 01:51:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:51:10,463 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 01:51:10,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:51:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 01:51:10,463 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 01:51:10,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:51:10,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 01:51:11,148 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2021-02-22 01:51:11,417 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2021-02-22 01:51:11,608 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2021-02-22 01:51:11,950 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2021-02-22 01:51:12,188 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2021-02-22 01:51:12,396 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-22 01:51:12,396 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-22 01:51:12,396 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-22 01:51:12,396 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-22 01:51:12,397 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-22 01:51:12,397 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:51:12,397 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-22 01:51:12,397 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 01:51:12,397 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-22 01:51:12,397 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|)) [2021-02-22 01:51:12,398 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-22 01:51:12,398 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-22 01:51:12,398 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:51:12,398 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:51:12,398 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:51:12,398 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 01:51:12,399 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 01:51:12,399 INFO L185 CegarLoopUtils]: At program point sumEXIT(lines 5 11) the Hoare annotation is: (let ((.cse0 (= sum_~n |sum_#in~n|)) (.cse1 (= sum_~m |sum_#in~m|))) (or (and .cse0 (<= |sum_#res| |sum_#in~m|) .cse1 (<= (+ |sum_#in~n| |sum_#in~m|) |sum_#res|)) (let ((.cse2 (+ |sum_#in~m| 2))) (and .cse0 (<= 2 |sum_#in~n|) (<= .cse2 |sum_#res|) .cse1 (<= |sum_#res| .cse2))) (let ((.cse3 (+ |sum_#in~m| 1))) (and .cse0 (<= .cse3 |sum_#res|) (<= 1 sum_~n) .cse1 (<= |sum_#res| .cse3) (<= |sum_#in~n| 1))) (and .cse0 .cse1 (<= 3 |sum_#in~n|)))) [2021-02-22 01:51:12,399 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2021-02-22 01:51:12,399 INFO L185 CegarLoopUtils]: At program point L9-1(line 9) the Hoare annotation is: (let ((.cse0 (= sum_~n |sum_#in~n|)) (.cse1 (= sum_~m |sum_#in~m|))) (or (let ((.cse2 (+ |sum_#in~m| 2))) (and .cse0 (<= 2 |sum_#in~n|) .cse1 (<= |sum_#t~ret7| .cse2) (<= .cse2 |sum_#t~ret7|))) (let ((.cse3 (+ |sum_#in~m| 1))) (and .cse0 (<= .cse3 |sum_#t~ret7|) (<= 1 sum_~n) .cse1 (<= |sum_#in~n| 1) (<= |sum_#t~ret7| .cse3))) (and .cse0 .cse1 (<= 3 |sum_#in~n|)))) [2021-02-22 01:51:12,400 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= sum_~n 0)) [2021-02-22 01:51:12,400 INFO L185 CegarLoopUtils]: At program point L9-2(line 9) the Hoare annotation is: (let ((.cse0 (= sum_~n |sum_#in~n|)) (.cse1 (= sum_~m |sum_#in~m|))) (or (let ((.cse2 (+ |sum_#in~m| 2))) (and .cse0 (<= 2 |sum_#in~n|) .cse1 (<= |sum_#t~ret7| .cse2) (<= .cse2 |sum_#t~ret7|))) (let ((.cse3 (+ |sum_#in~m| 1))) (and .cse0 (<= .cse3 |sum_#t~ret7|) (<= 1 sum_~n) .cse1 (<= |sum_#in~n| 1) (<= |sum_#t~ret7| .cse3))) (and .cse0 .cse1 (<= 3 |sum_#in~n|)))) [2021-02-22 01:51:12,400 INFO L185 CegarLoopUtils]: At program point L6(lines 6 10) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2021-02-22 01:51:12,400 INFO L185 CegarLoopUtils]: At program point L9-3(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (or (let ((.cse0 (+ |sum_#in~m| 1))) (and (<= .cse0 |sum_#t~ret7|) (<= .cse0 |sum_#res|) (<= 1 sum_~n) (<= |sum_#res| .cse0) (<= |sum_#in~n| 1) (<= |sum_#t~ret7| .cse0))) (let ((.cse1 (+ |sum_#in~m| 2))) (and (<= 2 |sum_#in~n|) (<= .cse1 |sum_#res|) (<= |sum_#t~ret7| .cse1) (<= |sum_#res| .cse1) (<= .cse1 |sum_#t~ret7|))) (<= 3 |sum_#in~n|)) (= sum_~m |sum_#in~m|)) [2021-02-22 01:51:12,401 INFO L185 CegarLoopUtils]: At program point L5(lines 5 11) the Hoare annotation is: (= sum_~n |sum_#in~n|) [2021-02-22 01:51:12,401 INFO L185 CegarLoopUtils]: At program point sumFINAL(lines 5 11) the Hoare annotation is: (let ((.cse0 (= sum_~n |sum_#in~n|)) (.cse1 (= sum_~m |sum_#in~m|))) (or (and .cse0 (<= |sum_#res| |sum_#in~m|) .cse1 (<= (+ |sum_#in~n| |sum_#in~m|) |sum_#res|)) (let ((.cse2 (+ |sum_#in~m| 2))) (and .cse0 (<= 2 |sum_#in~n|) (<= .cse2 |sum_#res|) .cse1 (<= |sum_#res| .cse2))) (let ((.cse3 (+ |sum_#in~m| 1))) (and .cse0 (<= .cse3 |sum_#res|) (<= 1 sum_~n) .cse1 (<= |sum_#res| .cse3) (<= |sum_#in~n| 1))) (and .cse0 .cse1 (<= 3 |sum_#in~n|)))) [2021-02-22 01:51:12,401 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-02-22 01:51:12,401 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) the Hoare annotation is: false [2021-02-22 01:51:12,401 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 20) the Hoare annotation is: true [2021-02-22 01:51:12,402 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 13 20) the Hoare annotation is: (= main_~a~0 2) [2021-02-22 01:51:12,402 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: false [2021-02-22 01:51:12,402 INFO L185 CegarLoopUtils]: At program point L17(lines 17 19) the Hoare annotation is: (and (<= (+ main_~a~0 main_~b~0) main_~result~0) (<= main_~result~0 (+ main_~b~0 2)) (= main_~a~0 2)) [2021-02-22 01:51:12,402 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: false [2021-02-22 01:51:12,402 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= main_~a~0 2) [2021-02-22 01:51:12,402 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (= main_~a~0 2) [2021-02-22 01:51:12,403 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~b~0 2))) (and (<= |main_#t~ret8| .cse0) (<= .cse0 |main_#t~ret8|) (= main_~a~0 2))) [2021-02-22 01:51:12,403 INFO L185 CegarLoopUtils]: At program point L17-2(lines 13 20) the Hoare annotation is: (= main_~a~0 2) [2021-02-22 01:51:12,403 INFO L185 CegarLoopUtils]: At program point L16-2(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~b~0 2))) (and (<= |main_#t~ret8| .cse0) (<= .cse0 |main_#t~ret8|) (= main_~a~0 2))) [2021-02-22 01:51:12,403 INFO L185 CegarLoopUtils]: At program point L16-3(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~b~0 2))) (and (<= (+ main_~a~0 main_~b~0) main_~result~0) (<= |main_#t~ret8| .cse0) (<= main_~result~0 .cse0) (<= .cse0 |main_#t~ret8|) (= main_~a~0 2))) [2021-02-22 01:51:12,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:51:12 BoogieIcfgContainer [2021-02-22 01:51:12,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:51:12,427 INFO L168 Benchmark]: Toolchain (without parser) took 6816.37 ms. Allocated memory was 168.8 MB in the beginning and 251.7 MB in the end (delta: 82.8 MB). Free memory was 145.4 MB in the beginning and 98.6 MB in the end (delta: 46.8 MB). Peak memory consumption was 130.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:51:12,428 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 168.8 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:51:12,429 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.96 ms. Allocated memory is still 168.8 MB. Free memory was 144.1 MB in the beginning and 135.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:51:12,429 INFO L168 Benchmark]: Boogie Preprocessor took 61.70 ms. Allocated memory is still 168.8 MB. Free memory was 135.0 MB in the beginning and 133.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:51:12,430 INFO L168 Benchmark]: RCFGBuilder took 459.75 ms. Allocated memory is still 168.8 MB. Free memory was 133.6 MB in the beginning and 120.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-22 01:51:12,431 INFO L168 Benchmark]: TraceAbstraction took 5880.86 ms. Allocated memory was 168.8 MB in the beginning and 251.7 MB in the end (delta: 82.8 MB). Free memory was 119.6 MB in the beginning and 98.6 MB in the end (delta: 21.1 MB). Peak memory consumption was 104.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:51:12,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 168.8 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 382.96 ms. Allocated memory is still 168.8 MB. Free memory was 144.1 MB in the beginning and 135.1 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.70 ms. Allocated memory is still 168.8 MB. Free memory was 135.0 MB in the beginning and 133.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 459.75 ms. Allocated memory is still 168.8 MB. Free memory was 133.6 MB in the beginning and 120.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5880.86 ms. Allocated memory was 168.8 MB in the beginning and 251.7 MB in the end (delta: 82.8 MB). Free memory was 119.6 MB in the beginning and 98.6 MB in the end (delta: 21.1 MB). Peak memory consumption was 104.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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: 5]: Procedure Contract for sum Derived contract for procedure sum: (((((n == \old(n) && \result <= \old(m)) && m == \old(m)) && \old(n) + \old(m) <= \result) || ((((n == \old(n) && 2 <= \old(n)) && \old(m) + 2 <= \result) && m == \old(m)) && \result <= \old(m) + 2)) || (((((n == \old(n) && \old(m) + 1 <= \result) && 1 <= n) && m == \old(m)) && \result <= \old(m) + 1) && \old(n) <= 1)) || ((n == \old(n) && m == \old(m)) && 3 <= \old(n)) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: a == 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.7s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 215 SDslu, 227 SDs, 0 SdLazy, 417 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 56 PreInvPairs, 119 NumberOfFragments, 465 HoareAnnotationTreeSize, 56 FomulaSimplifications, 795 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 36 FomulaSimplificationsInter, 3153 FormulaSimplificationTreeSizeReductionInter, 1.5s 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...