/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:58:49,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:58:49,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:58:49,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:58:49,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:58:49,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:58:49,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:58:49,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:58:49,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:58:49,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:58:49,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:58:49,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:58:49,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:58:49,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:58:49,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:58:49,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:58:49,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:58:49,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:58:49,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:58:49,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:58:49,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:58:49,647 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:58:49,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:58:49,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:58:49,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:58:49,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:58:49,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:58:49,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:58:49,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:58:49,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:58:49,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:58:49,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:58:49,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:58:49,651 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:58:49,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:58:49,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:58:49,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:58:49,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:58:49,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:58:49,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:58:49,652 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:58:50,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:58:50,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:58:50,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:58:50,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:58:50,110 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:58:50,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2021-02-23 22:58:50,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f526718/a63c0e0430254be6bc1df574492d09ac/FLAGe6db448d4 [2021-02-23 22:58:50,886 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:58:50,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2021-02-23 22:58:50,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f526718/a63c0e0430254be6bc1df574492d09ac/FLAGe6db448d4 [2021-02-23 22:58:51,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f526718/a63c0e0430254be6bc1df574492d09ac [2021-02-23 22:58:51,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:58:51,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:58:51,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:58:51,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:58:51,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:58:51,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79977568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51, skipping insertion in model container [2021-02-23 22:58:51,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:58:51,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:58:51,593 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] [2021-02-23 22:58:51,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:58:51,610 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:58:51,629 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] [2021-02-23 22:58:51,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:58:51,648 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:58:51,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51 WrapperNode [2021-02-23 22:58:51,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:58:51,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:58:51,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:58:51,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:58:51,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... [2021-02-23 22:58:51,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:58:51,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:58:51,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:58:51,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:58:51,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:58:51,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:58:51,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:58:51,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:58:51,817 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-02-23 22:58:51,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:58:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:58:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:58:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:58:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:58:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-02-23 22:58:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:58:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:58:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:58:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:58:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:58:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:58:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:58:52,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:58:52,200 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 22:58:52,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:58:52 BoogieIcfgContainer [2021-02-23 22:58:52,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:58:52,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:58:52,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:58:52,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:58:52,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:58:51" (1/3) ... [2021-02-23 22:58:52,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397551f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:58:52, skipping insertion in model container [2021-02-23 22:58:52,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:51" (2/3) ... [2021-02-23 22:58:52,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397551f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:58:52, skipping insertion in model container [2021-02-23 22:58:52,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:58:52" (3/3) ... [2021-02-23 22:58:52,215 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2021-02-23 22:58:52,224 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:58:52,230 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:58:52,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:58:52,309 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:58:52,309 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:58:52,309 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:58:52,310 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:58:52,310 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:58:52,310 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:58:52,310 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:58:52,311 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:58:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-23 22:58:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 22:58:52,368 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:58:52,369 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] [2021-02-23 22:58:52,370 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:58:52,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:58:52,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133070, now seen corresponding path program 1 times [2021-02-23 22:58:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:58:52,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148606597] [2021-02-23 22:58:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:58:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:52,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:52,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:52,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:52,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:52,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:52,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:52,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:58:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:53,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:53,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:58:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:53,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:53,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:58:53,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:58:53,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148606597] [2021-02-23 22:58:53,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:58:53,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 22:58:53,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388830565] [2021-02-23 22:58:53,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 22:58:53,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:58:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 22:58:53,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:58:53,262 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2021-02-23 22:58:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:58:53,710 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-02-23 22:58:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:58:53,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-23 22:58:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:58:53,725 INFO L225 Difference]: With dead ends: 48 [2021-02-23 22:58:53,726 INFO L226 Difference]: Without dead ends: 33 [2021-02-23 22:58:53,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:58:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-23 22:58:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-23 22:58:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-23 22:58:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-23 22:58:53,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-02-23 22:58:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:58:53,802 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-23 22:58:53,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 22:58:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-23 22:58:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 22:58:53,804 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:58:53,805 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] [2021-02-23 22:58:53,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:58:53,807 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:58:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:58:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1822905144, now seen corresponding path program 1 times [2021-02-23 22:58:53,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:58:53,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555615735] [2021-02-23 22:58:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:58:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:53,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:53,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:53,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:53,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:58:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:53,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:53,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:53,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:58:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:54,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:54,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:54,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:54,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:54,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:58:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:54,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:54,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:54,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:54,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:58:54,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:54,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-23 22:58:54,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555615735] [2021-02-23 22:58:54,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:58:54,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 22:58:54,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236423019] [2021-02-23 22:58:54,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:58:54,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:58:54,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:58:54,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:58:54,187 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-23 22:58:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:58:54,762 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-02-23 22:58:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 22:58:54,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-23 22:58:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:58:54,766 INFO L225 Difference]: With dead ends: 44 [2021-02-23 22:58:54,767 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 22:58:54,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:58:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 22:58:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-23 22:58:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 22:58:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-23 22:58:54,789 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-02-23 22:58:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:58:54,790 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-23 22:58:54,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:58:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-23 22:58:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 22:58:54,793 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:58:54,793 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] [2021-02-23 22:58:54,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:58:54,794 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:58:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:58:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1004193542, now seen corresponding path program 2 times [2021-02-23 22:58:54,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:58:54,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693000775] [2021-02-23 22:58:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:58:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:54,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:54,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:54,877 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 22:58:54,878 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 22:58:54,887 WARN L141 QuantifierPusher]: treesize reduction 2, result has 87.5 percent of original size [2021-02-23 22:58:54,889 WARN L147 QuantifierPusher]: treesize reduction 2, result has 87.5 percent of original size 14 [2021-02-23 22:58:54,916 WARN L141 QuantifierPusher]: treesize reduction 9, result has 75.0 percent of original size [2021-02-23 22:58:54,919 WARN L147 QuantifierPusher]: treesize reduction 9, result has 75.0 percent of original size 27 [2021-02-23 22:58:54,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:54,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:55,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:58:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:55,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:55,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:58:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:55,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:55,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:55,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 22:58:55,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 22:58:55,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:58:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:55,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:55,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:55,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:58:55,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 22:58:55,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 22:58:55,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:58:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:55,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:55,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:58:55,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:58:55,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:55,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:58:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 22:58:55,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693000775] [2021-02-23 22:58:55,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:58:55,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 22:58:55,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937616687] [2021-02-23 22:58:55,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 22:58:55,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:58:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 22:58:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:58:55,366 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2021-02-23 22:58:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:58:56,468 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-02-23 22:58:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 22:58:56,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-02-23 22:58:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:58:56,470 INFO L225 Difference]: With dead ends: 49 [2021-02-23 22:58:56,471 INFO L226 Difference]: Without dead ends: 43 [2021-02-23 22:58:56,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-02-23 22:58:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-23 22:58:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-23 22:58:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-23 22:58:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-23 22:58:56,489 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 44 [2021-02-23 22:58:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:58:56,490 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-23 22:58:56,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 22:58:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-23 22:58:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 22:58:56,492 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:58:56,492 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] [2021-02-23 22:58:56,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 22:58:56,493 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:58:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:58:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1655724848, now seen corresponding path program 3 times [2021-02-23 22:58:56,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:58:56,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968677905] [2021-02-23 22:58:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:58:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:56,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:56,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:56,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:56,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:58:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:56,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:56,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:58:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:56,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:56,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:56,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:58:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:56,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:56,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:56,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:58:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:56,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:56,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:58:56,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:58:56,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:58:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:58:56,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:58:56,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:58:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-23 22:58:56,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968677905] [2021-02-23 22:58:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:58:56,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-23 22:58:56,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001494885] [2021-02-23 22:58:56,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:58:56,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:58:56,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:58:56,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:58:56,804 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 9 states. [2021-02-23 22:58:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:58:57,277 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-02-23 22:58:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 22:58:57,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2021-02-23 22:58:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:58:57,279 INFO L225 Difference]: With dead ends: 58 [2021-02-23 22:58:57,279 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 22:58:57,280 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 [2021-02-23 22:58:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 22:58:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 22:58:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 22:58:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 22:58:57,281 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-02-23 22:58:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:58:57,282 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 22:58:57,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:58:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 22:58:57,282 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 22:58:57,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 22:58:57,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 22:58:57,882 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2021-02-23 22:58:58,217 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2021-02-23 22:58:58,426 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2021-02-23 22:58:58,743 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2021-02-23 22:58:58,967 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2021-02-23 22:58:59,168 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 22:58:59,168 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 22:58:59,168 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 22:58:59,169 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 22:58:59,169 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 22:58:59,169 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:58:59,169 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 22:58:59,169 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 22:58:59,169 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 22:58:59,170 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 22:58:59,170 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 22:58:59,170 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 22:58:59,171 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:58:59,171 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:58:59,171 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:58:59,171 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 22:58:59,171 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 22:58:59,172 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|)))) [2021-02-23 22:58:59,172 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|)) [2021-02-23 22:58:59,172 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|)))) [2021-02-23 22:58:59,173 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)) [2021-02-23 22:58:59,173 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|)))) [2021-02-23 22:58:59,173 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|)) [2021-02-23 22:58:59,173 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|)) [2021-02-23 22:58:59,174 INFO L185 CegarLoopUtils]: At program point L5(lines 5 11) the Hoare annotation is: (= sum_~n |sum_#in~n|) [2021-02-23 22:58:59,174 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|)))) [2021-02-23 22:58:59,174 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-02-23 22:58:59,174 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) the Hoare annotation is: false [2021-02-23 22:58:59,175 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 20) the Hoare annotation is: true [2021-02-23 22:58:59,175 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 13 20) the Hoare annotation is: (= main_~a~0 2) [2021-02-23 22:58:59,175 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: false [2021-02-23 22:58:59,175 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)) [2021-02-23 22:58:59,175 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: false [2021-02-23 22:58:59,175 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= main_~a~0 2) [2021-02-23 22:58:59,175 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (= main_~a~0 2) [2021-02-23 22:58:59,176 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))) [2021-02-23 22:58:59,176 INFO L185 CegarLoopUtils]: At program point L17-2(lines 13 20) the Hoare annotation is: (= main_~a~0 2) [2021-02-23 22:58:59,176 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))) [2021-02-23 22:58:59,176 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))) [2021-02-23 22:58:59,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:58:59 BoogieIcfgContainer [2021-02-23 22:58:59,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:58:59,209 INFO L168 Benchmark]: Toolchain (without parser) took 7901.31 ms. Allocated memory was 160.4 MB in the beginning and 242.2 MB in the end (delta: 81.8 MB). Free memory was 136.9 MB in the beginning and 175.0 MB in the end (delta: -38.1 MB). Peak memory consumption was 134.3 MB. Max. memory is 8.0 GB. [2021-02-23 22:58:59,211 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 134.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:58:59,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.14 ms. Allocated memory is still 160.4 MB. Free memory was 135.8 MB in the beginning and 126.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:58:59,219 INFO L168 Benchmark]: Boogie Preprocessor took 39.18 ms. Allocated memory is still 160.4 MB. Free memory was 126.6 MB in the beginning and 125.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:58:59,220 INFO L168 Benchmark]: RCFGBuilder took 511.49 ms. Allocated memory is still 160.4 MB. Free memory was 125.1 MB in the beginning and 111.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 22:58:59,221 INFO L168 Benchmark]: TraceAbstraction took 6998.63 ms. Allocated memory was 160.4 MB in the beginning and 242.2 MB in the end (delta: 81.8 MB). Free memory was 111.1 MB in the beginning and 175.0 MB in the end (delta: -63.9 MB). Peak memory consumption was 109.2 MB. Max. memory is 8.0 GB. [2021-02-23 22:58:59,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 160.4 MB. Free memory is still 134.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.14 ms. Allocated memory is still 160.4 MB. Free memory was 135.8 MB in the beginning and 126.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.18 ms. Allocated memory is still 160.4 MB. Free memory was 126.6 MB in the beginning and 125.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 511.49 ms. Allocated memory is still 160.4 MB. Free memory was 125.1 MB in the beginning and 111.4 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6998.63 ms. Allocated memory was 160.4 MB in the beginning and 242.2 MB in the end (delta: 81.8 MB). Free memory was 111.1 MB in the beginning and 175.0 MB in the end (delta: -63.9 MB). Peak memory consumption was 109.2 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: 4.9s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 215 SDslu, 227 SDs, 0 SdLazy, 417 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.1s 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, 0.2s HoareSimplificationTime, 36 FomulaSimplificationsInter, 3153 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 24115 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 49/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...