/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/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:07,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:07,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:07,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:07,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:07,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:07,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:07,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:07,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:07,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:07,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:07,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:07,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:07,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:07,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:07,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:07,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:07,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:07,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:07,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:07,216 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 02:21:07,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:07,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:07,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:07,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:07,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:07,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:07,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:07,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:07,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:07,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:07,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:07,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:07,234 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:07,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:07,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:07,234 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:07,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:07,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:07,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:07,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:07,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:07,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:07,236 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:07,236 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:07,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:07,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:07,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:07,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:07,648 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:07,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2021-02-22 02:21:07,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319b5c15b/fa2077d865e341cd801e38a485b91193/FLAGcbb8b2c2a [2021-02-22 02:21:08,335 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:08,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2021-02-22 02:21:08,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319b5c15b/fa2077d865e341cd801e38a485b91193/FLAGcbb8b2c2a [2021-02-22 02:21:08,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319b5c15b/fa2077d865e341cd801e38a485b91193 [2021-02-22 02:21:08,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:08,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:08,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:08,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:08,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:08,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:08" (1/1) ... [2021-02-22 02:21:08,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3a430c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:08, skipping insertion in model container [2021-02-22 02:21:08,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:08" (1/1) ... [2021-02-22 02:21:08,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:08,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:08,950 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2021-02-22 02:21:08,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:08,974 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:08,990 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2021-02-22 02:21:08,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:09,010 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:09,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09 WrapperNode [2021-02-22 02:21:09,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:09,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:09,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:09,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:09,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (1/1) ... [2021-02-22 02:21:09,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (1/1) ... [2021-02-22 02:21:09,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (1/1) ... [2021-02-22 02:21:09,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (1/1) ... [2021-02-22 02:21:09,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (1/1) ... [2021-02-22 02:21:09,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (1/1) ... [2021-02-22 02:21:09,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (1/1) ... [2021-02-22 02:21:09,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:09,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:09,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:09,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:09,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (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 02:21:09,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:09,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:09,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:09,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:09,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:21:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:21:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:09,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:09,377 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:09,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:09 BoogieIcfgContainer [2021-02-22 02:21:09,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:09,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:09,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:09,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:09,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:08" (1/3) ... [2021-02-22 02:21:09,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eeddf8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:09, skipping insertion in model container [2021-02-22 02:21:09,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:09" (2/3) ... [2021-02-22 02:21:09,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eeddf8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:09, skipping insertion in model container [2021-02-22 02:21:09,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:09" (3/3) ... [2021-02-22 02:21:09,390 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2021-02-22 02:21:09,399 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:09,404 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:09,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:09,514 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:09,514 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:09,514 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:09,514 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:09,514 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:09,515 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:09,515 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:09,515 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-22 02:21:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-22 02:21:09,547 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:09,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:09,549 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:09,556 INFO L82 PathProgramCache]: Analyzing trace with hash 550983864, now seen corresponding path program 1 times [2021-02-22 02:21:09,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:09,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15284566] [2021-02-22 02:21:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:09,647 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:09,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:09,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:09,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:09,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:09,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:09,887 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 02:21:09,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15284566] [2021-02-22 02:21:09,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:09,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:21:09,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997378073] [2021-02-22 02:21:09,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:21:09,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:21:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:21:09,920 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2021-02-22 02:21:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:10,073 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-02-22 02:21:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:21:10,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-22 02:21:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:10,085 INFO L225 Difference]: With dead ends: 46 [2021-02-22 02:21:10,085 INFO L226 Difference]: Without dead ends: 28 [2021-02-22 02:21:10,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:21:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-22 02:21:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-02-22 02:21:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-22 02:21:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-02-22 02:21:10,145 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2021-02-22 02:21:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:10,145 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-02-22 02:21:10,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:21:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-02-22 02:21:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-22 02:21:10,147 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:10,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:10,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:10,148 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash -861903488, now seen corresponding path program 1 times [2021-02-22 02:21:10,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:10,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259672279] [2021-02-22 02:21:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:10,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:21:10,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:21:10,216 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:10,233 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:10,239 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:10,243 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:10,244 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:21:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:10,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:10,373 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-22 02:21:10,374 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-22 02:21:10,383 WARN L141 QuantifierPusher]: treesize reduction 3, result has 76.9 percent of original size [2021-02-22 02:21:10,386 WARN L147 QuantifierPusher]: treesize reduction 3, result has 76.9 percent of original size 10 [2021-02-22 02:21:10,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:10,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:10,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,495 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 02:21:10,507 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.7 percent of original size [2021-02-22 02:21:10,511 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.7 percent of original size 38 [2021-02-22 02:21:10,572 WARN L141 QuantifierPusher]: treesize reduction 3, result has 82.4 percent of original size [2021-02-22 02:21:10,579 WARN L147 QuantifierPusher]: treesize reduction 3, result has 82.4 percent of original size 14 [2021-02-22 02:21:10,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:10,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:21:10,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-22 02:21:10,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:10,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259672279] [2021-02-22 02:21:10,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:10,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-22 02:21:10,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682625473] [2021-02-22 02:21:10,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-22 02:21:10,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-22 02:21:10,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-02-22 02:21:10,757 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2021-02-22 02:21:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:11,260 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-02-22 02:21:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 02:21:11,261 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-02-22 02:21:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:11,261 INFO L225 Difference]: With dead ends: 26 [2021-02-22 02:21:11,262 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 02:21:11,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-02-22 02:21:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 02:21:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 02:21:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 02:21:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 02:21:11,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-02-22 02:21:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:11,265 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 02:21:11,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-22 02:21:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 02:21:11,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 02:21:11,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:11,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 02:21:11,681 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-22 02:21:11,681 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-22 02:21:11,681 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-22 02:21:11,681 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-22 02:21:11,681 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-22 02:21:11,682 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:11,682 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:11,682 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-22 02:21:11,682 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-22 02:21:11,682 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-22 02:21:11,682 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-22 02:21:11,683 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-22 02:21:11,683 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-22 02:21:11,683 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:21:11,683 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:21:11,683 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:11,683 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 02:21:11,684 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 02:21:11,684 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2021-02-22 02:21:11,684 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (= (* main_~i~0 2) (+ main_~sn~0 2)))) (or (and (= main_~sn~0 0) .cse0) (and (<= 2 main_~i~0) (<= main_~i~0 8) .cse0))) [2021-02-22 02:21:11,684 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 22 28) the Hoare annotation is: true [2021-02-22 02:21:11,684 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (= main_~sn~0 0) [2021-02-22 02:21:11,684 INFO L192 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-02-22 02:21:11,685 INFO L185 CegarLoopUtils]: At program point L24-3(lines 24 26) the Hoare annotation is: (and (<= main_~i~0 8) (= (* main_~i~0 2) main_~sn~0) (<= 1 main_~i~0)) [2021-02-22 02:21:11,685 INFO L185 CegarLoopUtils]: At program point L24-4(line 24) the Hoare annotation is: (and (<= main_~i~0 8) (= (* main_~i~0 2) main_~sn~0) (<= 1 main_~i~0) (= |main_#t~post3| main_~i~0)) [2021-02-22 02:21:11,685 INFO L185 CegarLoopUtils]: At program point L24-5(line 24) the Hoare annotation is: (and (<= |main_#t~post3| 8) (= (* |main_#t~post3| 2) main_~sn~0) (<= 1 |main_#t~post3|) (= (+ |main_#t~post3| 1) main_~i~0)) [2021-02-22 02:21:11,685 INFO L185 CegarLoopUtils]: At program point L24-6(lines 24 26) the Hoare annotation is: (let ((.cse0 (= (* main_~i~0 2) (+ main_~sn~0 2)))) (or (and (<= 2 main_~i~0) .cse0 (<= main_~i~0 9)) (and .cse0 (= main_~i~0 1)))) [2021-02-22 02:21:11,686 INFO L185 CegarLoopUtils]: At program point L24-7(lines 24 26) the Hoare annotation is: (and (= (* main_~i~0 2) (+ main_~sn~0 2)) (= 16 main_~sn~0)) [2021-02-22 02:21:11,686 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 22 28) the Hoare annotation is: true [2021-02-22 02:21:11,686 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:21:11,686 INFO L185 CegarLoopUtils]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-22 02:21:11,686 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:21:11,686 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2021-02-22 02:21:11,687 INFO L192 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-02-22 02:21:11,687 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2021-02-22 02:21:11,687 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-22 02:21:11,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:11 BoogieIcfgContainer [2021-02-22 02:21:11,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:11,707 INFO L168 Benchmark]: Toolchain (without parser) took 3001.85 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 127.9 MB in the beginning and 103.5 MB in the end (delta: 24.4 MB). Peak memory consumption was 59.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:11,708 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 101.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:11,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:11,710 INFO L168 Benchmark]: Boogie Preprocessor took 36.48 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:11,711 INFO L168 Benchmark]: RCFGBuilder took 330.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 102.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:11,712 INFO L168 Benchmark]: TraceAbstraction took 2323.55 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 102.3 MB in the beginning and 103.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:11,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 101.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 289.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.48 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 330.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 102.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2323.55 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 102.3 MB in the beginning and 103.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((2 <= i && i * 2 == sn + 2) && i <= 9) || (i * 2 == sn + 2 && i == 1) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 41 SDslu, 92 SDs, 0 SdLazy, 105 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, 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, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 38 PreInvPairs, 47 NumberOfFragments, 171 HoareAnnotationTreeSize, 38 FomulaSimplifications, 216 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 445 FormulaSimplificationTreeSizeReductionInter, 0.2s 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...