/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:01:51,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:01:51,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:01:51,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:01:51,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:01:51,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:01:51,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:01:51,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:01:51,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:01:51,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:01:51,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:01:51,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:01:51,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:01:51,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:01:51,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:01:51,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:01:51,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:01:51,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:01:51,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:01:51,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:01:51,802 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:01:51,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:01:51,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:01:51,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:01:51,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:01:51,843 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:01:51,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:01:51,844 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:01:51,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:01:51,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:01:51,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:01:51,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:01:51,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:01:51,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:01:51,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:01:51,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:01:51,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:01:51,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:01:51,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:01:51,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:01:51,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:01:51,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:01:51,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:01:51,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:01:51,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:01:51,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:01:51,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:01:51,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:01:51,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:01:51,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:01:52,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:01:52,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:01:52,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:01:52,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:01:52,133 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:01:52,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c [2021-05-02 13:01:52,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e755cd9ce/a78af0a0b5f8499c98b1c5aa638e5318/FLAG0e1077d6c [2021-05-02 13:01:52,677 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:01:52,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c [2021-05-02 13:01:52,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e755cd9ce/a78af0a0b5f8499c98b1c5aa638e5318/FLAG0e1077d6c [2021-05-02 13:01:53,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e755cd9ce/a78af0a0b5f8499c98b1c5aa638e5318 [2021-05-02 13:01:53,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:01:53,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:01:53,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:01:53,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:01:53,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:01:53,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527723b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53, skipping insertion in model container [2021-05-02 13:01:53,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:01:53,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:01:53,317 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c[456,469] [2021-05-02 13:01:53,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:01:53,332 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:01:53,359 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c[456,469] [2021-05-02 13:01:53,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:01:53,375 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:01:53,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53 WrapperNode [2021-05-02 13:01:53,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:01:53,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:01:53,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:01:53,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:01:53,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (1/1) ... [2021-05-02 13:01:53,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:01:53,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:01:53,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:01:53,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:01:53,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (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 [2021-05-02 13:01:53,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:01:53,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:01:53,486 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:01:53,487 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:01:53,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:01:53,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:01:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:01:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:01:53,488 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:01:53,488 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:01:53,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:01:53,488 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:01:53,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:01:53,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:01:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:01:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:01:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:01:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:01:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:01:53,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:01:53,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:01:53,769 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:01:53,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:01:53 BoogieIcfgContainer [2021-05-02 13:01:53,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:01:53,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:01:53,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:01:53,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:01:53,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:01:53" (1/3) ... [2021-05-02 13:01:53,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215e89c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:01:53, skipping insertion in model container [2021-05-02 13:01:53,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:53" (2/3) ... [2021-05-02 13:01:53,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215e89c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:01:53, skipping insertion in model container [2021-05-02 13:01:53,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:01:53" (3/3) ... [2021-05-02 13:01:53,776 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv1.c [2021-05-02 13:01:53,781 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:01:53,784 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:01:53,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:01:53,817 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:01:53,817 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:01:53,817 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:01:53,817 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:01:53,817 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:01:53,817 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:01:53,818 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:01:53,818 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:01:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:01:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:01:53,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:53,840 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:53,840 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1965397839, now seen corresponding path program 1 times [2021-05-02 13:01:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:53,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50901607] [2021-05-02 13:01:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:54,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:54,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50901607] [2021-05-02 13:01:54,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50901607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:01:54,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:01:54,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:01:54,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761711620] [2021-05-02 13:01:54,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:01:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:54,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:01:54,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:01:54,088 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:54,329 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-02 13:01:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:01:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:01:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:54,336 INFO L225 Difference]: With dead ends: 43 [2021-05-02 13:01:54,336 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:01:54,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:01:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:01:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 13:01:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 13:01:54,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 13:01:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:54,367 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 13:01:54,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 13:01:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:01:54,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:54,368 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:54,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:01:54,369 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2050700910, now seen corresponding path program 1 times [2021-05-02 13:01:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:54,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532785832] [2021-05-02 13:01:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:54,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532785832] [2021-05-02 13:01:54,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532785832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389415676] [2021-05-02 13:01:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:01:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:01:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389415676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:54,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:54,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-02 13:01:54,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543063869] [2021-05-02 13:01:54,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:01:54,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:54,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:01:54,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:01:54,713 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:54,965 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-05-02 13:01:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:01:54,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 13:01:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:54,966 INFO L225 Difference]: With dead ends: 19 [2021-05-02 13:01:54,966 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:01:54,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:01:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:01:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:01:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:01:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:01:54,973 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-02 13:01:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:54,974 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:01:54,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:01:54,977 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:01:55,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:01:55,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:01:55,390 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-02 13:01:55,390 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-02 13:01:55,390 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-02 13:01:55,391 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:01:55,398 INFO L194 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)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#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|)) [2021-05-02 13:01:55,398 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:01:55,398 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:01:55,399 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:01:55,399 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:01:55,399 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:01:55,399 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 9 11) no Hoare annotation was computed. [2021-05-02 13:01:55,399 INFO L198 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-05-02 13:01:55,399 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2021-05-02 13:01:55,399 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2021-05-02 13:01:55,399 INFO L198 CegarLoopUtils]: For program point L32(line 32) no Hoare annotation was computed. [2021-05-02 13:01:55,400 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2021-05-02 13:01:55,400 INFO L198 CegarLoopUtils]: For program point L27(lines 27 30) no Hoare annotation was computed. [2021-05-02 13:01:55,400 INFO L194 CegarLoopUtils]: At program point L27-2(lines 25 31) the Hoare annotation is: (= main_~i~0 (* (div main_~i~0 3) 3)) [2021-05-02 13:01:55,400 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 34) no Hoare annotation was computed. [2021-05-02 13:01:55,400 INFO L198 CegarLoopUtils]: For program point L23(line 23) no Hoare annotation was computed. [2021-05-02 13:01:55,400 INFO L194 CegarLoopUtils]: At program point L25-2(lines 25 31) the Hoare annotation is: (= main_~i~0 (* (div main_~i~0 3) 3)) [2021-05-02 13:01:55,400 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 34) no Hoare annotation was computed. [2021-05-02 13:01:55,400 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 12 17) the Hoare annotation is: true [2021-05-02 13:01:55,400 INFO L198 CegarLoopUtils]: For program point L14(line 14) no Hoare annotation was computed. [2021-05-02 13:01:55,400 INFO L198 CegarLoopUtils]: For program point L13(lines 13 15) no Hoare annotation was computed. [2021-05-02 13:01:55,401 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 17) no Hoare annotation was computed. [2021-05-02 13:01:55,401 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 12 17) no Hoare annotation was computed. [2021-05-02 13:01:55,401 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 13:01:55,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:01:55 BoogieIcfgContainer [2021-05-02 13:01:55,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:01:55,419 INFO L168 Benchmark]: Toolchain (without parser) took 2234.70 ms. Allocated memory is still 181.4 MB. Free memory was 145.5 MB in the beginning and 89.6 MB in the end (delta: 55.9 MB). Peak memory consumption was 56.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:01:55,420 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 181.4 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:01:55,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.52 ms. Allocated memory is still 181.4 MB. Free memory was 145.3 MB in the beginning and 164.5 MB in the end (delta: -19.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:01:55,422 INFO L168 Benchmark]: Boogie Preprocessor took 34.83 ms. Allocated memory is still 181.4 MB. Free memory was 164.5 MB in the beginning and 163.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:01:55,424 INFO L168 Benchmark]: RCFGBuilder took 359.17 ms. Allocated memory is still 181.4 MB. Free memory was 163.0 MB in the beginning and 148.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:01:55,424 INFO L168 Benchmark]: TraceAbstraction took 1641.89 ms. Allocated memory is still 181.4 MB. Free memory was 148.3 MB in the beginning and 89.6 MB in the end (delta: 58.7 MB). Peak memory consumption was 59.2 MB. Max. memory is 8.0 GB. [2021-05-02 13:01:55,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 181.4 MB. Free memory is still 162.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 192.52 ms. Allocated memory is still 181.4 MB. Free memory was 145.3 MB in the beginning and 164.5 MB in the end (delta: -19.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.83 ms. Allocated memory is still 181.4 MB. Free memory was 164.5 MB in the beginning and 163.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 359.17 ms. Allocated memory is still 181.4 MB. Free memory was 163.0 MB in the beginning and 148.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1641.89 ms. Allocated memory is still 181.4 MB. Free memory was 148.3 MB in the beginning and 89.6 MB in the end (delta: 58.7 MB). Peak memory consumption was 59.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1378.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.6ms, AutomataDifference: 520.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 195.4ms, InitialAbstractionConstructionTime: 14.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 41 SDslu, 56 SDs, 0 SdLazy, 126 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 143.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 413.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 15 NumberOfFragments, 52 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 53.4ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 335 FormulaSimplificationTreeSizeReductionInter, 134.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 16.3ms SsaConstructionTime, 93.7ms SatisfiabilityAnalysisTime, 367.2ms InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 147 SizeOfPredicates, 1 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: i == i / 3 * 3 RESULT: Ultimate proved your program to be correct! Received shutdown request...