/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/trex04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:20:32,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:20:32,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:20:32,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:20:32,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:20:32,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:20:32,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:20:32,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:20:32,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:20:32,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:20:32,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:20:32,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:20:32,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:20:32,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:20:32,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:20:32,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:20:32,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:20:32,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:20:32,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:20:32,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:20:32,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:20:32,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:20:32,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:20:32,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:20:32,929 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:20:32,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:20:32,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:20:32,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:20:32,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:20:32,931 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:20:32,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:20:33,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:20:33,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:20:33,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:20:33,185 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:20:33,186 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:20:33,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex04.c [2021-05-06 11:20:33,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3e12331/b7e33c3f0e7b49b4835ee455485cda12/FLAGfba4a900a [2021-05-06 11:20:33,639 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:20:33,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c [2021-05-06 11:20:33,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3e12331/b7e33c3f0e7b49b4835ee455485cda12/FLAGfba4a900a [2021-05-06 11:20:33,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3e12331/b7e33c3f0e7b49b4835ee455485cda12 [2021-05-06 11:20:33,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:20:33,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:20:33,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:20:33,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:20:33,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:20:33,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468d5f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33, skipping insertion in model container [2021-05-06 11:20:33,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:20:33,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:20:33,796 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/trex04.c[405,418] [2021-05-06 11:20:33,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:20:33,814 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:20:33,838 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/trex04.c[405,418] [2021-05-06 11:20:33,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:20:33,874 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:20:33,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33 WrapperNode [2021-05-06 11:20:33,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:20:33,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:20:33,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:20:33,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:20:33,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (1/1) ... [2021-05-06 11:20:33,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:20:33,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:20:33,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:20:33,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:20:33,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (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 [2021-05-06 11:20:33,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:20:33,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:20:33,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:20:33,994 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:20:33,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:20:33,994 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-05-06 11:20:33,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:20:33,994 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:20:33,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:20:33,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:20:33,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:20:33,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:20:33,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:20:33,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-06 11:20:33,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:20:33,996 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-05-06 11:20:33,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:20:33,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:20:33,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:20:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:20:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:20:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:20:33,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:20:34,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:20:34,163 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:20:34,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:20:34 BoogieIcfgContainer [2021-05-06 11:20:34,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:20:34,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:20:34,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:20:34,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:20:34,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:20:33" (1/3) ... [2021-05-06 11:20:34,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64966ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:20:34, skipping insertion in model container [2021-05-06 11:20:34,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:20:33" (2/3) ... [2021-05-06 11:20:34,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64966ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:20:34, skipping insertion in model container [2021-05-06 11:20:34,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:20:34" (3/3) ... [2021-05-06 11:20:34,168 INFO L111 eAbstractionObserver]: Analyzing ICFG trex04.c [2021-05-06 11:20:34,172 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:20:34,174 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:20:34,184 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:20:34,197 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:20:34,197 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:20:34,198 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:20:34,198 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:20:34,198 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:20:34,198 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:20:34,198 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:20:34,198 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:20:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 11:20:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:20:34,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:20:34,211 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:20:34,212 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:20:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:20:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1661240883, now seen corresponding path program 1 times [2021-05-06 11:20:34,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:20:34,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897115156] [2021-05-06 11:20:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:20:34,258 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:20:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:20:34,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:20:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:20:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:20:34,372 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:20:34,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897115156] [2021-05-06 11:20:34,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897115156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:20:34,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:20:34,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:20:34,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018651963] [2021-05-06 11:20:34,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:20:34,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:20:34,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:20:34,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:20:34,386 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-05-06 11:20:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:20:34,432 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-06 11:20:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:20:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2021-05-06 11:20:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:20:34,438 INFO L225 Difference]: With dead ends: 42 [2021-05-06 11:20:34,438 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 11:20:34,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:20:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 11:20:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 11:20:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:20:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-05-06 11:20:34,469 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 17 [2021-05-06 11:20:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:20:34,469 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-05-06 11:20:34,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-05-06 11:20:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-05-06 11:20:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:20:34,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:20:34,471 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:20:34,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:20:34,471 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:20:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:20:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1664934967, now seen corresponding path program 1 times [2021-05-06 11:20:34,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:20:34,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037473634] [2021-05-06 11:20:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:20:34,475 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:20:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:20:34,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:20:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:20:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:20:34,555 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:20:34,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037473634] [2021-05-06 11:20:34,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037473634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:20:34,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:20:34,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:20:34,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928384250] [2021-05-06 11:20:34,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:20:34,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:20:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:20:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:20:34,557 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-05-06 11:20:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:20:34,697 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-05-06 11:20:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:20:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-05-06 11:20:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:20:34,698 INFO L225 Difference]: With dead ends: 25 [2021-05-06 11:20:34,698 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:20:34,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:20:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:20:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:20:34,700 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) [2021-05-06 11:20:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:20:34,700 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-05-06 11:20:34,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:20:34,700 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:20:34,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-05-06 11:20:34,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:20:34,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:20:34,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:20:34,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:20:34,865 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 11:20:34,865 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 11:20:34,865 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 11:20:34,865 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:20:34,865 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)|) (= |#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|)) [2021-05-06 11:20:34,865 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:20:34,865 INFO L201 CegarLoopUtils]: At program point fooEXIT(lines 18 25) the Hoare annotation is: true [2021-05-06 11:20:34,865 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 11:20:34,865 INFO L201 CegarLoopUtils]: At program point L23-1(lines 18 25) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point fooENTRY(lines 18 25) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point L22-2(lines 19 25) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2021-05-06 11:20:34,866 INFO L198 CegarLoopUtils]: For program point L6(line 6) no Hoare annotation was computed. [2021-05-06 11:20:34,866 INFO L198 CegarLoopUtils]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2021-05-06 11:20:34,866 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point L35-2(line 35) the Hoare annotation is: true [2021-05-06 11:20:34,866 INFO L201 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 27 48) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 27 48) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point L42-1(lines 28 48) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 45) the Hoare annotation is: (<= main_~x~0 0) [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point L34-2(lines 28 48) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 27 48) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point L39-3(lines 28 48) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2021-05-06 11:20:34,867 INFO L194 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:20:34,868 INFO L194 CegarLoopUtils]: At program point L10(lines 10 12) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:20:34,868 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 9 14) the Hoare annotation is: true [2021-05-06 11:20:34,868 INFO L201 CegarLoopUtils]: At program point L10-2(lines 9 14) the Hoare annotation is: true [2021-05-06 11:20:34,868 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:20:34,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:20:34 BoogieIcfgContainer [2021-05-06 11:20:34,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:20:34,875 INFO L168 Benchmark]: Toolchain (without parser) took 1212.77 ms. Allocated memory is still 173.0 MB. Free memory was 138.3 MB in the beginning and 131.6 MB in the end (delta: 6.7 MB). Peak memory consumption was 84.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:20:34,875 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 173.0 MB. Free memory is still 155.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:20:34,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.80 ms. Allocated memory is still 173.0 MB. Free memory was 138.0 MB in the beginning and 156.2 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:20:34,876 INFO L168 Benchmark]: Boogie Preprocessor took 32.48 ms. Allocated memory is still 173.0 MB. Free memory was 156.2 MB in the beginning and 154.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:20:34,876 INFO L168 Benchmark]: RCFGBuilder took 255.92 ms. Allocated memory is still 173.0 MB. Free memory was 154.6 MB in the beginning and 137.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:20:34,877 INFO L168 Benchmark]: TraceAbstraction took 709.34 ms. Allocated memory is still 173.0 MB. Free memory was 137.8 MB in the beginning and 131.6 MB in the end (delta: 6.2 MB). Peak memory consumption was 83.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:20:34,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 173.0 MB. Free memory is still 155.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 208.80 ms. Allocated memory is still 173.0 MB. Free memory was 138.0 MB in the beginning and 156.2 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.48 ms. Allocated memory is still 173.0 MB. Free memory was 156.2 MB in the beginning and 154.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.92 ms. Allocated memory is still 173.0 MB. Free memory was 154.6 MB in the beginning and 137.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 709.34 ms. Allocated memory is still 173.0 MB. Free memory was 137.8 MB in the beginning and 131.6 MB in the end (delta: 6.2 MB). Peak memory consumption was 83.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: 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 7 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 505.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.6ms, AutomataDifference: 206.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 163.0ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 61 SDtfs, 47 SDslu, 25 SDs, 0 SdLazy, 77 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 31 LocationsWithAnnotation, 42 PreInvPairs, 49 NumberOfFragments, 74 HoareAnnotationTreeSize, 42 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 69.6ms HoareSimplificationTime, 31 FomulaSimplificationsInter, 682 FormulaSimplificationTreeSizeReductionInter, 84.6ms 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 18]: Procedure Contract for foo Derived contract for procedure foo: 1 - ProcedureContractResult [Line: 27]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...