/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/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:36:58,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:36:58,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:36:58,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:36:58,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:36:58,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:36:58,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:36:58,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:36:58,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:36:58,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:36:58,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:36:58,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:36:58,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:36:58,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:36:58,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:36:58,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:36:58,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:36:58,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:36:58,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:36:58,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:36:58,073 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 11:36:58,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:36:58,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:36:58,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:36:58,088 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:36:58,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:36:58,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:36:58,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:36:58,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:36:58,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:36:58,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:36:58,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:36:58,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:36:58,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:36:58,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:36:58,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:36:58,090 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:36:58,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:36:58,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:36:58,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:36:58,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:36:58,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:36:58,331 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:36:58,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2021-05-06 11:36:58,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2fe766f5/97870ff21e824565bc1dcde9d669625b/FLAGb38728cb0 [2021-05-06 11:36:58,778 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:36:58,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i [2021-05-06 11:36:58,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2fe766f5/97870ff21e824565bc1dcde9d669625b/FLAGb38728cb0 [2021-05-06 11:36:58,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2fe766f5/97870ff21e824565bc1dcde9d669625b [2021-05-06 11:36:58,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:36:58,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:36:58,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:36:58,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:36:58,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:36:58,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:58,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4388db88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58, skipping insertion in model container [2021-05-06 11:36:58,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:58,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:36:58,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:36:58,927 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2021-05-06 11:36:58,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:36:58,936 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:36:58,979 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2.i[891,904] [2021-05-06 11:36:58,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:36:58,992 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:36:58,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58 WrapperNode [2021-05-06 11:36:58,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:36:58,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:36:58,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:36:58,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:36:59,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:59,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:59,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:59,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:59,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:59,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:59,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (1/1) ... [2021-05-06 11:36:59,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:36:59,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:36:59,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:36:59,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:36:59,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (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 11:36:59,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:36:59,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:36:59,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:36:59,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:36:59,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:36:59,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:36:59,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:36:59,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:36:59,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:36:59,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:36:59,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:36:59,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:36:59,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:36:59,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:36:59,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:36:59,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:36:59,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:36:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:36:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:36:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:36:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:36:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:36:59,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:36:59,293 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:36:59,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:36:59 BoogieIcfgContainer [2021-05-06 11:36:59,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:36:59,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:36:59,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:36:59,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:36:59,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:36:58" (1/3) ... [2021-05-06 11:36:59,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59161aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:36:59, skipping insertion in model container [2021-05-06 11:36:59,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:58" (2/3) ... [2021-05-06 11:36:59,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59161aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:36:59, skipping insertion in model container [2021-05-06 11:36:59,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:36:59" (3/3) ... [2021-05-06 11:36:59,300 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2021-05-06 11:36:59,320 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:36:59,323 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:36:59,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:36:59,366 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:36:59,366 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:36:59,366 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:36:59,366 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:36:59,366 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:36:59,367 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:36:59,367 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:36:59,367 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:36:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-05-06 11:36:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:36:59,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:59,391 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:59,391 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:59,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1305738320, now seen corresponding path program 1 times [2021-05-06 11:36:59,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:59,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511111118] [2021-05-06 11:36:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:59,450 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:59,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:59,634 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 11:36:59,636 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511111118] [2021-05-06 11:36:59,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511111118] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:59,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:59,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:36:59,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964953495] [2021-05-06 11:36:59,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:36:59,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:36:59,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:36:59,653 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11:36:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:59,776 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 11:36:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:36:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-05-06 11:36:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:59,782 INFO L225 Difference]: With dead ends: 34 [2021-05-06 11:36:59,782 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 11:36:59,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:36:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 11:36:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-06 11:36:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2021-05-06 11:36:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-06 11:36:59,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-06 11:36:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:59,823 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-06 11:36:59,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11:36:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-06 11:36:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 11:36:59,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:59,824 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:59,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:36:59,824 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1786070446, now seen corresponding path program 1 times [2021-05-06 11:36:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:59,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942785658] [2021-05-06 11:36:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:59,870 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 93.5 percent of original size [2021-05-06 11:36:59,891 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:59,911 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-06 11:36:59,928 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 93.5 percent of original size 43 [2021-05-06 11:36:59,975 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:36:59,977 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:36:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:00,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:37:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:37:00,071 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 11:37:00,166 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:37:00,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942785658] [2021-05-06 11:37:00,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [942785658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:37:00,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:37:00,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:37:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908921326] [2021-05-06 11:37:00,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:37:00,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:37:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:37:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:37:00,169 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 11:37:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:37:00,358 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-05-06 11:37:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:37:00,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 13 [2021-05-06 11:37:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:37:00,359 INFO L225 Difference]: With dead ends: 15 [2021-05-06 11:37:00,359 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:37:00,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:37:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:37:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:37:00,360 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 11:37:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:37:00,361 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-05-06 11:37:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:37:00,361 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:37:00,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 11:37:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:37:00,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:37:00,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:37:00,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:37:00,653 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-06 11:37:00,654 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-06 11:37:00,655 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-06 11:37:00,656 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:37:00,656 INFO L194 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)|)) [2021-05-06 11:37:00,656 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:37:00,656 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:37:00,660 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 11:37:00,660 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:37:00,660 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:37:00,661 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-06 11:37:00,661 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-06 11:37:00,661 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-06 11:37:00,661 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-06 11:37:00,661 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 29) the Hoare annotation is: true [2021-05-06 11:37:00,661 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-06 11:37:00,661 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 24 29) the Hoare annotation is: true [2021-05-06 11:37:00,661 INFO L194 CegarLoopUtils]: At program point L26-2(line 26) the Hoare annotation is: (and (or (= main_~i~0 0) (and (= (mod main_~i~0 2) 0) (< 0 (div main_~i~0 2)))) (< main_~i~0 1000000)) [2021-05-06 11:37:00,661 INFO L194 CegarLoopUtils]: At program point L26-3(line 26) the Hoare annotation is: (or (= main_~i~0 0) (and (or (= main_~i~0 2) (and (= (mod main_~i~0 2) 0) (< 0 (div (+ main_~i~0 (- 2)) 2)))) (< main_~i~0 1000002))) [2021-05-06 11:37:00,661 INFO L194 CegarLoopUtils]: At program point L26-4(line 26) the Hoare annotation is: (and (<= main_~i~0 1000000) (< 999999 main_~i~0)) [2021-05-06 11:37:00,661 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 24 29) the Hoare annotation is: true [2021-05-06 11:37:00,661 INFO L201 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-05-06 11:37:00,662 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-06 11:37:00,662 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-05-06 11:37:00,662 INFO L194 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:37:00,662 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:37:00,662 INFO L194 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:37:00,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:37:00 BoogieIcfgContainer [2021-05-06 11:37:00,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:37:00,673 INFO L168 Benchmark]: Toolchain (without parser) took 1871.10 ms. Allocated memory is still 227.5 MB. Free memory was 192.4 MB in the beginning and 95.0 MB in the end (delta: 97.4 MB). Peak memory consumption was 98.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:37:00,674 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 227.5 MB. Free memory is still 210.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:37:00,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.85 ms. Allocated memory is still 227.5 MB. Free memory was 192.4 MB in the beginning and 211.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:37:00,677 INFO L168 Benchmark]: Boogie Preprocessor took 28.00 ms. Allocated memory is still 227.5 MB. Free memory was 211.3 MB in the beginning and 209.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:37:00,678 INFO L168 Benchmark]: RCFGBuilder took 271.13 ms. Allocated memory is still 227.5 MB. Free memory was 209.9 MB in the beginning and 196.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:37:00,678 INFO L168 Benchmark]: TraceAbstraction took 1376.87 ms. Allocated memory is still 227.5 MB. Free memory was 195.9 MB in the beginning and 95.0 MB in the end (delta: 100.9 MB). Peak memory consumption was 100.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:37:00,681 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 227.5 MB. Free memory is still 210.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 188.85 ms. Allocated memory is still 227.5 MB. Free memory was 192.4 MB in the beginning and 211.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.00 ms. Allocated memory is still 227.5 MB. Free memory was 211.3 MB in the beginning and 209.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 271.13 ms. Allocated memory is still 227.5 MB. Free memory was 209.9 MB in the beginning and 196.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1376.87 ms. Allocated memory is still 227.5 MB. Free memory was 195.9 MB in the beginning and 95.0 MB in the end (delta: 100.9 MB). Peak memory consumption was 100.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 997.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.0ms, AutomataDifference: 334.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 290.9ms, InitialAbstractionConstructionTime: 13.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 22 SDtfs, 24 SDslu, 31 SDs, 0 SdLazy, 54 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 350.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 26 PreInvPairs, 36 NumberOfFragments, 103 HoareAnnotationTreeSize, 26 FomulaSimplifications, 123 FormulaSimplificationTreeSizeReduction, 96.5ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 359 FormulaSimplificationTreeSizeReductionInter, 179.1ms 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 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: i == 0 || ((i == 2 || (i % 2 == 0 && 0 < (i + -2) / 2)) && i < 1000002) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...