/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark32_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 07:58:24,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 07:58:24,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 07:58:24,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 07:58:24,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 07:58:24,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 07:58:24,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 07:58:24,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 07:58:24,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 07:58:24,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 07:58:24,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 07:58:24,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 07:58:24,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 07:58:24,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 07:58:24,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 07:58:24,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 07:58:24,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 07:58:24,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 07:58:24,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 07:58:24,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 07:58:24,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 07:58:24,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 07:58:24,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 07:58:24,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 07:58:24,451 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 07:58:24,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 07:58:24,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 07:58:24,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 07:58:24,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 07:58:24,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 07:58:24,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 07:58:24,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 07:58:24,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 07:58:24,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 07:58:24,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 07:58:24,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 07:58:24,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 07:58:24,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 07:58:24,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 07:58:24,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 07:58:24,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 07:58:24,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 07:58:24,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 07:58:24,454 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 07:58:24,454 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 07:58:24,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 07:58:24,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 07:58:24,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 07:58:24,794 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 07:58:24,796 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 07:58:24,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark32_linear.i [2021-04-16 07:58:24,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f18cf6b9/31bc6b862fe949dabc29fbbde487a420/FLAG56d6f9566 [2021-04-16 07:58:25,209 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 07:58:25,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark32_linear.i [2021-04-16 07:58:25,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f18cf6b9/31bc6b862fe949dabc29fbbde487a420/FLAG56d6f9566 [2021-04-16 07:58:25,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f18cf6b9/31bc6b862fe949dabc29fbbde487a420 [2021-04-16 07:58:25,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 07:58:25,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 07:58:25,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 07:58:25,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 07:58:25,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 07:58:25,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6446c9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25, skipping insertion in model container [2021-04-16 07:58:25,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 07:58:25,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 07:58:25,386 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark32_linear.i[868,881] [2021-04-16 07:58:25,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:58:25,398 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 07:58:25,440 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark32_linear.i[868,881] [2021-04-16 07:58:25,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:58:25,462 INFO L208 MainTranslator]: Completed translation [2021-04-16 07:58:25,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25 WrapperNode [2021-04-16 07:58:25,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 07:58:25,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 07:58:25,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 07:58:25,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 07:58:25,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (1/1) ... [2021-04-16 07:58:25,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 07:58:25,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 07:58:25,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 07:58:25,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 07:58:25,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (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 [2021-04-16 07:58:25,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 07:58:25,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 07:58:25,557 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 07:58:25,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 07:58:25,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 07:58:25,558 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 07:58:25,558 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-04-16 07:58:25,558 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-04-16 07:58:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 07:58:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 07:58:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 07:58:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-04-16 07:58:25,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 07:58:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 07:58:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 07:58:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 07:58:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 07:58:25,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 07:58:25,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 07:58:25,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 07:58:25,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 07:58:25,819 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 07:58:25,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:58:25 BoogieIcfgContainer [2021-04-16 07:58:25,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 07:58:25,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 07:58:25,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 07:58:25,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 07:58:25,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 07:58:25" (1/3) ... [2021-04-16 07:58:25,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0f093b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:58:25, skipping insertion in model container [2021-04-16 07:58:25,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:58:25" (2/3) ... [2021-04-16 07:58:25,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0f093b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:58:25, skipping insertion in model container [2021-04-16 07:58:25,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:58:25" (3/3) ... [2021-04-16 07:58:25,834 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark32_linear.i [2021-04-16 07:58:25,838 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 07:58:25,855 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 07:58:25,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 07:58:25,914 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 07:58:25,914 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 07:58:25,914 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 07:58:25,914 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 07:58:25,914 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 07:58:25,914 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 07:58:25,915 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 07:58:25,915 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 07:58:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-04-16 07:58:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 07:58:25,949 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:58:25,949 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:58:25,949 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:58:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:58:25,954 INFO L82 PathProgramCache]: Analyzing trace with hash -35238852, now seen corresponding path program 1 times [2021-04-16 07:58:25,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:58:25,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189988817] [2021-04-16 07:58:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:58:26,010 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:58:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:58:26,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:58:26,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:58:26,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:58:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:58:26,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:58:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:58:26,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189988817] [2021-04-16 07:58:26,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:58:26,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 07:58:26,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278003074] [2021-04-16 07:58:26,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 07:58:26,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:58:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 07:58:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:58:26,216 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-04-16 07:58:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:58:26,287 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-04-16 07:58:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 07:58:26,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 [2021-04-16 07:58:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:58:26,297 INFO L225 Difference]: With dead ends: 34 [2021-04-16 07:58:26,297 INFO L226 Difference]: Without dead ends: 15 [2021-04-16 07:58:26,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:58:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-04-16 07:58:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-04-16 07:58:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-04-16 07:58:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-04-16 07:58:26,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-04-16 07:58:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:58:26,341 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-04-16 07:58:26,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-04-16 07:58:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-04-16 07:58:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 07:58:26,342 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:58:26,342 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:58:26,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 07:58:26,343 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:58:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:58:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash -49091667, now seen corresponding path program 1 times [2021-04-16 07:58:26,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:58:26,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126671378] [2021-04-16 07:58:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:58:26,357 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:58:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:58:26,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,434 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:58:26,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:58:26,442 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-04-16 07:58:26,444 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:58:26,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:58:26,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:58:26,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:58:26,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:58:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:58:26,527 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:58:26,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:58:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:58:26,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126671378] [2021-04-16 07:58:26,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:58:26,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 07:58:26,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268274823] [2021-04-16 07:58:26,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 07:58:26,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:58:26,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 07:58:26,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 07:58:26,531 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. 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) [2021-04-16 07:58:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:58:26,695 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-04-16 07:58:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-16 07:58:26,696 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 [2021-04-16 07:58:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:58:26,696 INFO L225 Difference]: With dead ends: 15 [2021-04-16 07:58:26,697 INFO L226 Difference]: Without dead ends: 0 [2021-04-16 07:58:26,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-16 07:58:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-16 07:58:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-16 07:58:26,698 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) [2021-04-16 07:58:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-16 07:58:26,699 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-04-16 07:58:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:58:26,699 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-16 07:58:26,699 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) [2021-04-16 07:58:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-16 07:58:26,699 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-16 07:58:26,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 07:58:26,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-04-16 07:58:26,953 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2021-04-16 07:58:26,954 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2021-04-16 07:58:26,954 INFO L198 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-04-16 07:58:26,954 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-04-16 07:58:26,954 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)|)) [2021-04-16 07:58:26,955 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-04-16 07:58:26,955 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-04-16 07:58:26,955 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-04-16 07:58:26,955 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-04-16 07:58:26,955 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-04-16 07:58:26,955 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 19 28) the Hoare annotation is: true [2021-04-16 07:58:26,955 INFO L194 CegarLoopUtils]: At program point L23(lines 23 24) the Hoare annotation is: (or (= main_~x~0 2) (= main_~x~0 1)) [2021-04-16 07:58:26,955 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-04-16 07:58:26,956 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 19 28) the Hoare annotation is: true [2021-04-16 07:58:26,956 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 28) the Hoare annotation is: true [2021-04-16 07:58:26,956 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-04-16 07:58:26,956 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (= main_~x~0 2) (= main_~x~0 1)) [2021-04-16 07:58:26,956 INFO L194 CegarLoopUtils]: At program point L24-2(lines 22 25) the Hoare annotation is: (or (= main_~x~0 2) (= main_~x~0 1)) [2021-04-16 07:58:26,957 INFO L194 CegarLoopUtils]: At program point L22-2(lines 22 25) the Hoare annotation is: (or (= main_~x~0 2) (= main_~x~0 1)) [2021-04-16 07:58:26,957 INFO L194 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-04-16 07:58:26,957 INFO L194 CegarLoopUtils]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-04-16 07:58:26,957 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2021-04-16 07:58:26,957 INFO L201 CegarLoopUtils]: At program point L15-2(lines 14 18) the Hoare annotation is: true [2021-04-16 07:58:26,957 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 14 18) the Hoare annotation is: true [2021-04-16 07:58:26,958 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-04-16 07:58:26,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 07:58:26 BoogieIcfgContainer [2021-04-16 07:58:26,972 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 07:58:26,974 INFO L168 Benchmark]: Toolchain (without parser) took 1735.72 ms. Allocated memory is still 195.0 MB. Free memory was 160.5 MB in the beginning and 75.3 MB in the end (delta: 85.2 MB). Peak memory consumption was 85.5 MB. Max. memory is 8.0 GB. [2021-04-16 07:58:26,974 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 195.0 MB. Free memory is still 177.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 07:58:26,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.47 ms. Allocated memory is still 195.0 MB. Free memory was 160.4 MB in the beginning and 178.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-04-16 07:58:26,976 INFO L168 Benchmark]: Boogie Preprocessor took 23.22 ms. Allocated memory is still 195.0 MB. Free memory was 178.1 MB in the beginning and 176.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-16 07:58:26,977 INFO L168 Benchmark]: RCFGBuilder took 333.12 ms. Allocated memory is still 195.0 MB. Free memory was 176.5 MB in the beginning and 162.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-04-16 07:58:26,978 INFO L168 Benchmark]: TraceAbstraction took 1150.28 ms. Allocated memory is still 195.0 MB. Free memory was 162.4 MB in the beginning and 75.3 MB in the end (delta: 87.0 MB). Peak memory consumption was 87.0 MB. Max. memory is 8.0 GB. [2021-04-16 07:58:26,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 195.0 MB. Free memory is still 177.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 222.47 ms. Allocated memory is still 195.0 MB. Free memory was 160.4 MB in the beginning and 178.1 MB in the end (delta: -17.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.22 ms. Allocated memory is still 195.0 MB. Free memory was 178.1 MB in the beginning and 176.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 333.12 ms. Allocated memory is still 195.0 MB. Free memory was 176.5 MB in the beginning and 162.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1150.28 ms. Allocated memory is still 195.0 MB. Free memory was 162.4 MB in the beginning and 75.3 MB in the end (delta: 87.0 MB). Peak memory consumption was 87.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 812.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 26.4ms, AutomataDifference: 262.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 253.2ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 27 SDslu, 19 SDs, 0 SdLazy, 32 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 210.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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: 28.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 22 LocationsWithAnnotation, 28 PreInvPairs, 36 NumberOfFragments, 81 HoareAnnotationTreeSize, 28 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 39.4ms HoareSimplificationTime, 22 FomulaSimplificationsInter, 337 FormulaSimplificationTreeSizeReductionInter, 198.2ms 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: 22]: Loop Invariant Derived loop invariant: x == 2 || x == 1 - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...