/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:47:27,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:47:27,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:47:27,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:47:27,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:47:27,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:47:27,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:47:27,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:47:27,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:47:27,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:47:27,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:47:27,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:47:27,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:47:27,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:47:27,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:47:27,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:47:27,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:47:27,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:47:27,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:47:27,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:47:27,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:47:27,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:47:27,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:47:27,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:47:27,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:47:27,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:47:27,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:47:27,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:47:27,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:47:27,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:47:27,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:47:27,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:47:27,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:47:27,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:47:27,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:47:27,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:47:27,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:47:27,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:47:27,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:47:27,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:47:27,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:47:27,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:47:27,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:47:27,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:47:27,835 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:47:27,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:47:27,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:47:27,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:27,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:47:27,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:47:27,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:47:27,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:47:28,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:47:28,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:47:28,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:47:28,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:47:28,257 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:47:28,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-10-23 21:47:28,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726dc3c7e/107f215a0e5f44b0939f7e5e83e7c353/FLAG8cbb75440 [2020-10-23 21:47:28,932 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:47:28,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-10-23 21:47:28,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726dc3c7e/107f215a0e5f44b0939f7e5e83e7c353/FLAG8cbb75440 [2020-10-23 21:47:29,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/726dc3c7e/107f215a0e5f44b0939f7e5e83e7c353 [2020-10-23 21:47:29,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:47:29,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:47:29,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:29,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:47:29,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:47:29,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@797de4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29, skipping insertion in model container [2020-10-23 21:47:29,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:47:29,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:47:29,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:29,621 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:47:29,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:29,664 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:47:29,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29 WrapperNode [2020-10-23 21:47:29,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:29,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:47:29,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:47:29,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:47:29,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (1/1) ... [2020-10-23 21:47:29,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:47:29,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:47:29,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:47:29,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:47:29,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (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 [2020-10-23 21:47:29,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:47:29,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:47:29,840 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:47:29,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:47:29,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:47:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:47:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:47:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:47:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:47:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-10-23 21:47:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:47:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:47:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:47:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:47:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:47:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:47:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:47:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:47:30,327 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:47:30,328 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:47:30,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:30 BoogieIcfgContainer [2020-10-23 21:47:30,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:47:30,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:47:30,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:47:30,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:47:30,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:47:29" (1/3) ... [2020-10-23 21:47:30,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1100c105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:30, skipping insertion in model container [2020-10-23 21:47:30,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:29" (2/3) ... [2020-10-23 21:47:30,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1100c105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:30, skipping insertion in model container [2020-10-23 21:47:30,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:30" (3/3) ... [2020-10-23 21:47:30,346 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2020-10-23 21:47:30,360 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:47:30,366 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:47:30,382 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:47:30,421 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:47:30,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:47:30,422 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:47:30,422 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:47:30,422 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:47:30,422 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:47:30,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:47:30,423 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:47:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-23 21:47:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 21:47:30,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:30,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:30,464 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1197886019, now seen corresponding path program 1 times [2020-10-23 21:47:30,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:30,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825182901] [2020-10-23 21:47:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:30,575 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:30,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:30,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825182901] [2020-10-23 21:47:30,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:30,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:47:30,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443277053] [2020-10-23 21:47:30,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:47:30,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:47:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:30,827 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-23 21:47:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:30,923 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-23 21:47:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:47:30,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-23 21:47:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:30,934 INFO L225 Difference]: With dead ends: 44 [2020-10-23 21:47:30,934 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 21:47:30,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 21:47:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 21:47:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 21:47:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-23 21:47:30,987 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-23 21:47:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:30,988 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-23 21:47:30,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:47:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-23 21:47:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 21:47:30,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:30,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:30,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:47:30,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:30,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1054740264, now seen corresponding path program 1 times [2020-10-23 21:47:30,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:30,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582991326] [2020-10-23 21:47:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:30,995 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:31,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:31,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582991326] [2020-10-23 21:47:31,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:31,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:47:31,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978496737] [2020-10-23 21:47:31,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:47:31,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:47:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:47:31,180 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-10-23 21:47:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:31,365 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-23 21:47:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:47:31,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-23 21:47:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:31,367 INFO L225 Difference]: With dead ends: 31 [2020-10-23 21:47:31,367 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 21:47:31,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 21:47:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 21:47:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-23 21:47:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-23 21:47:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-23 21:47:31,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-23 21:47:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:31,385 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-23 21:47:31,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:47:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-23 21:47:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 21:47:31,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:31,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:31,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:47:31,388 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1378332055, now seen corresponding path program 1 times [2020-10-23 21:47:31,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:31,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217801061] [2020-10-23 21:47:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:31,922 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-23 21:47:31,938 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:47:31,941 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:32,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217801061] [2020-10-23 21:47:32,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:32,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 21:47:32,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601038481] [2020-10-23 21:47:32,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 21:47:32,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:32,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 21:47:32,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:47:32,101 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2020-10-23 21:47:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:32,408 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-23 21:47:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:47:32,408 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-23 21:47:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:32,410 INFO L225 Difference]: With dead ends: 25 [2020-10-23 21:47:32,411 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 21:47:32,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 21:47:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 21:47:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 21:47:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 21:47:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 21:47:32,415 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-23 21:47:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:32,415 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 21:47:32,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 21:47:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 21:47:32,416 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 21:47:32,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:47:32,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 21:47:32,853 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,853 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,854 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,854 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,854 INFO L277 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,854 INFO L277 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,854 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 21:47:32,855 INFO L277 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,855 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-23 21:47:32,855 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,855 INFO L270 CegarLoopResult]: 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|)) [2020-10-23 21:47:32,855 INFO L277 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,856 INFO L277 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-10-23 21:47:32,856 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-23 21:47:32,856 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-23 21:47:32,856 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 21:47:32,856 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 21:47:32,856 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-23 21:47:32,857 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-10-23 21:47:32,857 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 13 22) the Hoare annotation is: true [2020-10-23 21:47:32,857 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 2))) (and (< 0 .cse0) (<= main_~x~0 (* 2 .cse0)))) (= main_~x~0 0)) [2020-10-23 21:47:32,857 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (= main_~x~0 0) [2020-10-23 21:47:32,858 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 19) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 2))) (and (< 0 .cse0) (<= main_~x~0 (* 2 .cse0)))) (= main_~x~0 0)) [2020-10-23 21:47:32,858 INFO L270 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (= main_~x~0 0) [2020-10-23 21:47:32,858 INFO L270 CegarLoopResult]: At program point L17-3(lines 17 19) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 2))) (and (< 0 .cse0) (<= main_~x~0 (* 2 .cse0)))) (= main_~x~0 0)) [2020-10-23 21:47:32,858 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 13 22) the Hoare annotation is: true [2020-10-23 21:47:32,858 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-23 21:47:32,858 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-10-23 21:47:32,859 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 21:47:32,859 INFO L270 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-23 21:47:32,859 INFO L270 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 21:47:32,859 INFO L277 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-10-23 21:47:32,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:47:32 BoogieIcfgContainer [2020-10-23 21:47:32,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:47:32,881 INFO L168 Benchmark]: Toolchain (without parser) took 3545.70 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 143.9 MB in the beginning and 75.6 MB in the end (delta: 68.3 MB). Peak memory consumption was 103.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:32,882 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 166.7 MB. Free memory is still 140.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:47:32,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.01 ms. Allocated memory is still 166.7 MB. Free memory was 143.3 MB in the beginning and 133.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:32,884 INFO L168 Benchmark]: Boogie Preprocessor took 66.56 ms. Allocated memory is still 166.7 MB. Free memory was 133.7 MB in the beginning and 132.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:32,885 INFO L168 Benchmark]: RCFGBuilder took 596.69 ms. Allocated memory is still 166.7 MB. Free memory was 132.1 MB in the beginning and 119.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:32,886 INFO L168 Benchmark]: TraceAbstraction took 2541.53 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 119.1 MB in the beginning and 75.6 MB in the end (delta: 43.6 MB). Peak memory consumption was 77.9 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:32,890 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 166.7 MB. Free memory is still 140.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 320.01 ms. Allocated memory is still 166.7 MB. Free memory was 143.3 MB in the beginning and 133.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.56 ms. Allocated memory is still 166.7 MB. Free memory was 133.7 MB in the beginning and 132.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 596.69 ms. Allocated memory is still 166.7 MB. Free memory was 132.1 MB in the beginning and 119.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2541.53 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 119.1 MB in the beginning and 75.6 MB in the end (delta: 43.6 MB). Peak memory consumption was 77.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 < x / 2 && x <= 2 * (x / 2)) || x == 0 - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 35 SDslu, 102 SDs, 0 SdLazy, 84 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 52 PreInvPairs, 64 NumberOfFragments, 125 HoareAnnotationTreeSize, 52 FomulaSimplifications, 132 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 32 FomulaSimplificationsInter, 476 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...