/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-acceleration/simple_3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:29:04,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:29:04,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:29:04,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:29:04,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:29:04,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:29:04,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:29:04,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:29:04,304 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:29:04,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:29:04,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:29:04,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:29:04,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:29:04,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:29:04,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:29:04,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:29:04,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:29:04,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:29:04,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:29:04,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:29:04,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:29:04,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:29:04,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:29:04,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:29:04,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:29:04,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:29:04,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:29:04,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:29:04,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:29:04,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:29:04,308 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:29:04,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:29:04,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:29:04,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:29:04,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:29:04,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:29:04,702 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:29:04,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2021-05-02 23:29:04,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7e615d3/16062b6f1e534d29941467840876463f/FLAG7b6e8c712 [2021-05-02 23:29:05,448 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:29:05,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2021-05-02 23:29:05,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7e615d3/16062b6f1e534d29941467840876463f/FLAG7b6e8c712 [2021-05-02 23:29:05,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a7e615d3/16062b6f1e534d29941467840876463f [2021-05-02 23:29:05,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:29:05,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:29:05,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:05,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:29:05,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:29:05,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:05" (1/1) ... [2021-05-02 23:29:05,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684b4e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:05, skipping insertion in model container [2021-05-02 23:29:05,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:05" (1/1) ... [2021-05-02 23:29:05,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:29:05,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:29:06,017 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-acceleration/simple_3-2.c[376,389] [2021-05-02 23:29:06,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:06,054 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:29:06,072 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-acceleration/simple_3-2.c[376,389] [2021-05-02 23:29:06,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:06,095 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:29:06,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06 WrapperNode [2021-05-02 23:29:06,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:06,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:29:06,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:29:06,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:29:06,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... [2021-05-02 23:29:06,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... [2021-05-02 23:29:06,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... [2021-05-02 23:29:06,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... [2021-05-02 23:29:06,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... [2021-05-02 23:29:06,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... [2021-05-02 23:29:06,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... [2021-05-02 23:29:06,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:29:06,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:29:06,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:29:06,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:29:06,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:29:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:29:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:29:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:29:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:29:06,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:29:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:29:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:29:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:29:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:29:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2021-05-02 23:29:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:29:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:29:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:29:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:29:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:29:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:29:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:29:06,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:29:06,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:29:06,605 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:29:06,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:06 BoogieIcfgContainer [2021-05-02 23:29:06,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:29:06,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:29:06,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:29:06,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:29:06,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:29:05" (1/3) ... [2021-05-02 23:29:06,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200c03bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:06, skipping insertion in model container [2021-05-02 23:29:06,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:06" (2/3) ... [2021-05-02 23:29:06,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200c03bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:06, skipping insertion in model container [2021-05-02 23:29:06,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:06" (3/3) ... [2021-05-02 23:29:06,632 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2021-05-02 23:29:06,638 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:29:06,659 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:29:06,678 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:29:06,701 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:29:06,701 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:29:06,701 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:29:06,701 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:29:06,701 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:29:06,702 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:29:06,702 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:29:06,702 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:29:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:29:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:29:06,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:06,726 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:06,727 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1301225826, now seen corresponding path program 1 times [2021-05-02 23:29:06,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:06,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834839998] [2021-05-02 23:29:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:06,826 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:07,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:07,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834839998] [2021-05-02 23:29:07,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834839998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:07,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:07,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:29:07,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845771032] [2021-05-02 23:29:07,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:29:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:07,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:29:07,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:29:07,310 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2021-05-02 23:29:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:07,845 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 23:29:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:29:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2021-05-02 23:29:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:07,855 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:29:07,855 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 23:29:07,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 410.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:29:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 23:29:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 23:29:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 23:29:07,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 23:29:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:07,900 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 23:29:07,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2021-05-02 23:29:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 23:29:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:29:07,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:07,901 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:07,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:29:07,902 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1718713523, now seen corresponding path program 1 times [2021-05-02 23:29:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:07,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482525663] [2021-05-02 23:29:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:07,951 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_8 4294967296) (mod v_main_~N~0_4 65536)) InVars {main_~x~0=v_main_~x~0_8, main_~N~0=v_main_~N~0_4} OutVars{main_~x~0=v_main_~x~0_8, main_~N~0=v_main_~N~0_4} AuxVars[] AssignedVars[] [2021-05-02 23:29:07,967 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.4 percent of original size [2021-05-02 23:29:07,973 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:29:08,370 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-02 23:29:08,443 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:29:08,586 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.4 percent of original size 66 [2021-05-02 23:29:08,698 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:29:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:08,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:09,121 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:09,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482525663] [2021-05-02 23:29:09,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [482525663] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:09,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:09,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:29:09,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614649154] [2021-05-02 23:29:09,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:29:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:29:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:29:09,125 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:09,531 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-05-02 23:29:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:29:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:29:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:09,533 INFO L225 Difference]: With dead ends: 15 [2021-05-02 23:29:09,533 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 23:29:09,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:29:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 23:29:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 23:29:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 23:29:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 23:29:09,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-02 23:29:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:09,540 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 23:29:09,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 23:29:09,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 23:29:09,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:29:09,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 23:29:09,864 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 23:29:09,865 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 23:29:09,865 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 23:29:09,866 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:29:09,867 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 23:29:09,870 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:29:09,870 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-02 23:29:09,871 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 23:29:09,871 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 23:29:09,871 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-02 23:29:09,877 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2021-05-02 23:29:09,877 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 13 22) the Hoare annotation is: true [2021-05-02 23:29:09,877 INFO L194 CegarLoopUtils]: At program point L17-2(lines 17 19) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2021-05-02 23:29:09,878 INFO L194 CegarLoopUtils]: At program point L17-3(lines 17 19) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2021-05-02 23:29:09,878 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 13 22) the Hoare annotation is: true [2021-05-02 23:29:09,878 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2021-05-02 23:29:09,878 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:29:09,878 INFO L194 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:29:09,878 INFO L194 CegarLoopUtils]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:29:09,878 INFO L194 CegarLoopUtils]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:29:09,878 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-02 23:29:09,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:29:09 BoogieIcfgContainer [2021-05-02 23:29:09,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:29:09,903 INFO L168 Benchmark]: Toolchain (without parser) took 4056.00 ms. Allocated memory is still 195.0 MB. Free memory was 160.9 MB in the beginning and 83.9 MB in the end (delta: 77.0 MB). Peak memory consumption was 78.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:09,904 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 195.0 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:29:09,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.15 ms. Allocated memory is still 195.0 MB. Free memory was 160.7 MB in the beginning and 151.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:09,908 INFO L168 Benchmark]: Boogie Preprocessor took 34.71 ms. Allocated memory is still 195.0 MB. Free memory was 151.4 MB in the beginning and 150.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:09,908 INFO L168 Benchmark]: RCFGBuilder took 473.85 ms. Allocated memory is still 195.0 MB. Free memory was 150.0 MB in the beginning and 166.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:09,909 INFO L168 Benchmark]: TraceAbstraction took 3291.51 ms. Allocated memory is still 195.0 MB. Free memory was 165.9 MB in the beginning and 83.9 MB in the end (delta: 82.0 MB). Peak memory consumption was 83.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:09,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 195.0 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.15 ms. Allocated memory is still 195.0 MB. Free memory was 160.7 MB in the beginning and 151.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.71 ms. Allocated memory is still 195.0 MB. Free memory was 151.4 MB in the beginning and 150.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 473.85 ms. Allocated memory is still 195.0 MB. Free memory was 150.0 MB in the beginning and 166.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3291.51 ms. Allocated memory is still 195.0 MB. Free memory was 165.9 MB in the beginning and 83.9 MB in the end (delta: 82.0 MB). Peak memory consumption was 83.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2843.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 13.6ms, AutomataDifference: 978.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 322.3ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 18 SDtfs, 28 SDslu, 39 SDs, 0 SdLazy, 66 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 198.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 899.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 36 PreInvPairs, 53 NumberOfFragments, 85 HoareAnnotationTreeSize, 36 FomulaSimplifications, 120 FormulaSimplificationTreeSizeReduction, 122.6ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 553 FormulaSimplificationTreeSizeReductionInter, 181.7ms 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: 17]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) - 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: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...