/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/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:26:03,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:26:03,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:26:03,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:26:03,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:26:03,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:26:03,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:26:03,656 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 23:26:03,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:26:03,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:26:03,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:26:03,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:26:03,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:26:03,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:26:03,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:26:03,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:26:03,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:26:03,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:26:03,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:26:03,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:26:03,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:26:03,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:26:03,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:26:03,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:26:03,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:26:03,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:26:03,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:26:03,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:26:03,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:26:03,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:26:03,681 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:26:03,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:26:03,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:26:04,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:26:04,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:26:04,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:26:04,008 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:26:04,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2021-05-02 23:26:04,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daf85a8c9/79a8842f73cc4cf19d4fe943e8457021/FLAGf0d6e09e8 [2021-05-02 23:26:04,441 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:26:04,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2021-05-02 23:26:04,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daf85a8c9/79a8842f73cc4cf19d4fe943e8457021/FLAGf0d6e09e8 [2021-05-02 23:26:04,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daf85a8c9/79a8842f73cc4cf19d4fe943e8457021 [2021-05-02 23:26:04,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:26:04,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:26:04,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:26:04,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:26:04,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:26:04,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:26:04" (1/1) ... [2021-05-02 23:26:04,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32edee86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:04, skipping insertion in model container [2021-05-02 23:26:04,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:26:04" (1/1) ... [2021-05-02 23:26:04,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:26:04,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:26:05,005 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/functions_1-2.c[325,338] [2021-05-02 23:26:05,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:26:05,019 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:26:05,029 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/functions_1-2.c[325,338] [2021-05-02 23:26:05,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:26:05,049 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:26:05,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05 WrapperNode [2021-05-02 23:26:05,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:26:05,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:26:05,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:26:05,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:26:05,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (1/1) ... [2021-05-02 23:26:05,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (1/1) ... [2021-05-02 23:26:05,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (1/1) ... [2021-05-02 23:26:05,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (1/1) ... [2021-05-02 23:26:05,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (1/1) ... [2021-05-02 23:26:05,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (1/1) ... [2021-05-02 23:26:05,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (1/1) ... [2021-05-02 23:26:05,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:26:05,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:26:05,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:26:05,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:26:05,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (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 23:26:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:26:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:26:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:26:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:26:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-05-02 23:26:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:26:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:26:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:26:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:26:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:26:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:26:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-05-02 23:26:05,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:26:05,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:26:05,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:26:05,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:26:05,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:26:05,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:26:05,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:26:05,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:26:05,426 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:26:05,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:26:05 BoogieIcfgContainer [2021-05-02 23:26:05,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:26:05,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:26:05,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:26:05,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:26:05,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:26:04" (1/3) ... [2021-05-02 23:26:05,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9aac93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:26:05, skipping insertion in model container [2021-05-02 23:26:05,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:26:05" (2/3) ... [2021-05-02 23:26:05,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9aac93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:26:05, skipping insertion in model container [2021-05-02 23:26:05,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:26:05" (3/3) ... [2021-05-02 23:26:05,433 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2021-05-02 23:26:05,438 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:26:05,440 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:26:05,452 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:26:05,468 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:26:05,469 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:26:05,469 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:26:05,469 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:26:05,469 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:26:05,469 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:26:05,469 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:26:05,469 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:26:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:26:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:26:05,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:05,494 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:05,494 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 1 times [2021-05-02 23:26:05,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:05,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513115264] [2021-05-02 23:26:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:05,562 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:05,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:05,776 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 23:26:05,778 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:05,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513115264] [2021-05-02 23:26:05,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513115264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:05,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:05,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:26:05,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494429501] [2021-05-02 23:26:05,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:26:05,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:05,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:26:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:26:05,795 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 23:26:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:05,883 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 23:26:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:26:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 23:26:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:05,889 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:26:05,890 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:26:05,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:26:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:26:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:26:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:26:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:26:05,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2021-05-02 23:26:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:05,924 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:26:05,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 23:26:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:26:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:26:05,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:05,925 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:05,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:26:05,926 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:05,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 1 times [2021-05-02 23:26:05,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:05,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350049758] [2021-05-02 23:26:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:05,936 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:06,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:06,024 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 23:26:06,024 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350049758] [2021-05-02 23:26:06,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350049758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:06,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:06,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:26:06,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001624083] [2021-05-02 23:26:06,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:26:06,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:26:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:26:06,027 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:06,101 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-05-02 23:26:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:26:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 23:26:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:06,104 INFO L225 Difference]: With dead ends: 25 [2021-05-02 23:26:06,105 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:26:06,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:26:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:26:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-05-02 23:26:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:26:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:26:06,123 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2021-05-02 23:26:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:06,123 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:26:06,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:26:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:26:06,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:06,124 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:06,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:26:06,124 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:06,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 1 times [2021-05-02 23:26:06,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:06,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194864214] [2021-05-02 23:26:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:06,180 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~x~0_11 4294967296) 268435455) InVars {main_~x~0=v_main_~x~0_11} OutVars{main_~x~0=v_main_~x~0_11} AuxVars[] AssignedVars[] [2021-05-02 23:26:06,197 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-02 23:26:06,220 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:26:06,328 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-02 23:26:06,387 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 61 [2021-05-02 23:26:06,459 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:26:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:26:06,499 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:26:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:26:06,549 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:26:06,574 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:26:06,574 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:26:06,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:26:06,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:26:06 BoogieIcfgContainer [2021-05-02 23:26:06,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:26:06,587 INFO L168 Benchmark]: Toolchain (without parser) took 1700.74 ms. Allocated memory is still 198.2 MB. Free memory was 164.2 MB in the beginning and 172.8 MB in the end (delta: -8.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:26:06,588 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:26:06,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.93 ms. Allocated memory is still 198.2 MB. Free memory was 164.0 MB in the beginning and 154.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:26:06,589 INFO L168 Benchmark]: Boogie Preprocessor took 52.23 ms. Allocated memory is still 198.2 MB. Free memory was 154.7 MB in the beginning and 182.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:26:06,592 INFO L168 Benchmark]: RCFGBuilder took 323.75 ms. Allocated memory is still 198.2 MB. Free memory was 182.2 MB in the beginning and 169.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:26:06,592 INFO L168 Benchmark]: TraceAbstraction took 1157.06 ms. Allocated memory is still 198.2 MB. Free memory was 168.5 MB in the beginning and 172.8 MB in the end (delta: -4.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:26:06,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 160.93 ms. Allocated memory is still 198.2 MB. Free memory was 164.0 MB in the beginning and 154.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.23 ms. Allocated memory is still 198.2 MB. Free memory was 154.7 MB in the beginning and 182.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 323.75 ms. Allocated memory is still 198.2 MB. Free memory was 182.2 MB in the beginning and 169.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1157.06 ms. Allocated memory is still 198.2 MB. Free memory was 168.5 MB in the beginning and 172.8 MB in the end (delta: -4.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] unsigned int x = 0; [L19] COND TRUE x < 0x0fffffff [L20] CALL, EXPR f(x) [L13] return z + 2; [L20] RET, EXPR f(x) [L20] x = f(x) [L19] COND FALSE !(x < 0x0fffffff) [L23] CALL __VERIFIER_assert(x % 2) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1109.5ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 9.7ms, AutomataDifference: 186.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 24 SDslu, 11 SDs, 0 SdLazy, 20 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 117.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...