/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-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:36:07,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:36:07,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:36:07,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:36:07,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:36:07,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:36:07,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:36:07,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:36:07,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:36:07,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:36:07,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:36:07,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:36:07,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:36:07,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:36:07,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:36:07,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:36:07,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:36:07,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:36:07,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:36:07,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:36:07,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:36:07,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:36:07,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:36:07,164 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:36:07,164 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:36:07,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:36:07,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:36:07,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:36:07,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:36:07,461 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:36:07,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-05-06 11:36:07,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d3ca412/333966ee2ff44209847ba251d77fe72c/FLAGa966cdf90 [2021-05-06 11:36:07,807 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:36:07,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2021-05-06 11:36:07,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d3ca412/333966ee2ff44209847ba251d77fe72c/FLAGa966cdf90 [2021-05-06 11:36:08,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d3ca412/333966ee2ff44209847ba251d77fe72c [2021-05-06 11:36:08,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:36:08,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:36:08,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:36:08,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:36:08,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:36:08,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a6564e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08, skipping insertion in model container [2021-05-06 11:36:08,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:36:08,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:36:08,346 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-lit/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-05-06 11:36:08,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:36:08,353 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:36:08,362 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-lit/gsv2008.c.i.v+cfa-reducer.c[986,999] [2021-05-06 11:36:08,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:36:08,371 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:36:08,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08 WrapperNode [2021-05-06 11:36:08,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:36:08,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:36:08,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:36:08,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:36:08,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... [2021-05-06 11:36:08,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:36:08,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:36:08,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:36:08,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:36:08,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:36:08,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:36:08,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:36:08,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:36:08,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:36:08,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:36:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:36:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:36:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:36:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:36:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:36:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:36:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:36:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:36:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:36:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:36:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:36:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:36:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:36:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:36:08,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:36:08,657 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-06 11:36:08,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:36:08 BoogieIcfgContainer [2021-05-06 11:36:08,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:36:08,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:36:08,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:36:08,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:36:08,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:36:08" (1/3) ... [2021-05-06 11:36:08,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afaa4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:36:08, skipping insertion in model container [2021-05-06 11:36:08,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:36:08" (2/3) ... [2021-05-06 11:36:08,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afaa4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:36:08, skipping insertion in model container [2021-05-06 11:36:08,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:36:08" (3/3) ... [2021-05-06 11:36:08,662 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2021-05-06 11:36:08,666 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:36:08,668 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:36:08,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:36:08,692 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:36:08,692 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:36:08,693 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:36:08,693 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:36:08,693 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:36:08,693 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:36:08,693 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:36:08,693 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:36:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:36:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:36:08,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:08,706 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:08,706 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:08,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1088558671, now seen corresponding path program 1 times [2021-05-06 11:36:08,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:08,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816058365] [2021-05-06 11:36:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:08,751 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:36:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:08,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:36:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:36:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:36:08,930 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:36:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816058365] [2021-05-06 11:36:08,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816058365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:36:08,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:36:08,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:36:08,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38271393] [2021-05-06 11:36:08,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:36:08,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:36:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:36:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:36:08,944 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:36:09,008 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-06 11:36:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:36:09,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:36:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:36:09,019 INFO L225 Difference]: With dead ends: 26 [2021-05-06 11:36:09,019 INFO L226 Difference]: Without dead ends: 13 [2021-05-06 11:36:09,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:36:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-06 11:36:09,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-06 11:36:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-06 11:36:09,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-06 11:36:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:36:09,043 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-06 11:36:09,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:36:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-06 11:36:09,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:36:09,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:36:09,044 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:36:09,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:36:09,044 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:36:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:36:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash 614357099, now seen corresponding path program 1 times [2021-05-06 11:36:09,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:36:09,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565776375] [2021-05-06 11:36:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:36:09,102 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 96.0 percent of original size [2021-05-06 11:36:09,111 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:09,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:12,223 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 5 [2021-05-06 11:36:13,411 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 11 DAG size of output: 1 [2021-05-06 11:36:13,414 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-06 11:36:13,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:13,818 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-06 11:36:16,617 WARN L205 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-06 11:36:25,522 WARN L205 SmtUtils]: Spent 8.90 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-06 11:36:25,524 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:36:25,533 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-05-06 11:36:25,537 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:25,539 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:25,751 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-06 11:36:30,521 WARN L205 SmtUtils]: Spent 4.77 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-06 11:36:33,713 WARN L205 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-06 11:36:33,718 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:36:33,719 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-06 11:36:34,785 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 11 [2021-05-06 11:36:34,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:39,561 WARN L205 SmtUtils]: Spent 4.77 s on a formula simplification that was a NOOP. DAG size: 10 [2021-05-06 11:36:49,743 WARN L205 SmtUtils]: Spent 10.18 s on a formula simplification that was a NOOP. DAG size: 9 [2021-05-06 11:36:51,100 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-06 11:36:51,103 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:36:51,998 WARN L205 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-05-06 11:36:52,202 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-06 11:36:53,653 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-06 11:36:55,140 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-06 11:36:55,158 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:55,161 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:55,262 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-06 11:36:55,269 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:36:55,280 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-06 11:36:55,281 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-05-06 11:42:17,799 WARN L205 SmtUtils]: Spent 5.38 m on a formula simplification that was a NOOP. DAG size: 3 [2021-05-06 11:42:17,804 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:17,806 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:17,827 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-06 11:42:17,828 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-06 11:42:17,893 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:17,921 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-06 11:42:17,931 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 96.0 percent of original size 193 [2021-05-06 11:42:18,146 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-06 11:42:18,148 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:42:18,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:42:18,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:42:18,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:42:18,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:42:18,294 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:42:18,322 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 11:42:18,322 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 11:42:18,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:42:18,336 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 11:42:18,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:42:18 BoogieIcfgContainer [2021-05-06 11:42:18,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:42:18,338 INFO L168 Benchmark]: Toolchain (without parser) took 370099.62 ms. Allocated memory was 127.9 MB in the beginning and 169.9 MB in the end (delta: 41.9 MB). Free memory was 93.5 MB in the beginning and 124.2 MB in the end (delta: -30.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:18,339 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory is still 109.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:42:18,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.82 ms. Allocated memory is still 127.9 MB. Free memory was 93.3 MB in the beginning and 83.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:18,340 INFO L168 Benchmark]: Boogie Preprocessor took 45.82 ms. Allocated memory was 127.9 MB in the beginning and 169.9 MB in the end (delta: 41.9 MB). Free memory was 83.7 MB in the beginning and 153.5 MB in the end (delta: -69.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:18,342 INFO L168 Benchmark]: RCFGBuilder took 239.31 ms. Allocated memory is still 169.9 MB. Free memory was 153.5 MB in the beginning and 139.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:18,342 INFO L168 Benchmark]: TraceAbstraction took 369678.83 ms. Allocated memory is still 169.9 MB. Free memory was 139.4 MB in the beginning and 124.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:18,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory is still 109.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 129.82 ms. Allocated memory is still 127.9 MB. Free memory was 93.3 MB in the beginning and 83.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.82 ms. Allocated memory was 127.9 MB in the beginning and 169.9 MB in the end (delta: 41.9 MB). Free memory was 83.7 MB in the beginning and 153.5 MB in the end (delta: -69.9 MB). Peak memory consumption was 5.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 239.31 ms. Allocated memory is still 169.9 MB. Free memory was 153.5 MB in the beginning and 139.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 369678.83 ms. Allocated memory is still 169.9 MB. Free memory was 139.4 MB in the beginning and 124.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1] int __return_main; [L12] int __return_65; [L15] int main__x; [L16] int main__y; [L17] main__x = -50 [L18] main__y = __VERIFIER_nondet_int() [L19] COND FALSE !(!(-1000 < main__y)) [L25] COND FALSE !(!(main__y < 1000000)) [L32] COND TRUE main__x < 0 [L34] main__x = main__x + main__y [L35] int main____CPAchecker_TMP_0 = main__y; [L36] main__y = main__y + 1 [L32] COND FALSE !(main__x < 0) [L42] int __tmp_1; [L43] __tmp_1 = main__y > 0 [L44] int __VERIFIER_assert__cond; [L45] __VERIFIER_assert__cond = __tmp_1 [L46] COND TRUE __VERIFIER_assert__cond == 0 [L48] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 369634.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.9ms, AutomataDifference: 86.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 SDtfs, 13 SDslu, 10 SDs, 0 SdLazy, 14 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...