/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/nla-digbench-scaling/dijkstra-u_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:41:04,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:41:04,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:41:04,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:41:05,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:41:05,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:41:05,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:41:05,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:41:05,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:41:05,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:41:05,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:41:05,061 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:41:05,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:41:05,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:41:05,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:41:05,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:41:05,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:41:05,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:41:05,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:41:05,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:41:05,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:41:05,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:41:05,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:41:05,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:41:05,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:41:05,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:41:05,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:41:05,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:41:05,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:41:05,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:41:05,064 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:41:05,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:41:05,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:41:05,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:41:05,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:41:05,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:41:05,380 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:41:05,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2021-05-03 00:41:05,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9973df5d/9569fa8ece1f41fe83b6466540968b75/FLAGe83bd562b [2021-05-03 00:41:05,843 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:41:05,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2021-05-03 00:41:05,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9973df5d/9569fa8ece1f41fe83b6466540968b75/FLAGe83bd562b [2021-05-03 00:41:05,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9973df5d/9569fa8ece1f41fe83b6466540968b75 [2021-05-03 00:41:05,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:41:05,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:41:05,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:41:05,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:41:05,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:41:05,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:41:05" (1/1) ... [2021-05-03 00:41:05,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfc80a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:05, skipping insertion in model container [2021-05-03 00:41:05,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:41:05" (1/1) ... [2021-05-03 00:41:05,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:41:05,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:41:06,085 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c[533,546] [2021-05-03 00:41:06,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:41:06,116 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:41:06,127 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c[533,546] [2021-05-03 00:41:06,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:41:06,160 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:41:06,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06 WrapperNode [2021-05-03 00:41:06,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:41:06,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:41:06,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:41:06,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:41:06,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (1/1) ... [2021-05-03 00:41:06,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (1/1) ... [2021-05-03 00:41:06,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (1/1) ... [2021-05-03 00:41:06,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (1/1) ... [2021-05-03 00:41:06,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (1/1) ... [2021-05-03 00:41:06,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (1/1) ... [2021-05-03 00:41:06,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (1/1) ... [2021-05-03 00:41:06,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:41:06,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:41:06,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:41:06,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:41:06,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (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 [2021-05-03 00:41:06,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:41:06,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:41:06,362 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:41:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:41:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:41:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:41:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:41:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:41:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:41:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:41:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-03 00:41:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:41:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:41:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:41:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:41:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:41:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:41:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:41:06,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:41:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:41:06,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:41:06,697 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:41:06,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:41:06 BoogieIcfgContainer [2021-05-03 00:41:06,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:41:06,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:41:06,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:41:06,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:41:06,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:41:05" (1/3) ... [2021-05-03 00:41:06,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fa9524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:41:06, skipping insertion in model container [2021-05-03 00:41:06,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:41:06" (2/3) ... [2021-05-03 00:41:06,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fa9524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:41:06, skipping insertion in model container [2021-05-03 00:41:06,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:41:06" (3/3) ... [2021-05-03 00:41:06,710 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound2.c [2021-05-03 00:41:06,742 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:41:06,745 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:41:06,779 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:41:06,804 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:41:06,805 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:41:06,805 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:41:06,805 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:41:06,805 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:41:06,805 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:41:06,806 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:41:06,806 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:41:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-03 00:41:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:41:06,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:41:06,834 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:41:06,835 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:41:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:41:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-03 00:41:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:41:06,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375665338] [2021-05-03 00:41:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:41:06,917 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:41:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:07,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:41:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:07,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:41:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:07,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:41:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:41:07,165 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:07,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375665338] [2021-05-03 00:41:07,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375665338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:07,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:07,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:41:07,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935620871] [2021-05-03 00:41:07,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:41:07,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:07,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:41:07,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:41:07,186 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:41:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:41:10,493 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-03 00:41:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:41:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-03 00:41:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:41:10,502 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:41:10,502 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:41:10,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:41:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:41:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-03 00:41:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-03 00:41:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-03 00:41:10,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-03 00:41:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:41:10,558 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-03 00:41:10,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:41:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-03 00:41:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:41:10,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:41:10,560 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:41:10,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:41:10,561 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:41:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:41:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-03 00:41:10,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:41:10,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151812671] [2021-05-03 00:41:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:41:10,565 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:41:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:10,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:41:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:10,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:41:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:10,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:41:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:41:10,831 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:10,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151812671] [2021-05-03 00:41:10,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [151812671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:10,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:10,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 00:41:10,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092575100] [2021-05-03 00:41:10,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 00:41:10,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 00:41:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 00:41:10,833 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-03 00:41:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:41:28,978 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-05-03 00:41:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:41:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-03 00:41:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:41:28,981 INFO L225 Difference]: With dead ends: 67 [2021-05-03 00:41:28,981 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 00:41:28,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:41:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 00:41:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-03 00:41:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-03 00:41:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-03 00:41:29,012 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2021-05-03 00:41:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:41:29,015 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-03 00:41:29,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-03 00:41:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-03 00:41:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:41:29,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:41:29,018 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:41:29,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:41:29,022 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:41:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:41:29,023 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-05-03 00:41:29,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:41:29,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689463913] [2021-05-03 00:41:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:41:29,030 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:41:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:29,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:41:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:29,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:41:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:29,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:41:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:41:29,362 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:29,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689463913] [2021-05-03 00:41:29,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [689463913] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:29,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:29,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:41:29,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892385417] [2021-05-03 00:41:29,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 00:41:29,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:29,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 00:41:29,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-03 00:41:29,365 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-03 00:42:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:02,547 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-05-03 00:42:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:42:02,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-05-03 00:42:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:02,549 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:42:02,549 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 00:42:02,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:42:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 00:42:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-03 00:42:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-03 00:42:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-03 00:42:02,566 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 26 [2021-05-03 00:42:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:02,566 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-03 00:42:02,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-03 00:42:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-03 00:42:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:42:02,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:02,567 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:02,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:42:02,568 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:02,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:02,568 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-05-03 00:42:02,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:02,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40020353] [2021-05-03 00:42:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:02,571 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:02,581 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:42:02,581 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:42:02,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:42:02,595 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:42:02,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:42:02 BoogieIcfgContainer [2021-05-03 00:42:02,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:42:02,596 INFO L168 Benchmark]: Toolchain (without parser) took 56714.92 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 166.9 MB in the beginning and 171.2 MB in the end (delta: -4.2 MB). Peak memory consumption was 37.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:02,597 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory was 184.0 MB in the beginning and 183.9 MB in the end (delta: 106.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:02,597 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.91 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 156.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:02,598 INFO L168 Benchmark]: Boogie Preprocessor took 109.61 ms. Allocated memory is still 201.3 MB. Free memory was 156.0 MB in the beginning and 184.5 MB in the end (delta: -28.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:02,598 INFO L168 Benchmark]: RCFGBuilder took 425.19 ms. Allocated memory is still 201.3 MB. Free memory was 184.5 MB in the beginning and 167.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:02,599 INFO L168 Benchmark]: TraceAbstraction took 55895.37 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 167.1 MB in the beginning and 171.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:02,601 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory was 184.0 MB in the beginning and 183.9 MB in the end (delta: 106.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.91 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 156.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 109.61 ms. Allocated memory is still 201.3 MB. Free memory was 156.0 MB in the beginning and 184.5 MB in the end (delta: -28.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.19 ms. Allocated memory is still 201.3 MB. Free memory was 184.5 MB in the beginning and 167.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 55895.37 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 167.1 MB in the beginning and 171.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L20] unsigned int n, p, q, r, h; [L22] n = __VERIFIER_nondet_unsigned_int() [L23] CALL assume_abort_if_not(n>=0 && n<=2) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=2) [L24] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n < 4294967295 / 4) [L26] p = 0 [L27] q = 1 [L28] r = n [L29] h = 0 [L30] COND TRUE 1 [L31] COND TRUE !(q <= n) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(r < 2 * p + q) [L40] CALL __VERIFIER_assert(p*p + r*q == n*q) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 55783.0ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 16.7ms, AutomataDifference: 54667.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 101 SDtfs, 91 SDslu, 151 SDs, 0 SdLazy, 326 SolverSat, 92 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 51670.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 896.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84.5ms AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 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...