/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:58:40,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:58:40,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:58:40,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:58:40,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:58:40,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:58:40,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:58:40,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:58:40,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:58:40,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:58:40,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:58:40,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:58:40,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:58:40,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:58:40,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:58:40,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:58:40,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:58:40,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:58:40,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:58:40,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:58:40,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:58:40,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:58:40,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:58:40,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:58:40,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:58:40,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:58:40,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:58:40,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:58:40,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:58:40,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:58:40,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:58:40,261 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:58:40,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:58:40,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:58:40,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:58:40,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:58:40,262 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:58:40,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:58:40,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:58:40,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:40,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:58:40,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:58:40,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:58:40,264 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:58:40,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:58:40,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:58:40,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:58:40,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:58:40,694 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:58:40,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-11-07 01:58:40,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35dd625fc/d2853a913004405d836799e27c481d8a/FLAG6d90db827 [2020-11-07 01:58:41,451 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:58:41,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-11-07 01:58:41,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35dd625fc/d2853a913004405d836799e27c481d8a/FLAG6d90db827 [2020-11-07 01:58:41,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35dd625fc/d2853a913004405d836799e27c481d8a [2020-11-07 01:58:41,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:58:41,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:58:41,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:41,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:58:41,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:58:41,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12579b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:41, skipping insertion in model container [2020-11-07 01:58:41,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:41" (1/1) ... [2020-11-07 01:58:41,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:58:41,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:58:42,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:42,051 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:58:42,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:42,084 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:58:42,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42 WrapperNode [2020-11-07 01:58:42,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:42,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:58:42,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:58:42,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:58:42,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2020-11-07 01:58:42,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2020-11-07 01:58:42,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2020-11-07 01:58:42,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2020-11-07 01:58:42,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2020-11-07 01:58:42,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2020-11-07 01:58:42,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... [2020-11-07 01:58:42,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:58:42,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:58:42,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:58:42,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:58:42,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:42,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:58:42,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:58:42,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:58:42,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:58:42,205 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-11-07 01:58:42,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:58:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:58:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:58:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:58:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:58:42,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:58:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-11-07 01:58:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:58:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:58:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:58:42,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:58:42,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:58:42,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:58:42,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:58:42,440 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:58:42,440 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 01:58:42,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:42 BoogieIcfgContainer [2020-11-07 01:58:42,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:58:42,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:58:42,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:58:42,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:58:42,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:41" (1/3) ... [2020-11-07 01:58:42,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbcf034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:42, skipping insertion in model container [2020-11-07 01:58:42,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42" (2/3) ... [2020-11-07 01:58:42,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbcf034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:42, skipping insertion in model container [2020-11-07 01:58:42,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:42" (3/3) ... [2020-11-07 01:58:42,453 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-11-07 01:58:42,476 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:58:42,481 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:58:42,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:58:42,559 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:58:42,559 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:58:42,559 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:58:42,559 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:58:42,560 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:58:42,560 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:58:42,560 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:58:42,560 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:58:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-07 01:58:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-07 01:58:42,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:42,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:42,624 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash 836199736, now seen corresponding path program 1 times [2020-11-07 01:58:42,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:42,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197978643] [2020-11-07 01:58:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:42,757 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:42,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:58:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197978643] [2020-11-07 01:58:43,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:43,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:58:43,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491840222] [2020-11-07 01:58:43,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:58:43,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:58:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:43,048 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-11-07 01:58:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:43,156 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-07 01:58:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:58:43,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-07 01:58:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:43,168 INFO L225 Difference]: With dead ends: 52 [2020-11-07 01:58:43,169 INFO L226 Difference]: Without dead ends: 29 [2020-11-07 01:58:43,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:58:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-07 01:58:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-07 01:58:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 01:58:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-07 01:58:43,228 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 19 [2020-11-07 01:58:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:43,228 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-07 01:58:43,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:58:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-07 01:58:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 01:58:43,230 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:43,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:58:43,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:58:43,231 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:43,232 INFO L82 PathProgramCache]: Analyzing trace with hash -80945063, now seen corresponding path program 1 times [2020-11-07 01:58:43,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:43,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600215328] [2020-11-07 01:58:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:43,236 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:58:43,289 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:58:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:58:43,315 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:58:43,353 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 01:58:43,353 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 01:58:43,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:58:43,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:58:43 BoogieIcfgContainer [2020-11-07 01:58:43,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:58:43,373 INFO L168 Benchmark]: Toolchain (without parser) took 1567.15 ms. Allocated memory is still 163.6 MB. Free memory was 139.7 MB in the beginning and 117.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,374 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 163.6 MB. Free memory is still 138.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:58:43,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.09 ms. Allocated memory is still 163.6 MB. Free memory was 139.1 MB in the beginning and 130.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,376 INFO L168 Benchmark]: Boogie Preprocessor took 36.64 ms. Allocated memory is still 163.6 MB. Free memory was 130.2 MB in the beginning and 128.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,378 INFO L168 Benchmark]: RCFGBuilder took 318.78 ms. Allocated memory is still 163.6 MB. Free memory was 128.7 MB in the beginning and 115.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-07 01:58:43,378 INFO L168 Benchmark]: TraceAbstraction took 925.55 ms. Allocated memory is still 163.6 MB. Free memory was 115.4 MB in the beginning and 117.4 MB in the end (delta: -1.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:58:43,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 163.6 MB. Free memory is still 138.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.09 ms. Allocated memory is still 163.6 MB. Free memory was 139.1 MB in the beginning and 130.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.64 ms. Allocated memory is still 163.6 MB. Free memory was 130.2 MB in the beginning and 128.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 318.78 ms. Allocated memory is still 163.6 MB. Free memory was 128.7 MB in the beginning and 115.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 925.55 ms. Allocated memory is still 163.6 MB. Free memory was 115.4 MB in the beginning and 117.4 MB in the end (delta: -1.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int x=0; [L26] COND TRUE 1 [L28] CALL eval() [L16] COND TRUE 1 [L17] x=1 [L28] RET eval() [L29] CALL __VERIFIER_assert(x==0) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "while_infinite_loop_4.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 7 SDslu, 4 SDs, 0 SdLazy, 13 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 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...