/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/ldv-regression/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:35:17,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:35:17,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:35:17,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:35:17,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:35:17,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:35:17,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:35:17,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:35:17,924 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:35:17,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:35:17,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:35:17,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:35:17,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:35:17,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:35:17,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:35:17,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:35:17,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:35:17,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:35:17,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:35:17,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:35:17,928 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:35:17,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:35:17,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:35:17,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:35:17,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:35:17,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:35:17,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:35:17,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:35:18,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:35:18,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:35:18,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:35:18,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:35:18,384 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:35:18,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-10-23 20:35:18,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066da652e/4abc939ae26e455580673d4945fd4a50/FLAG5aac07f84 [2020-10-23 20:35:19,067 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:35:19,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-10-23 20:35:19,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066da652e/4abc939ae26e455580673d4945fd4a50/FLAG5aac07f84 [2020-10-23 20:35:19,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066da652e/4abc939ae26e455580673d4945fd4a50 [2020-10-23 20:35:19,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:35:19,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:35:19,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:35:19,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:35:19,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:35:19,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f177e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19, skipping insertion in model container [2020-10-23 20:35:19,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:35:19,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:35:19,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:35:19,692 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:35:19,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:35:19,729 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:35:19,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19 WrapperNode [2020-10-23 20:35:19,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:35:19,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:35:19,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:35:19,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:35:19,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (1/1) ... [2020-10-23 20:35:19,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:35:19,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:35:19,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:35:19,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:35:19,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (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 [2020-10-23 20:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:35:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:35:19,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:35:20,418 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:35:20,419 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:35:20,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:35:20 BoogieIcfgContainer [2020-10-23 20:35:20,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:35:20,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:35:20,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:35:20,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:35:20,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:35:19" (1/3) ... [2020-10-23 20:35:20,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3643e29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:35:20, skipping insertion in model container [2020-10-23 20:35:20,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:35:19" (2/3) ... [2020-10-23 20:35:20,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3643e29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:35:20, skipping insertion in model container [2020-10-23 20:35:20,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:35:20" (3/3) ... [2020-10-23 20:35:20,431 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-10-23 20:35:20,447 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:35:20,453 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:35:20,471 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:35:20,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:35:20,516 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:35:20,516 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:35:20,523 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:35:20,524 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:35:20,524 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:35:20,524 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:35:20,524 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:35:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-23 20:35:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 20:35:20,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:20,572 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, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:20,573 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash -866172814, now seen corresponding path program 1 times [2020-10-23 20:35:20,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:20,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607621771] [2020-10-23 20:35:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:20,700 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:21,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607621771] [2020-10-23 20:35:21,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:21,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:35:21,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072936040] [2020-10-23 20:35:21,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:35:21,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:21,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:35:21,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:35:21,140 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-23 20:35:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:21,297 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-23 20:35:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:35:21,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 20:35:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:21,308 INFO L225 Difference]: With dead ends: 64 [2020-10-23 20:35:21,308 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 20:35:21,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:35:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 20:35:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 20:35:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 20:35:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 20:35:21,359 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2020-10-23 20:35:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:21,360 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 20:35:21,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:35:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 20:35:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:35:21,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:21,361 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:21,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:35:21,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 329830933, now seen corresponding path program 1 times [2020-10-23 20:35:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:21,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830065368] [2020-10-23 20:35:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:21,374 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:21,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830065368] [2020-10-23 20:35:21,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:21,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:35:21,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436664325] [2020-10-23 20:35:21,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:35:21,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:35:21,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:35:21,605 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 7 states. [2020-10-23 20:35:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:21,803 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 20:35:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:35:21,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-23 20:35:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:21,806 INFO L225 Difference]: With dead ends: 58 [2020-10-23 20:35:21,807 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 20:35:21,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:35:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 20:35:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-10-23 20:35:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 20:35:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 20:35:21,828 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-10-23 20:35:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:21,829 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 20:35:21,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:35:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 20:35:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:35:21,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:21,831 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:21,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:35:21,831 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:21,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1355596363, now seen corresponding path program 1 times [2020-10-23 20:35:21,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:21,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658598968] [2020-10-23 20:35:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:21,836 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:35:21,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658598968] [2020-10-23 20:35:21,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:21,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:35:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947438483] [2020-10-23 20:35:21,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:35:21,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:21,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:35:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:35:22,000 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-10-23 20:35:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:22,179 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-23 20:35:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:35:22,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-23 20:35:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:22,181 INFO L225 Difference]: With dead ends: 48 [2020-10-23 20:35:22,181 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 20:35:22,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:35:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 20:35:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-23 20:35:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 20:35:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 32 transitions. [2020-10-23 20:35:22,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 32 transitions. Word has length 32 [2020-10-23 20:35:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:22,192 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 32 transitions. [2020-10-23 20:35:22,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:35:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 32 transitions. [2020-10-23 20:35:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:35:22,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:22,194 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:22,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:35:22,194 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:22,195 INFO L82 PathProgramCache]: Analyzing trace with hash -959156811, now seen corresponding path program 1 times [2020-10-23 20:35:22,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814911625] [2020-10-23 20:35:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:22,198 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:35:22,216 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:35:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:35:22,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:35:22,282 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:35:22,283 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:35:22,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:35:22,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:35:22 BoogieIcfgContainer [2020-10-23 20:35:22,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:35:22,304 INFO L168 Benchmark]: Toolchain (without parser) took 2844.80 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 98.6 MB in the end (delta: 28.8 MB). Peak memory consumption was 30.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:22,305 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 123.6 MB in the beginning and 123.1 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:35:22,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:22,307 INFO L168 Benchmark]: Boogie Preprocessor took 38.63 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:22,308 INFO L168 Benchmark]: RCFGBuilder took 651.03 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 132.2 MB in the end (delta: -16.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:22,308 INFO L168 Benchmark]: TraceAbstraction took 1878.92 ms. Allocated memory is still 151.0 MB. Free memory was 131.7 MB in the beginning and 98.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:35:22,312 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 123.6 MB in the beginning and 123.1 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.58 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.63 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 651.03 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 132.2 MB in the end (delta: -16.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1878.92 ms. Allocated memory is still 151.0 MB. Free memory was 131.7 MB in the beginning and 98.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.6 MB. 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: [L14] struct dummy d1, d2; [L15] int n = __VERIFIER_nondet_int(); [L16] EXPR n ? &d1 : &d2 [L16] struct dummy *pd = n ? &d1 : &d2; [L17] COND TRUE pd == &d2 [L18] pd->a = 0 [L22] pd == &d2 && d2.b != 0 [L22] EXPR d2.b [L22] pd == &d2 && d2.b != 0 [L22] COND TRUE pd == &d2 && d2.b != 0 [L28] CALL reach_error() [L3] __assert_fail("0", "test28-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 126 SDslu, 229 SDs, 0 SdLazy, 201 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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, 3 MinimizatonAttempts, 9 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...