/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-72570d3 [2020-08-22 19:05:40,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:05:40,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:05:40,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:05:40,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:05:40,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:05:40,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:05:40,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:05:40,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:05:40,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:05:40,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:05:40,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:05:40,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:05:40,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:05:40,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:05:40,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:05:41,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:05:41,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:05:41,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:05:41,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:05:41,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:05:41,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:05:41,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:05:41,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:05:41,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:05:41,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:05:41,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:05:41,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:05:41,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:05:41,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:05:41,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:05:41,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:05:41,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:05:41,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:05:41,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:05:41,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:05:41,040 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:05:41,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:05:41,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:05:41,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:05:41,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:05:41,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:05:41,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:05:41,042 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:05:41,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:05:41,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:05:41,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:05:41,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:05:41,369 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:05:41,370 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-08-22 19:05:41,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2780942/16b45ce74ae74a5685087a625fb9fafa/FLAGfa31c8efd [2020-08-22 19:05:41,940 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:05:41,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-08-22 19:05:41,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2780942/16b45ce74ae74a5685087a625fb9fafa/FLAGfa31c8efd [2020-08-22 19:05:42,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba2780942/16b45ce74ae74a5685087a625fb9fafa [2020-08-22 19:05:42,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:05:42,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:05:42,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:05:42,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:05:42,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:05:42,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58419e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42, skipping insertion in model container [2020-08-22 19:05:42,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:05:42,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:05:42,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:05:42,591 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:05:42,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:05:42,621 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:05:42,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42 WrapperNode [2020-08-22 19:05:42,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:05:42,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:05:42,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:05:42,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:05:42,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (1/1) ... [2020-08-22 19:05:42,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:05:42,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:05:42,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:05:42,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:05:42,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (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 [2020-08-22 19:05:42,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:05:42,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:05:42,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:05:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:05:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:05:43,056 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:05:43,057 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 19:05:43,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:05:43 BoogieIcfgContainer [2020-08-22 19:05:43,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:05:43,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:05:43,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:05:43,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:05:43,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:05:42" (1/3) ... [2020-08-22 19:05:43,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cada46a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:05:43, skipping insertion in model container [2020-08-22 19:05:43,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:42" (2/3) ... [2020-08-22 19:05:43,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cada46a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:05:43, skipping insertion in model container [2020-08-22 19:05:43,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:05:43" (3/3) ... [2020-08-22 19:05:43,072 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-08-22 19:05:43,086 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:05:43,096 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:05:43,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:05:43,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:05:43,146 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:05:43,146 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:05:43,146 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:05:43,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:05:43,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:05:43,147 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:05:43,147 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:05:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-08-22 19:05:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 19:05:43,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:43,183 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] [2020-08-22 19:05:43,183 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash -374520961, now seen corresponding path program 1 times [2020-08-22 19:05:43,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:43,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838552345] [2020-08-22 19:05:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:43,270 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:43,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:05:43,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838552345] [2020-08-22 19:05:43,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:43,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:05:43,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163484087] [2020-08-22 19:05:43,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:05:43,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:43,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:05:43,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:05:43,494 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-08-22 19:05:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:43,646 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-08-22 19:05:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:05:43,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-22 19:05:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:43,668 INFO L225 Difference]: With dead ends: 54 [2020-08-22 19:05:43,668 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 19:05:43,675 INFO L675 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 [2020-08-22 19:05:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 19:05:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 19:05:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 19:05:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-22 19:05:43,721 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-08-22 19:05:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:43,722 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-22 19:05:43,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:05:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-22 19:05:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:05:43,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:43,724 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] [2020-08-22 19:05:43,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:05:43,725 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1400624444, now seen corresponding path program 1 times [2020-08-22 19:05:43,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:43,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961564615] [2020-08-22 19:05:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:43,729 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:05:43,752 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:05:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:05:43,771 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:05:43,798 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:05:43,799 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:05:43,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:05:43,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:05:43 BoogieIcfgContainer [2020-08-22 19:05:43,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:05:43,826 INFO L168 Benchmark]: Toolchain (without parser) took 1456.45 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 103.1 MB in the beginning and 128.2 MB in the end (delta: -25.1 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:43,827 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 19:05:43,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.23 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:43,829 INFO L168 Benchmark]: Boogie Preprocessor took 125.98 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.0 MB in the beginning and 181.8 MB in the end (delta: -88.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:43,830 INFO L168 Benchmark]: RCFGBuilder took 313.90 ms. Allocated memory is still 203.4 MB. Free memory was 181.2 MB in the beginning and 165.0 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:43,831 INFO L168 Benchmark]: TraceAbstraction took 760.61 ms. Allocated memory is still 203.4 MB. Free memory was 165.0 MB in the beginning and 128.2 MB in the end (delta: 36.8 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:43,835 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.23 ms. Allocated memory is still 147.3 MB. Free memory was 102.9 MB in the beginning and 93.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.98 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.0 MB in the beginning and 181.8 MB in the end (delta: -88.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.90 ms. Allocated memory is still 203.4 MB. Free memory was 181.2 MB in the beginning and 165.0 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 760.61 ms. Allocated memory is still 203.4 MB. Free memory was 165.0 MB in the beginning and 128.2 MB in the end (delta: 36.8 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L13] int n = __VERIFIER_nondet_int(); [L14] EXPR n ? &d1 : &d2 [L14] struct dummy *pd = n ? &d1 : &d2; [L15] COND TRUE pd == &d2 [L16] pd->a = 0 [L20] pd == &d2 && d2.b != 0 [L20] EXPR d2.b [L20] pd == &d2 && d2.b != 0 [L20] COND TRUE pd == &d2 && d2.b != 0 [L26] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 1 SDslu, 38 SDs, 0 SdLazy, 44 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...