/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:57:52,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:57:52,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:57:52,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:57:52,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:57:52,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:57:52,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:57:52,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:57:52,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:57:52,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:57:52,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:57:52,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:57:52,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:57:52,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:57:52,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:57:52,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:57:52,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:57:52,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:57:52,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:57:52,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:57:52,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:57:52,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:57:52,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:57:52,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:57:52,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:57:52,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:57:52,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:57:52,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:57:52,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:57:52,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:57:52,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:57:52,956 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:57:52,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:57:52,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:57:52,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:57:52,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:57:52,958 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:57:52,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:57:52,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:57:52,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:57:52,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:57:52,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:57:52,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:57:52,959 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:57:52,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:57:53,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:57:53,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:57:53,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:57:53,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:57:53,381 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:57:53,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-22 01:57:53,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/759a27a5c/15fe034d47304e5085cfeb5cdd209d28/FLAG58aa10a8f [2021-02-22 01:57:53,981 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:57:53,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-22 01:57:53,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/759a27a5c/15fe034d47304e5085cfeb5cdd209d28/FLAG58aa10a8f [2021-02-22 01:57:54,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/759a27a5c/15fe034d47304e5085cfeb5cdd209d28 [2021-02-22 01:57:54,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:57:54,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:57:54,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:54,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:57:54,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:57:54,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@635783e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54, skipping insertion in model container [2021-02-22 01:57:54,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:57:54,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:57:54,689 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c[576,589] [2021-02-22 01:57:54,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:54,714 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:57:54,736 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c[576,589] [2021-02-22 01:57:54,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:54,760 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:57:54,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54 WrapperNode [2021-02-22 01:57:54,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:54,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:57:54,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:57:54,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:57:54,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... [2021-02-22 01:57:54,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:57:54,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:57:54,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:57:54,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:57:54,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:57:54,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:57:54,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:57:54,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:57:54,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:57:54,984 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:57:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:57:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:57:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:57:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:57:54,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:57:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:57:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:57:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:57:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:57:54,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:57:54,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:57:55,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:57:55,323 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:57:55,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:55 BoogieIcfgContainer [2021-02-22 01:57:55,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:57:55,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:57:55,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:57:55,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:57:55,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:57:54" (1/3) ... [2021-02-22 01:57:55,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641fc5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:55, skipping insertion in model container [2021-02-22 01:57:55,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:54" (2/3) ... [2021-02-22 01:57:55,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641fc5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:55, skipping insertion in model container [2021-02-22 01:57:55,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:55" (3/3) ... [2021-02-22 01:57:55,335 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2021-02-22 01:57:55,344 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:57:55,352 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:57:55,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:57:55,430 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:57:55,430 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:57:55,430 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:57:55,431 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:57:55,431 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:57:55,431 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:57:55,431 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:57:55,431 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:57:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-22 01:57:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-22 01:57:55,474 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:55,476 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] [2021-02-22 01:57:55,476 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1684913090, now seen corresponding path program 1 times [2021-02-22 01:57:55,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:55,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81243267] [2021-02-22 01:57:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:55,601 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:55,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:55,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:55,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:55,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-22 01:57:55,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:55,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:55,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:55,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:55,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:57:55,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81243267] [2021-02-22 01:57:55,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:55,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:57:55,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418732034] [2021-02-22 01:57:55,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:57:55,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:55,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:57:55,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:57:55,942 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2021-02-22 01:57:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:56,142 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-02-22 01:57:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:57:56,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-22 01:57:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:56,156 INFO L225 Difference]: With dead ends: 60 [2021-02-22 01:57:56,156 INFO L226 Difference]: Without dead ends: 34 [2021-02-22 01:57:56,160 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 [2021-02-22 01:57:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-22 01:57:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-22 01:57:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-22 01:57:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-02-22 01:57:56,214 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-02-22 01:57:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:56,216 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-02-22 01:57:56,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:57:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-02-22 01:57:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 01:57:56,218 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:56,218 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] [2021-02-22 01:57:56,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:57:56,219 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash 536824223, now seen corresponding path program 1 times [2021-02-22 01:57:56,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:56,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053581185] [2021-02-22 01:57:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:56,224 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:56,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:56,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:56,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:56,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:56,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:56,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:56,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-22 01:57:56,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:56,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:56,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:57:56,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053581185] [2021-02-22 01:57:56,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:56,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:57:56,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178665438] [2021-02-22 01:57:56,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:57:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:56,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:57:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:57:56,596 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 9 states. [2021-02-22 01:57:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:56,907 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-02-22 01:57:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:57:56,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-02-22 01:57:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:56,909 INFO L225 Difference]: With dead ends: 43 [2021-02-22 01:57:56,909 INFO L226 Difference]: Without dead ends: 33 [2021-02-22 01:57:56,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-02-22 01:57:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-22 01:57:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-22 01:57:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-22 01:57:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-02-22 01:57:56,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-02-22 01:57:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:56,923 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-02-22 01:57:56,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:57:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-02-22 01:57:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 01:57:56,924 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:56,924 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] [2021-02-22 01:57:56,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:57:56,925 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2041206465, now seen corresponding path program 1 times [2021-02-22 01:57:56,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:56,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328769465] [2021-02-22 01:57:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:56,928 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:56,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:56,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:57:56,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:56,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:56,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:56,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:56,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:57,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:57,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:57,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:57:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328769465] [2021-02-22 01:57:57,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:57,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 01:57:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784284074] [2021-02-22 01:57:57,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 01:57:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:57,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 01:57:57,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:57:57,096 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 7 states. [2021-02-22 01:57:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:57,315 INFO L93 Difference]: Finished difference Result 46 states and 45 transitions. [2021-02-22 01:57:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 01:57:57,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-02-22 01:57:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:57,319 INFO L225 Difference]: With dead ends: 46 [2021-02-22 01:57:57,319 INFO L226 Difference]: Without dead ends: 32 [2021-02-22 01:57:57,320 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 [2021-02-22 01:57:57,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-22 01:57:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-02-22 01:57:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-22 01:57:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions. [2021-02-22 01:57:57,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 31 [2021-02-22 01:57:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:57,344 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions. [2021-02-22 01:57:57,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 01:57:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2021-02-22 01:57:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 01:57:57,345 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:57,346 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] [2021-02-22 01:57:57,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:57:57,349 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:57,350 INFO L82 PathProgramCache]: Analyzing trace with hash -143124065, now seen corresponding path program 1 times [2021-02-22 01:57:57,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:57,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309589057] [2021-02-22 01:57:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:57,352 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:57,393 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:57,419 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:57,450 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:57:57,450 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:57:57,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:57:57,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:57:57 BoogieIcfgContainer [2021-02-22 01:57:57,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:57:57,471 INFO L168 Benchmark]: Toolchain (without parser) took 3111.88 ms. Allocated memory is still 165.7 MB. Free memory was 123.9 MB in the beginning and 105.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:57,472 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 165.7 MB. Free memory is still 140.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:57:57,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.49 ms. Allocated memory is still 165.7 MB. Free memory was 122.7 MB in the beginning and 112.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:57,474 INFO L168 Benchmark]: Boogie Preprocessor took 63.32 ms. Allocated memory is still 165.7 MB. Free memory was 112.6 MB in the beginning and 111.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:57,475 INFO L168 Benchmark]: RCFGBuilder took 497.79 ms. Allocated memory is still 165.7 MB. Free memory was 111.0 MB in the beginning and 134.1 MB in the end (delta: -23.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:57,475 INFO L168 Benchmark]: TraceAbstraction took 2142.81 ms. Allocated memory is still 165.7 MB. Free memory was 133.5 MB in the beginning and 105.2 MB in the end (delta: 28.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:57,479 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 165.7 MB. Free memory is still 140.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 388.49 ms. Allocated memory is still 165.7 MB. Free memory was 122.7 MB in the beginning and 112.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.32 ms. Allocated memory is still 165.7 MB. Free memory was 112.6 MB in the beginning and 111.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 497.79 ms. Allocated memory is still 165.7 MB. Free memory was 111.0 MB in the beginning and 134.1 MB in the end (delta: -23.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2142.81 ms. Allocated memory is still 165.7 MB. Free memory was 133.5 MB in the beginning and 105.2 MB in the end (delta: 28.3 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call to reach_error is reachable a call to reach_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] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 97 SDslu, 225 SDs, 0 SdLazy, 184 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 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...