/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/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:29:19,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:29:19,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:29:19,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:29:19,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:29:19,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:29:19,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:29:19,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:29:19,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:29:19,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:29:19,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:29:19,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:29:19,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:29:19,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:29:19,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:29:19,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:29:19,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:29:19,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:29:19,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:29:19,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:29:19,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:29:19,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:29:19,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:29:19,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:29:19,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 13:29:19,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 13:29:19,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 13:29:19,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 13:29:19,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 13:29:19,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 13:29:19,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 13:29:19,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 13:29:19,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 13:29:19,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 13:29:19,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 13:29:19,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 13:29:19,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 13:29:19,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 13:29:19,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:29:19,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:29:19,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:29:19,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 13:29:19,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:29:19,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:29:19,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:29:19,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:29:19,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:29:19,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:29:19,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:29:19,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:29:19,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:29:19,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:29:19,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:29:19,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:29:19,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:29:19,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:29:19,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:29:19,949 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:29:19,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:29:19,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:29:19,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:29:19,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:29:19,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:29:19,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:29:19,950 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:29:20,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:29:20,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:29:20,265 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:29:20,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:29:20,267 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:29:20,268 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-07-17 13:29:20,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d07d50c7/51f8a273c5f843e6a2d48cdb76623473/FLAGe35233b1e [2020-07-17 13:29:20,753 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:29:20,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c [2020-07-17 13:29:20,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d07d50c7/51f8a273c5f843e6a2d48cdb76623473/FLAGe35233b1e [2020-07-17 13:29:21,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d07d50c7/51f8a273c5f843e6a2d48cdb76623473 [2020-07-17 13:29:21,159 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:29:21,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:29:21,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:29:21,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:29:21,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:29:21,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec38cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21, skipping insertion in model container [2020-07-17 13:29:21,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:29:21,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:29:21,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:29:21,371 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:29:21,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:29:21,404 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:29:21,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21 WrapperNode [2020-07-17 13:29:21,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:29:21,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:29:21,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:29:21,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:29:21,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:29:21,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:29:21,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:29:21,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:29:21,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (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 [2020-07-17 13:29:21,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:29:21,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:29:21,599 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-17 13:29:21,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:29:21,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:29:21,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 13:29:21,911 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:29:21,912 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 13:29:21,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:29:21 BoogieIcfgContainer [2020-07-17 13:29:21,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:29:21,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:29:21,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:29:21,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:29:21,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:29:21" (1/3) ... [2020-07-17 13:29:21,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d0063d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:29:21, skipping insertion in model container [2020-07-17 13:29:21,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (2/3) ... [2020-07-17 13:29:21,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d0063d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:29:21, skipping insertion in model container [2020-07-17 13:29:21,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:29:21" (3/3) ... [2020-07-17 13:29:21,924 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-07-17 13:29:21,932 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:29:21,938 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:29:21,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:29:21,970 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:29:21,971 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:29:21,971 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:29:21,971 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:29:21,971 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:29:21,971 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:29:21,972 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:29:21,972 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:29:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-07-17 13:29:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 13:29:21,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:29:21,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:29:21,999 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:29:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:29:22,005 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-07-17 13:29:22,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:29:22,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232475800] [2020-07-17 13:29:22,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:29:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:29:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:29:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:29:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:29:22,500 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:29:22,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232475800] [2020-07-17 13:29:22,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:29:22,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 13:29:22,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104083081] [2020-07-17 13:29:22,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 13:29:22,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:29:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 13:29:22,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 13:29:22,530 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 9 states. [2020-07-17 13:29:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:29:22,922 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-07-17 13:29:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 13:29:22,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-07-17 13:29:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:29:22,950 INFO L225 Difference]: With dead ends: 71 [2020-07-17 13:29:22,951 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 13:29:22,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-07-17 13:29:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 13:29:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-17 13:29:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 13:29:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-07-17 13:29:23,003 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-07-17 13:29:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:29:23,004 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-07-17 13:29:23,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 13:29:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-07-17 13:29:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-17 13:29:23,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:29:23,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:29:23,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:29:23,007 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:29:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:29:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-07-17 13:29:23,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:29:23,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824262439] [2020-07-17 13:29:23,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:29:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:29:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:29:23,135 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:29:23,135 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 13:29:23,136 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 13:29:23,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:29:23,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:29:23 BoogieIcfgContainer [2020-07-17 13:29:23,155 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:29:23,157 INFO L168 Benchmark]: Toolchain (without parser) took 1995.60 ms. Allocated memory was 134.7 MB in the beginning and 224.4 MB in the end (delta: 89.7 MB). Free memory was 100.4 MB in the beginning and 184.1 MB in the end (delta: -83.6 MB). Peak memory consumption was 6.0 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,158 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 134.7 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.90 ms. Allocated memory is still 134.7 MB. Free memory was 100.2 MB in the beginning and 90.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,161 INFO L168 Benchmark]: Boogie Preprocessor took 122.49 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 90.3 MB in the beginning and 176.2 MB in the end (delta: -85.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,161 INFO L168 Benchmark]: RCFGBuilder took 387.46 ms. Allocated memory is still 198.2 MB. Free memory was 176.2 MB in the beginning and 159.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,163 INFO L168 Benchmark]: TraceAbstraction took 1237.77 ms. Allocated memory was 198.2 MB in the beginning and 224.4 MB in the end (delta: 26.2 MB). Free memory was 159.1 MB in the beginning and 184.1 MB in the end (delta: -25.0 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,167 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 134.7 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.90 ms. Allocated memory is still 134.7 MB. Free memory was 100.2 MB in the beginning and 90.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.49 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 90.3 MB in the beginning and 176.2 MB in the end (delta: -85.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.46 ms. Allocated memory is still 198.2 MB. Free memory was 176.2 MB in the beginning and 159.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1237.77 ms. Allocated memory was 198.2 MB in the beginning and 224.4 MB in the end (delta: 26.2 MB). Free memory was 159.1 MB in the beginning and 184.1 MB in the end (delta: -25.0 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int a, b; [L5] int *p1, *p2; [L19] p1 = &a [L20] p2 = &b [L22] b = 1 [L23] a = 5 [L25] EXPR \read(a) [L25] a-- [L27] CALL, EXPR f() [L8] EXPR \read(*p1) [L8] EXPR \read(*p2) [L8] EXPR \read(a) [L8] int v = *p1 + *p2 - a; [L9] COND TRUE v == 1 [L10] p1 = p2 [L11] return v; [L27] RET, EXPR f() [L27] a = f() [L29] EXPR \read(a) [L29] COND TRUE a && p1 == p2 [L36] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 149 SDslu, 78 SDs, 0 SdLazy, 107 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s 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, 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...