/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test26-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:50,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:50,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:50,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:50,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:50,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:50,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:50,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:50,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:50,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:50,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:50,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:50,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:50,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:50,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:50,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:50,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:50,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:50,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:50,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:50,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:50,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:50,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:50,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:50,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:50,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:50,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:50,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:50,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:50,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:50,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:50,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:50,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:50,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:50,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:50,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:50,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:50,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:50,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:50,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:50,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:50,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:23:51,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:51,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:51,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:51,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:51,037 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:51,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:51,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:51,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:51,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:51,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:51,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:51,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:51,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:51,040 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:51,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:51,041 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:51,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:51,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:51,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:51,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:51,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:51,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:51,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:51,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:51,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:51,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:51,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:51,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:51,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:51,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:51,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:51,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:51,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:51,538 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:51,539 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:51,540 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test26-2.c [2020-09-21 11:23:51,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0991db5f5/6858129d69a64d129d97770631c24174/FLAGc775b2aea [2020-09-21 11:23:52,140 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:52,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test26-2.c [2020-09-21 11:23:52,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0991db5f5/6858129d69a64d129d97770631c24174/FLAGc775b2aea [2020-09-21 11:23:52,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0991db5f5/6858129d69a64d129d97770631c24174 [2020-09-21 11:23:52,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:52,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:52,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:52,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:52,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:52,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143143ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52, skipping insertion in model container [2020-09-21 11:23:52,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:52,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:52,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:52,769 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:52,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:52,803 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:52,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52 WrapperNode [2020-09-21 11:23:52,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:52,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:52,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:52,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:52,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... [2020-09-21 11:23:52,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:52,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:52,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:52,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:52,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 11:23:53,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure assign [2020-09-21 11:23:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure assign [2020-09-21 11:23:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:23:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:23:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:23:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 11:23:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:53,247 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:53,248 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:23:53,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:53 BoogieIcfgContainer [2020-09-21 11:23:53,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:53,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:53,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:53,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:53,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:52" (1/3) ... [2020-09-21 11:23:53,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3e9bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:53, skipping insertion in model container [2020-09-21 11:23:53,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:52" (2/3) ... [2020-09-21 11:23:53,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3e9bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:53, skipping insertion in model container [2020-09-21 11:23:53,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:53" (3/3) ... [2020-09-21 11:23:53,265 INFO L109 eAbstractionObserver]: Analyzing ICFG test26-2.c [2020-09-21 11:23:53,280 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:53,293 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:53,321 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:53,361 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:53,361 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:53,361 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:53,362 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:53,362 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:53,362 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:53,362 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:53,362 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-21 11:23:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:23:53,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,402 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1573149608, now seen corresponding path program 1 times [2020-09-21 11:23:53,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855869027] [2020-09-21 11:23:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:23:53,595 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:23:53,596 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:23:53,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:53,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:53 BoogieIcfgContainer [2020-09-21 11:23:53,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:53,627 INFO L168 Benchmark]: Toolchain (without parser) took 1146.14 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 104.1 MB in the beginning and 157.2 MB in the end (delta: -53.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:53,628 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 148.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:23:53,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.57 ms. Allocated memory is still 148.9 MB. Free memory was 103.5 MB in the beginning and 93.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:53,631 INFO L168 Benchmark]: Boogie Preprocessor took 141.16 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 183.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:53,632 INFO L168 Benchmark]: RCFGBuilder took 309.35 ms. Allocated memory is still 205.5 MB. Free memory was 182.9 MB in the beginning and 170.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:53,633 INFO L168 Benchmark]: TraceAbstraction took 366.64 ms. Allocated memory is still 205.5 MB. Free memory was 169.8 MB in the beginning and 157.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:53,637 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 148.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.57 ms. Allocated memory is still 148.9 MB. Free memory was 103.5 MB in the beginning and 93.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.16 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 93.6 MB in the beginning and 183.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.35 ms. Allocated memory is still 205.5 MB. Free memory was 182.9 MB in the beginning and 170.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 366.64 ms. Allocated memory is still 205.5 MB. Free memory was 169.8 MB in the beginning and 157.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 24]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L3-L5] struct dummy { int a, b; } global = {0, 1}; [L14] struct dummy *pd = &global; [L16] CALL assign(&pd->b, &pd->b) [L9] EXPR \read(*pb) [L9] *pa = *pb [L16] RET assign(&pd->b, &pd->b) [L18] EXPR pd->a [L18] EXPR global.b [L18] COND TRUE pd->a != global.b [L24] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...