/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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/test21-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:23:16,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:23:16,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:23:16,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:23:16,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:23:16,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:23:16,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:23:16,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:23:16,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:23:16,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:23:16,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:23:16,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:23:16,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:23:16,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:23:16,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:23:16,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:23:16,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:23:16,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:23:16,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:23:16,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:23:16,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:23:16,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:23:16,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:23:16,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:23:16,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:23:16,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:23:16,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:23:16,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:23:16,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:23:16,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:23:16,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:23:16,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:23:16,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:23:16,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:23:16,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:23:16,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:23:16,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:23:16,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:23:16,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:23:16,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:23:16,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:23:16,079 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 [2020-09-25 04:23:16,105 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:23:16,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:23:16,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:23:16,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:23:16,107 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:23:16,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:23:16,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:23:16,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:23:16,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:23:16,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:23:16,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:23:16,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:23:16,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:23:16,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:23:16,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:23:16,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:23:16,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:23:16,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:23:16,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:23:16,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:23:16,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:23:16,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:23:16,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:23:16,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:23:16,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:23:16,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:23:16,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:23:16,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:23:16,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:23:16,112 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.rcfgbuilder: Size of a code block -> SingleStatement 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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:23:16,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:23:16,639 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:23:16,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:23:16,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:23:16,648 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:23:16,649 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test21-2.c [2020-09-25 04:23:16,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f4827587/8765ba14259942dabda22947ea952366/FLAG695b42313 [2020-09-25 04:23:17,359 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:23:17,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test21-2.c [2020-09-25 04:23:17,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f4827587/8765ba14259942dabda22947ea952366/FLAG695b42313 [2020-09-25 04:23:17,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f4827587/8765ba14259942dabda22947ea952366 [2020-09-25 04:23:17,703 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:23:17,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:23:17,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:23:17,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:23:17,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:23:17,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:23:17" (1/1) ... [2020-09-25 04:23:17,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e06715f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:17, skipping insertion in model container [2020-09-25 04:23:17,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:23:17" (1/1) ... [2020-09-25 04:23:17,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:23:17,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:23:18,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:23:18,040 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:23:18,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:23:18,102 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:23:18,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18 WrapperNode [2020-09-25 04:23:18,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:23:18,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:23:18,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:23:18,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:23:18,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (1/1) ... [2020-09-25 04:23:18,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (1/1) ... [2020-09-25 04:23:18,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (1/1) ... [2020-09-25 04:23:18,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (1/1) ... [2020-09-25 04:23:18,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (1/1) ... [2020-09-25 04:23:18,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (1/1) ... [2020-09-25 04:23:18,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (1/1) ... [2020-09-25 04:23:18,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:23:18,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:23:18,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:23:18,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:23:18,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (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 [2020-09-25 04:23:18,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:23:18,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:23:18,417 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 04:23:18,417 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-09-25 04:23:18,417 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 04:23:18,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:23:18,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:23:18,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:23:18,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 04:23:18,419 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 04:23:18,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 04:23:18,419 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-09-25 04:23:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 04:23:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 04:23:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:23:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:23:18,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 04:23:18,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-25 04:23:18,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:23:18,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 04:23:18,773 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:23:18,774 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 04:23:18,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:23:18 BoogieIcfgContainer [2020-09-25 04:23:18,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:23:18,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:23:18,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:23:18,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:23:18,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:23:17" (1/3) ... [2020-09-25 04:23:18,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148d2140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:23:18, skipping insertion in model container [2020-09-25 04:23:18,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:18" (2/3) ... [2020-09-25 04:23:18,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148d2140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:23:18, skipping insertion in model container [2020-09-25 04:23:18,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:23:18" (3/3) ... [2020-09-25 04:23:18,802 INFO L109 eAbstractionObserver]: Analyzing ICFG test21-2.c [2020-09-25 04:23:18,831 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:23:18,842 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:23:18,865 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:23:18,895 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:23:18,896 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:23:18,896 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:23:18,896 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:23:18,896 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:23:18,896 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:23:18,896 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:23:18,896 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:23:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-09-25 04:23:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 04:23:18,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:18,936 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:23:18,936 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:18,944 INFO L82 PathProgramCache]: Analyzing trace with hash -487286935, now seen corresponding path program 1 times [2020-09-25 04:23:18,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:18,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665554419] [2020-09-25 04:23:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 04:23:19,205 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 04:23:19,206 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 04:23:19,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:23:19,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:23:19 BoogieIcfgContainer [2020-09-25 04:23:19,234 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:23:19,238 INFO L168 Benchmark]: Toolchain (without parser) took 1531.16 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 101.7 MB in the beginning and 146.2 MB in the end (delta: -44.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:19,239 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 04:23:19,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.05 ms. Allocated memory is still 145.8 MB. Free memory was 101.1 MB in the beginning and 90.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:19,241 INFO L168 Benchmark]: Boogie Preprocessor took 217.72 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 90.9 MB in the beginning and 181.8 MB in the end (delta: -90.9 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:19,243 INFO L168 Benchmark]: RCFGBuilder took 456.60 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 161.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:19,244 INFO L168 Benchmark]: TraceAbstraction took 441.39 ms. Allocated memory is still 204.5 MB. Free memory was 161.8 MB in the beginning and 146.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:19,248 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 393.05 ms. Allocated memory is still 145.8 MB. Free memory was 101.1 MB in the beginning and 90.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 217.72 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 90.9 MB in the beginning and 181.8 MB in the end (delta: -90.9 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 456.60 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 161.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 441.39 ms. Allocated memory is still 204.5 MB. Free memory was 161.8 MB in the beginning and 146.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 42]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] struct dummy d1, d2; [L32] CALL init() [L13] d1.a = __VERIFIER_nondet_int() [L14] d1.b = __VERIFIER_nondet_int() [L16] d2.a = __VERIFIER_nondet_int() [L17] d2.b = __VERIFIER_nondet_int() [L32] RET init() [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L33] CALL, EXPR get_dummy() [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L33] RET, EXPR get_dummy() [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L34] COND TRUE pd1 != 0 && pd1 == pd2 [L35] CALL, EXPR check(pd1, pd2) [L27] EXPR s1->a [L27] EXPR s2->b [L27] return s1->a == s2->b; [L35] RET, EXPR check(pd1, pd2) [L35] COND TRUE !check(pd1, pd2) [L42] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 65 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 2, 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=65occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 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...