/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 --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 SequenceOfStatements --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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/nla-digbench/egcd2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:38:14,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:38:14,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:38:14,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:38:14,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:38:14,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:38:14,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:38:14,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:38:14,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:38:14,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:38:14,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:38:14,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:38:14,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:38:14,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:38:14,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:38:14,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:38:14,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:38:14,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:38:14,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:38:14,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:38:14,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:38:14,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:38:14,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:38:14,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:38:14,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:38:14,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:38:14,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:38:14,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:38:14,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:38:14,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:38:14,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:38:14,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:38:14,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:38:14,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:38:14,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:38:14,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:38:14,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:38:14,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:38:14,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:38:14,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:38:14,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:38:14,139 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 [2020-10-27 20:38:14,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:38:14,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:38:14,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:38:14,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:38:14,198 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:38:14,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:38:14,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:38:14,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:38:14,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:38:14,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:38:14,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:38:14,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:38:14,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:38:14,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:38:14,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:38:14,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:38:14,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:38:14,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:38:14,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:38:14,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:38:14,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:38:14,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:38:14,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:38:14,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:38:14,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:38:14,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:38:14,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:38:14,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:38:14,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:38:14,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:38:14,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:38:14,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:38:14,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:38:14,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:38:14,649 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:38:14,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2.c [2020-10-27 20:38:14,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b61474168/e337701c5bfc41ffb7020768758925d7/FLAG6481bf8ff [2020-10-27 20:38:15,527 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:38:15,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/egcd2.c [2020-10-27 20:38:15,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b61474168/e337701c5bfc41ffb7020768758925d7/FLAG6481bf8ff [2020-10-27 20:38:15,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b61474168/e337701c5bfc41ffb7020768758925d7 [2020-10-27 20:38:15,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:38:15,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:38:15,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:38:15,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:38:15,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:38:15,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:38:15" (1/1) ... [2020-10-27 20:38:15,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104476a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:15, skipping insertion in model container [2020-10-27 20:38:15,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:38:15" (1/1) ... [2020-10-27 20:38:15,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:38:15,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:38:16,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:38:16,167 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:38:16,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:38:16,231 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:38:16,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16 WrapperNode [2020-10-27 20:38:16,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:38:16,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:38:16,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:38:16,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:38:16,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (1/1) ... [2020-10-27 20:38:16,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (1/1) ... [2020-10-27 20:38:16,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (1/1) ... [2020-10-27 20:38:16,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (1/1) ... [2020-10-27 20:38:16,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (1/1) ... [2020-10-27 20:38:16,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (1/1) ... [2020-10-27 20:38:16,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (1/1) ... [2020-10-27 20:38:16,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:38:16,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:38:16,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:38:16,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:38:16,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (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 [2020-10-27 20:38:16,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:38:16,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:38:16,418 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:38:16,418 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:38:16,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:38:16,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:38:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:38:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:38:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:38:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:38:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:38:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:38:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:38:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:38:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:38:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:38:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:38:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:38:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:38:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:38:16,860 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:38:16,861 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 20:38:16,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:38:16 BoogieIcfgContainer [2020-10-27 20:38:16,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:38:16,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:38:16,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:38:16,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:38:16,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:38:15" (1/3) ... [2020-10-27 20:38:16,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e49b0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:38:16, skipping insertion in model container [2020-10-27 20:38:16,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:38:16" (2/3) ... [2020-10-27 20:38:16,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e49b0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:38:16, skipping insertion in model container [2020-10-27 20:38:16,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:38:16" (3/3) ... [2020-10-27 20:38:16,881 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2.c [2020-10-27 20:38:16,908 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:38:16,913 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:38:16,932 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:38:16,979 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:38:16,979 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:38:16,980 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:38:16,980 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:38:16,980 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:38:16,981 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:38:16,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:38:16,981 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:38:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-27 20:38:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:38:17,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:38:17,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:38:17,018 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:38:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:38:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1198668448, now seen corresponding path program 1 times [2020-10-27 20:38:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:38:17,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235090206] [2020-10-27 20:38:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:38:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:38:17,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:38:17,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235090206] [2020-10-27 20:38:17,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-10-27 20:38:17,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:38:17,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-27 20:38:17,541 ERROR L205 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-10-27 20:38:17,542 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 20:38:17,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:38:17,562 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-27 20:38:17,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:38:17 BoogieIcfgContainer [2020-10-27 20:38:17,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:38:17,565 INFO L168 Benchmark]: Toolchain (without parser) took 1692.72 ms. Allocated memory is still 158.3 MB. Free memory was 133.7 MB in the beginning and 118.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2020-10-27 20:38:17,566 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 158.3 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:38:17,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.16 ms. Allocated memory is still 158.3 MB. Free memory was 133.1 MB in the beginning and 122.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:38:17,569 INFO L168 Benchmark]: Boogie Preprocessor took 79.55 ms. Allocated memory is still 158.3 MB. Free memory was 122.8 MB in the beginning and 121.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 20:38:17,570 INFO L168 Benchmark]: RCFGBuilder took 546.69 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 137.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2020-10-27 20:38:17,571 INFO L168 Benchmark]: TraceAbstraction took 698.33 ms. Allocated memory is still 158.3 MB. Free memory was 137.9 MB in the beginning and 118.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-27 20:38:17,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 158.3 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 353.16 ms. Allocated memory is still 158.3 MB. Free memory was 133.1 MB in the beginning and 122.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.55 ms. Allocated memory is still 158.3 MB. Free memory was 122.8 MB in the beginning and 121.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 546.69 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 137.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 698.33 ms. Allocated memory is still 158.3 MB. Free memory was 137.9 MB in the beginning and 118.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] int a, b, p, q, r, s, c, k; [L21] x = __VERIFIER_nondet_int() [L22] y = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(x >= 1) [L8] COND TRUE !cond [L23] RET assume_abort_if_not(x >= 1) [L24] CALL assume_abort_if_not(y >= 1) [L8] COND TRUE !cond [L24] RET assume_abort_if_not(y >= 1) [L26] a = x [L27] b = y [L28] p = 1 [L29] q = 0 [L30] r = 0 [L31] s = 1 [L32] c = 0 [L33] k = 0 [L64] CALL __VERIFIER_assert(q*x + s*y == 0) [L11] COND TRUE !(cond) [L13] CALL reach_error() [L4] __assert_fail("0", "egcd2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.5s, 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=38occurred 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, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...