/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 04:14:37,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 04:14:37,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 04:14:37,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 04:14:37,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 04:14:37,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 04:14:37,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 04:14:37,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 04:14:37,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 04:14:37,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 04:14:37,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 04:14:37,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 04:14:37,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 04:14:37,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 04:14:37,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 04:14:37,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 04:14:37,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 04:14:37,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 04:14:37,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 04:14:37,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 04:14:37,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 04:14:37,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 04:14:37,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 04:14:37,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 04:14:37,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 04:14:37,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 04:14:37,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 04:14:37,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 04:14:37,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 04:14:37,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 04:14:37,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 04:14:37,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 04:14:37,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 04:14:37,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 04:14:37,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 04:14:37,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 04:14:37,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 04:14:37,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 04:14:37,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 04:14:37,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 04:14:37,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 04:14:37,325 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 [2020-10-29 04:14:37,380 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 04:14:37,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 04:14:37,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 04:14:37,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 04:14:37,384 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 04:14:37,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 04:14:37,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 04:14:37,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 04:14:37,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 04:14:37,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 04:14:37,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 04:14:37,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 04:14:37,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 04:14:37,388 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 04:14:37,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 04:14:37,388 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 04:14:37,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 04:14:37,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 04:14:37,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 04:14:37,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 04:14:37,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 04:14:37,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 04:14:37,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 04:14:37,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 04:14:37,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 04:14:37,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 04:14:37,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 04:14:37,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 04:14:37,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 04:14:37,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 04:14:37,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 04:14:37,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 04:14:37,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 04:14:37,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 04:14:37,879 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 04:14:37,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-10-29 04:14:37,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147d2013b/efbd29f95d18434f83b878d411e76b8a/FLAG429454932 [2020-10-29 04:14:38,714 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 04:14:38,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_4.c [2020-10-29 04:14:38,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147d2013b/efbd29f95d18434f83b878d411e76b8a/FLAG429454932 [2020-10-29 04:14:39,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147d2013b/efbd29f95d18434f83b878d411e76b8a [2020-10-29 04:14:39,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 04:14:39,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 04:14:39,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 04:14:39,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 04:14:39,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 04:14:39,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4918ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39, skipping insertion in model container [2020-10-29 04:14:39,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 04:14:39,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 04:14:39,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:14:39,334 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 04:14:39,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:14:39,374 INFO L208 MainTranslator]: Completed translation [2020-10-29 04:14:39,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39 WrapperNode [2020-10-29 04:14:39,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 04:14:39,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 04:14:39,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 04:14:39,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 04:14:39,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (1/1) ... [2020-10-29 04:14:39,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 04:14:39,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 04:14:39,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 04:14:39,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 04:14:39,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (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 [2020-10-29 04:14:39,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 04:14:39,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 04:14:39,517 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 04:14:39,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 04:14:39,518 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-10-29 04:14:39,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 04:14:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 04:14:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 04:14:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 04:14:39,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 04:14:39,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 04:14:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 04:14:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-10-29 04:14:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 04:14:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 04:14:39,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 04:14:39,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 04:14:39,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 04:14:39,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 04:14:39,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 04:14:39,978 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 04:14:39,978 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 04:14:39,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:14:39 BoogieIcfgContainer [2020-10-29 04:14:39,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 04:14:39,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 04:14:39,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 04:14:39,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 04:14:39,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:14:39" (1/3) ... [2020-10-29 04:14:39,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abaa3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:14:39, skipping insertion in model container [2020-10-29 04:14:39,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:39" (2/3) ... [2020-10-29 04:14:39,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abaa3d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:14:39, skipping insertion in model container [2020-10-29 04:14:39,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:14:39" (3/3) ... [2020-10-29 04:14:39,996 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-10-29 04:14:40,009 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 04:14:40,015 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 04:14:40,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 04:14:40,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 04:14:40,082 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 04:14:40,082 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 04:14:40,082 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 04:14:40,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 04:14:40,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 04:14:40,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 04:14:40,083 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 04:14:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-29 04:14:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 04:14:40,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:14:40,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:14:40,110 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:14:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:14:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1323676825, now seen corresponding path program 1 times [2020-10-29 04:14:40,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:14:40,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109933200] [2020-10-29 04:14:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:14:40,267 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-29 04:14:40,267 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-29 04:14:40,267 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 04:14:40,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 04:14:40,288 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-29 04:14:40,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:14:40 BoogieIcfgContainer [2020-10-29 04:14:40,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 04:14:40,292 INFO L168 Benchmark]: Toolchain (without parser) took 1207.36 ms. Allocated memory was 125.8 MB in the beginning and 165.7 MB in the end (delta: 39.8 MB). Free memory was 101.4 MB in the beginning and 140.6 MB in the end (delta: -39.2 MB). Peak memory consumption was 1.7 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:40,293 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 04:14:40,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.02 ms. Allocated memory is still 125.8 MB. Free memory was 100.7 MB in the beginning and 91.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:40,295 INFO L168 Benchmark]: Boogie Preprocessor took 40.64 ms. Allocated memory is still 125.8 MB. Free memory was 91.4 MB in the beginning and 89.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:40,297 INFO L168 Benchmark]: RCFGBuilder took 564.37 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 75.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:40,298 INFO L168 Benchmark]: TraceAbstraction took 301.03 ms. Allocated memory was 125.8 MB in the beginning and 165.7 MB in the end (delta: 39.8 MB). Free memory was 75.4 MB in the beginning and 140.6 MB in the end (delta: -65.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 04:14:40,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.02 ms. Allocated memory is still 125.8 MB. Free memory was 100.7 MB in the beginning and 91.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.64 ms. Allocated memory is still 125.8 MB. Free memory was 91.4 MB in the beginning and 89.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 564.37 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 75.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 301.03 ms. Allocated memory was 125.8 MB in the beginning and 165.7 MB in the end (delta: 39.8 MB). Free memory was 75.4 MB in the beginning and 140.6 MB in the end (delta: -65.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: 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: [L34] long x; [L35] long y; [L36] long g; [L38] x = 63 [L39] y = 18 [L41] CALL, EXPR gcd_test(x, y) [L14] COND FALSE !(a < 0) [L15] COND TRUE b < 0 [L15] b = -b [L17] COND TRUE a == 0 [L18] return b; [L41] RET, EXPR gcd_test(x, y) [L41] g = gcd_test(x, y) [L43] CALL __VERIFIER_assert(x % g == 0) [L7] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "gcd_4.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.1s, 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=35occurred 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: 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...