/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 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=0.2 --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 -i ../../../trunk/examples/svcomp/bitvector/gcd_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:33:05,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:33:05,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:33:05,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:33:05,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:33:05,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:33:05,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:33:05,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:33:05,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:33:05,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:33:05,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:33:05,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:33:05,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:33:05,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:33:05,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:33:05,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:33:05,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:33:05,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:33:05,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:33:05,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:33:05,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:33:05,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:33:05,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:33:05,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:33:05,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:33:05,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:33:05,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:33:05,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:33:05,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:33:05,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:33:05,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:33:05,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:33:05,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:33:05,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:33:05,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:33:05,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:33:05,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:33:05,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:33:05,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:33:05,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:33:05,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:33:05,903 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 [2020-10-14 18:33:05,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:33:05,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:33:05,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:33:05,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:33:05,942 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:33:05,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:33:05,943 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:33:05,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:33:05,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:33:05,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:33:05,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:33:05,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:33:05,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:33:05,945 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:33:05,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:33:05,946 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:33:05,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:33:05,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:33:05,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:33:05,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:33:05,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:33:05,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:33:05,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:33:05,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:33:05,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:33:05,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:33:05,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:33:05,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:33:05,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:33:05,949 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 -> 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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:33:06,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:33:06,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:33:06,255 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:33:06,257 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:33:06,257 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:33:06,258 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_1.c [2020-10-14 18:33:06,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4765424d/9c9c9c7b4146468ca56f35a7002de020/FLAG6d0d208cb [2020-10-14 18:33:06,715 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:33:06,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_1.c [2020-10-14 18:33:06,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4765424d/9c9c9c7b4146468ca56f35a7002de020/FLAG6d0d208cb [2020-10-14 18:33:07,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4765424d/9c9c9c7b4146468ca56f35a7002de020 [2020-10-14 18:33:07,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:33:07,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:33:07,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:33:07,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:33:07,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:33:07,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfafcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07, skipping insertion in model container [2020-10-14 18:33:07,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:33:07,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:33:07,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:33:07,341 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:33:07,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:33:07,376 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:33:07,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07 WrapperNode [2020-10-14 18:33:07,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:33:07,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:33:07,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:33:07,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:33:07,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (1/1) ... [2020-10-14 18:33:07,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:33:07,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:33:07,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:33:07,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:33:07,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (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 [2020-10-14 18:33:07,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:33:07,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:33:07,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:33:07,583 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-10-14 18:33:07,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:33:07,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:33:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 18:33:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:33:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-10-14 18:33:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:33:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:33:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:33:07,799 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:33:07,800 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 18:33:07,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:33:07 BoogieIcfgContainer [2020-10-14 18:33:07,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:33:07,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:33:07,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:33:07,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:33:07,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:33:07" (1/3) ... [2020-10-14 18:33:07,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5586f221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:33:07, skipping insertion in model container [2020-10-14 18:33:07,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:33:07" (2/3) ... [2020-10-14 18:33:07,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5586f221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:33:07, skipping insertion in model container [2020-10-14 18:33:07,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:33:07" (3/3) ... [2020-10-14 18:33:07,812 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2020-10-14 18:33:07,824 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:33:07,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:33:07,866 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:33:07,930 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:33:07,930 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:33:07,930 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:33:07,930 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:33:07,930 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:33:07,931 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:33:07,931 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:33:07,931 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:33:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 18:33:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 18:33:07,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:33:07,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:33:07,960 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:33:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:33:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1582230590, now seen corresponding path program 1 times [2020-10-14 18:33:07,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:33:07,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763003350] [2020-10-14 18:33:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:33:08,062 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-14 18:33:08,063 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-14 18:33:08,063 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 18:33:08,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:33:08,081 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-14 18:33:08,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 06:33:08 BoogieIcfgContainer [2020-10-14 18:33:08,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 18:33:08,084 INFO L168 Benchmark]: Toolchain (without parser) took 964.66 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 102.7 MB in the beginning and 157.4 MB in the end (delta: -54.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-10-14 18:33:08,085 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-14 18:33:08,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.73 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-14 18:33:08,088 INFO L168 Benchmark]: Boogie Preprocessor took 133.59 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-10-14 18:33:08,089 INFO L168 Benchmark]: RCFGBuilder took 292.53 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-10-14 18:33:08,090 INFO L168 Benchmark]: TraceAbstraction took 276.13 ms. Allocated memory is still 203.9 MB. Free memory was 169.1 MB in the beginning and 157.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-10-14 18:33:08,094 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.73 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.59 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 292.53 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 169.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 276.13 ms. Allocated memory is still 203.9 MB. Free memory was 169.1 MB in the beginning and 157.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: 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: [L28] signed char x = __VERIFIER_nondet_char(); [L29] signed char y = __VERIFIER_nondet_char(); [L30] signed char g; [L32] COND TRUE y > 0 && x % y == 0 [L33] CALL, EXPR gcd_test(x, y) [L12] signed char t; [L14] COND FALSE !(a < 0) [L15] COND TRUE b < 0 [L15] b = -b [L22] return a; [L33] RET, EXPR gcd_test(x, y) [L33] g = gcd_test(x, y) [L35] CALL __VERIFIER_assert(g == y) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 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=27occurred 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...