/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/nla-digbench/fermat1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:12:50,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:12:50,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:12:50,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:12:50,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:12:50,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:12:50,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:12:50,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:12:50,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:12:50,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:12:50,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:12:50,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:12:50,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:12:50,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:12:50,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:12:50,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:12:50,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:12:50,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:12:50,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:12:50,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:12:50,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:12:50,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:12:50,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:12:50,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:12:50,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:12:50,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:12:50,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:12:50,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:12:50,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:12:50,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:12:50,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:12:50,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:12:50,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:12:50,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:12:50,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:12:50,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:12:50,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:12:50,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:12:50,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:12:50,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:12:50,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:12:50,915 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 [2020-10-15 00:12:50,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:12:50,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:12:50,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:12:50,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:12:50,986 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:12:50,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:12:50,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:12:50,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:12:50,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:12:50,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:12:50,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:12:50,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:12:50,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:12:50,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:12:50,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:12:50,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:12:50,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:12:50,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:12:50,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:12:50,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:12:50,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:12:50,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:12:50,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:12:50,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:12:50,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:12:50,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:12:50,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:12:50,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:12:50,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:12:50,992 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; [2020-10-15 00:12:51,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:12:51,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:12:51,332 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:12:51,333 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:12:51,334 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:12:51,335 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat1.c [2020-10-15 00:12:51,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a47a3eac/e66a3615edd04bb6a3e3220a28a06a7a/FLAGb0d55735d [2020-10-15 00:12:51,863 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:12:51,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/fermat1.c [2020-10-15 00:12:51,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a47a3eac/e66a3615edd04bb6a3e3220a28a06a7a/FLAGb0d55735d [2020-10-15 00:12:52,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a47a3eac/e66a3615edd04bb6a3e3220a28a06a7a [2020-10-15 00:12:52,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:12:52,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:12:52,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:12:52,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:12:52,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:12:52,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34fa96a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52, skipping insertion in model container [2020-10-15 00:12:52,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:12:52,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:12:52,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:12:52,422 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:12:52,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:12:52,458 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:12:52,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52 WrapperNode [2020-10-15 00:12:52,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:12:52,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:12:52,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:12:52,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:12:52,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... [2020-10-15 00:12:52,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:12:52,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:12:52,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:12:52,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:12:52,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:12:52,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:12:52,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:12:52,652 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 00:12:52,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:12:52,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:12:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:12:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-15 00:12:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 00:12:52,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 00:12:52,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:12:52,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:12:52,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:12:52,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:12:52,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:12:52,912 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-15 00:12:52,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:12:52 BoogieIcfgContainer [2020-10-15 00:12:52,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:12:52,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:12:52,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:12:52,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:12:52,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:12:52" (1/3) ... [2020-10-15 00:12:52,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77366d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:12:52, skipping insertion in model container [2020-10-15 00:12:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:12:52" (2/3) ... [2020-10-15 00:12:52,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77366d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:12:52, skipping insertion in model container [2020-10-15 00:12:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:12:52" (3/3) ... [2020-10-15 00:12:52,925 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat1.c [2020-10-15 00:12:52,935 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:12:52,943 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:12:52,955 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:12:52,978 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:12:52,979 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:12:52,979 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:12:52,979 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:12:52,979 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:12:52,979 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:12:52,979 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:12:52,979 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:12:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-15 00:12:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 00:12:53,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:53,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:53,004 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash 365515582, now seen corresponding path program 1 times [2020-10-15 00:12:53,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:53,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237453488] [2020-10-15 00:12:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:53,083 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-15 00:12:53,084 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-15 00:12:53,084 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 00:12:53,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:12:53,101 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-15 00:12:53,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 12:12:53 BoogieIcfgContainer [2020-10-15 00:12:53,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 00:12:53,105 INFO L168 Benchmark]: Toolchain (without parser) took 907.67 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 102.2 MB in the beginning and 154.1 MB in the end (delta: -51.9 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:53,105 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-15 00:12:53,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.42 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 92.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:53,108 INFO L168 Benchmark]: Boogie Preprocessor took 139.11 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.1 MB in the beginning and 179.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:53,108 INFO L168 Benchmark]: RCFGBuilder took 317.72 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 165.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:53,109 INFO L168 Benchmark]: TraceAbstraction took 184.33 ms. Allocated memory is still 202.4 MB. Free memory was 165.1 MB in the beginning and 154.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:53,113 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.42 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 92.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.11 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.1 MB in the beginning and 179.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.72 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 165.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 184.33 ms. Allocated memory is still 202.4 MB. Free memory was 165.1 MB in the beginning and 154.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: 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, overapproximation of to_int at line 20. Possible FailurePath: [L18] int A, R; [L19] int u, v, r; [L20] A = __VERIFIER_nondet_double() [L21] R = __VERIFIER_nondet_double() [L22] CALL assume_abort_if_not((R - 1) * (R - 1) < A) [L7] COND TRUE !cond [L22] RET assume_abort_if_not((R - 1) * (R - 1) < A) [L24] CALL assume_abort_if_not(A % 2 == 1) [L7] COND TRUE !cond [L24] RET assume_abort_if_not(A % 2 == 1) [L26] u = 2 * R + 1 [L27] v = 1 [L28] r = R * R - A [L53] CALL __VERIFIER_assert(4*A == u*u - v*v - 2*u + 2*v) [L10] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.1s, 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=33occurred 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...