/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=SHALLOWEST --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/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 02:00:09,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 02:00:09,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 02:00:09,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 02:00:09,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 02:00:09,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 02:00:09,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 02:00:09,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 02:00:09,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 02:00:09,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 02:00:09,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 02:00:09,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 02:00:09,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 02:00:09,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 02:00:09,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 02:00:09,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 02:00:09,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 02:00:09,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 02:00:09,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 02:00:09,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 02:00:09,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 02:00:09,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 02:00:09,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 02:00:09,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 02:00:09,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 02:00:09,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 02:00:09,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 02:00:09,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 02:00:09,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 02:00:09,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 02:00:09,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 02:00:09,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 02:00:09,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 02:00:09,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 02:00:09,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 02:00:09,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 02:00:09,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 02:00:09,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 02:00:09,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 02:00:09,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 02:00:09,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 02:00:09,522 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 02:00:09,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 02:00:09,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 02:00:09,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 02:00:09,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 02:00:09,583 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 02:00:09,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 02:00:09,583 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 02:00:09,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 02:00:09,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 02:00:09,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 02:00:09,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 02:00:09,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 02:00:09,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 02:00:09,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 02:00:09,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 02:00:09,587 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 02:00:09,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 02:00:09,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 02:00:09,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 02:00:09,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 02:00:09,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 02:00:09,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 02:00:09,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 02:00:09,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 02:00:09,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 02:00:09,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 02:00:09,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 02:00:09,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 02:00:09,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 02:00:09,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 02:00:10,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 02:00:10,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 02:00:10,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 02:00:10,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 02:00:10,078 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 02:00:10,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-10-27 02:00:10,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25aea1bfc/2aaca5df54f1446391b1bb4e5ebfa906/FLAG568887643 [2020-10-27 02:00:10,701 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 02:00:10,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-10-27 02:00:10,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25aea1bfc/2aaca5df54f1446391b1bb4e5ebfa906/FLAG568887643 [2020-10-27 02:00:11,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25aea1bfc/2aaca5df54f1446391b1bb4e5ebfa906 [2020-10-27 02:00:11,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 02:00:11,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 02:00:11,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 02:00:11,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 02:00:11,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 02:00:11,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606cba56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11, skipping insertion in model container [2020-10-27 02:00:11,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 02:00:11,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 02:00:11,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 02:00:11,319 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 02:00:11,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 02:00:11,359 INFO L208 MainTranslator]: Completed translation [2020-10-27 02:00:11,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11 WrapperNode [2020-10-27 02:00:11,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 02:00:11,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 02:00:11,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 02:00:11,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 02:00:11,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (1/1) ... [2020-10-27 02:00:11,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 02:00:11,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 02:00:11,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 02:00:11,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 02:00:11,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (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 02:00:11,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 02:00:11,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 02:00:11,562 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 02:00:11,562 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 02:00:11,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 02:00:11,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 02:00:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 02:00:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 02:00:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 02:00:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 02:00:11,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-27 02:00:11,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 02:00:11,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 02:00:11,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 02:00:11,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 02:00:11,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 02:00:11,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 02:00:11,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 02:00:11,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 02:00:11,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 02:00:12,125 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 02:00:12,125 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 02:00:12,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:00:12 BoogieIcfgContainer [2020-10-27 02:00:12,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 02:00:12,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 02:00:12,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 02:00:12,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 02:00:12,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:00:11" (1/3) ... [2020-10-27 02:00:12,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c92c210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:00:12, skipping insertion in model container [2020-10-27 02:00:12,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11" (2/3) ... [2020-10-27 02:00:12,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c92c210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:00:12, skipping insertion in model container [2020-10-27 02:00:12,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:00:12" (3/3) ... [2020-10-27 02:00:12,138 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-10-27 02:00:12,152 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 02:00:12,158 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 02:00:12,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 02:00:12,204 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 02:00:12,204 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 02:00:12,204 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 02:00:12,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 02:00:12,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 02:00:12,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 02:00:12,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 02:00:12,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 02:00:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-27 02:00:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 02:00:12,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:12,239 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 02:00:12,239 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:12,253 INFO L82 PathProgramCache]: Analyzing trace with hash 451539001, now seen corresponding path program 1 times [2020-10-27 02:00:12,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:12,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928176298] [2020-10-27 02:00:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:12,437 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-27 02:00:12,438 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-27 02:00:12,438 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 02:00:12,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 02:00:12,463 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-27 02:00:12,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:00:12 BoogieIcfgContainer [2020-10-27 02:00:12,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 02:00:12,468 INFO L168 Benchmark]: Toolchain (without parser) took 1391.93 ms. Allocated memory is still 157.3 MB. Free memory was 111.1 MB in the beginning and 115.3 MB in the end (delta: -4.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 02:00:12,470 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 157.3 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 02:00:12,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.46 ms. Allocated memory is still 157.3 MB. Free memory was 110.5 MB in the beginning and 100.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,477 INFO L168 Benchmark]: Boogie Preprocessor took 102.28 ms. Allocated memory is still 157.3 MB. Free memory was 100.5 MB in the beginning and 140.8 MB in the end (delta: -40.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,479 INFO L168 Benchmark]: RCFGBuilder took 663.36 ms. Allocated memory is still 157.3 MB. Free memory was 140.8 MB in the beginning and 126.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,480 INFO L168 Benchmark]: TraceAbstraction took 334.85 ms. Allocated memory is still 157.3 MB. Free memory was 126.1 MB in the beginning and 115.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 157.3 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.46 ms. Allocated memory is still 157.3 MB. Free memory was 110.5 MB in the beginning and 100.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 102.28 ms. Allocated memory is still 157.3 MB. Free memory was 100.5 MB in the beginning and 140.8 MB in the end (delta: -40.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 663.36 ms. Allocated memory is still 157.3 MB. Free memory was 140.8 MB in the beginning and 126.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 334.85 ms. Allocated memory is still 157.3 MB. Free memory was 126.1 MB in the beginning and 115.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: 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 22. Possible FailurePath: [L20] int A, R; [L21] int u, v, r; [L22] A = __VERIFIER_nondet_double() [L23] R = __VERIFIER_nondet_double() [L25] CALL assume_abort_if_not((R - 1) * (R - 1) < A) [L9] COND TRUE !cond [L25] RET assume_abort_if_not((R - 1) * (R - 1) < A) [L27] CALL assume_abort_if_not(A % 2 == 1) [L9] COND TRUE !cond [L27] RET assume_abort_if_not(A % 2 == 1) [L29] u = 2 * R + 1 [L30] v = 1 [L31] r = R * R - A [L47] CALL __VERIFIER_assert(4*A == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] CALL reach_error() [L5] __assert_fail("0", "fermat2.c", 5, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.2s, 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=32occurred 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...