/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/freire1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 02:00:09,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 02:00:09,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 02:00:09,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 02:00:09,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 02:00:09,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 02:00:09,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 02:00:09,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 02:00:09,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 02:00:09,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 02:00:09,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 02:00:09,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 02:00:09,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 02:00:09,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 02:00:09,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 02:00:09,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 02:00:09,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 02:00:09,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 02:00:09,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 02:00:09,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 02:00:09,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 02:00:09,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 02:00:09,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 02:00:09,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 02:00:09,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 02:00:09,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 02:00:09,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 02:00:09,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 02:00:09,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 02:00:09,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 02:00:09,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 02:00:09,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 02:00:09,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 02:00:09,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 02:00:09,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 02:00:09,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 02:00:09,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 02:00:09,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 02:00:09,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 02:00:09,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 02:00:09,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 02:00:09,412 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 02:00:09,448 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 02:00:09,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 02:00:09,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 02:00:09,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 02:00:09,453 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 02:00:09,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 02:00:09,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 02:00:09,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 02:00:09,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 02:00:09,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 02:00:09,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 02:00:09,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 02:00:09,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 02:00:09,457 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 02:00:09,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 02:00:09,458 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 02:00:09,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 02:00:09,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 02:00:09,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 02:00:09,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 02:00:09,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 02:00:09,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 02:00:09,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 02:00:09,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 02:00:09,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 02:00:09,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 02:00:09,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 02:00:09,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 02:00:09,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 02:00:09,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 02:00:09,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 02:00:09,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 02:00:09,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 02:00:09,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 02:00:09,899 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 02:00:09,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/freire1.c [2020-10-27 02:00:09,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7011ba178/7eb900fdec834ffaa0c6931205219af7/FLAG1cb4d4942 [2020-10-27 02:00:10,551 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 02:00:10,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/freire1.c [2020-10-27 02:00:10,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7011ba178/7eb900fdec834ffaa0c6931205219af7/FLAG1cb4d4942 [2020-10-27 02:00:10,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7011ba178/7eb900fdec834ffaa0c6931205219af7 [2020-10-27 02:00:10,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 02:00:10,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 02:00:10,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 02:00:10,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 02:00:10,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 02:00:10,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:00:10" (1/1) ... [2020-10-27 02:00:10,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34350f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:10, skipping insertion in model container [2020-10-27 02:00:10,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:00:10" (1/1) ... [2020-10-27 02:00:10,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 02:00:10,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 02:00:11,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 02:00:11,254 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 02:00:11,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 02:00:11,288 INFO L208 MainTranslator]: Completed translation [2020-10-27 02:00:11,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:00:11 WrapperNode [2020-10-27 02:00:11,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 02:00:11,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 02:00:11,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 02:00:11,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 02:00:11,303 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 02:00:11,303 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 02:00:11,312 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 02:00:11,312 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 02:00:11,332 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 02:00:11,336 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 02:00:11,337 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 02:00:11,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 02:00:11,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 02:00:11,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 02:00:11,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 02:00:11,345 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 02:00:11,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 02:00:11,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 02:00:11,439 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 02:00:11,439 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 02:00:11,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 02:00:11,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 02:00:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 02:00:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 02:00:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 02:00:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 02:00:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-27 02:00:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 02:00:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 02:00:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 02:00:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 02:00:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 02:00:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 02:00:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 02:00:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 02:00:11,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 02:00:11,695 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 02:00:11,695 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 02:00:11,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:00:11 BoogieIcfgContainer [2020-10-27 02:00:11,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 02:00:11,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 02:00:11,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 02:00:11,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 02:00:11,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:00:10" (1/3) ... [2020-10-27 02:00:11,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659abac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:00:11, skipping insertion in model container [2020-10-27 02:00:11,704 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 02:00:11,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659abac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:00:11, skipping insertion in model container [2020-10-27 02:00:11,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:00:11" (3/3) ... [2020-10-27 02:00:11,706 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2020-10-27 02:00:11,720 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 02:00:11,724 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 02:00:11,752 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 02:00:11,801 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 02:00:11,801 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 02:00:11,801 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 02:00:11,802 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 02:00:11,802 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 02:00:11,802 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 02:00:11,802 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 02:00:11,802 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 02:00:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 02:00:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 02:00:11,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:11,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:11,835 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash 619537921, now seen corresponding path program 1 times [2020-10-27 02:00:11,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:11,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449628514] [2020-10-27 02:00:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:12,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:12,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:12,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 02:00:12,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:12,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 02:00:12,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:12,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 02:00:12,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:12,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 02:00:12,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:12,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:12,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:12,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:12,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 02:00:12,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:12,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:12,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:12,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:12,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 02:00:12,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449628514] [2020-10-27 02:00:12,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 02:00:12,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 02:00:12,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996362] [2020-10-27 02:00:12,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 02:00:12,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:12,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 02:00:12,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 02:00:12,272 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 02:00:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:12,360 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-27 02:00:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 02:00:12,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 02:00:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:12,370 INFO L225 Difference]: With dead ends: 40 [2020-10-27 02:00:12,371 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 02:00:12,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 02:00:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 02:00:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 02:00:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 02:00:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 02:00:12,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-10-27 02:00:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:12,418 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 02:00:12,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 02:00:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 02:00:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 02:00:12,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:12,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:12,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 02:00:12,420 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash 674949181, now seen corresponding path program 1 times [2020-10-27 02:00:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:12,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142722110] [2020-10-27 02:00:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 02:00:12,449 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 02:00:12,449 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 02:00:12,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 02:00:12,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:00:12 BoogieIcfgContainer [2020-10-27 02:00:12,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 02:00:12,481 INFO L168 Benchmark]: Toolchain (without parser) took 1527.64 ms. Allocated memory is still 151.0 MB. Free memory was 106.4 MB in the beginning and 86.0 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.7 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,482 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 02:00:12,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.38 ms. Allocated memory is still 151.0 MB. Free memory was 106.0 MB in the beginning and 132.0 MB in the end (delta: -26.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,485 INFO L168 Benchmark]: Boogie Preprocessor took 49.67 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 133.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,486 INFO L168 Benchmark]: RCFGBuilder took 353.78 ms. Allocated memory is still 151.0 MB. Free memory was 133.7 MB in the beginning and 121.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,487 INFO L168 Benchmark]: TraceAbstraction took 777.63 ms. Allocated memory is still 151.0 MB. Free memory was 121.2 MB in the beginning and 86.0 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2020-10-27 02:00:12,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 329.38 ms. Allocated memory is still 151.0 MB. Free memory was 106.0 MB in the beginning and 132.0 MB in the end (delta: -26.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.67 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 133.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 353.78 ms. Allocated memory is still 151.0 MB. Free memory was 133.7 MB in the beginning and 121.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 777.63 ms. Allocated memory is still 151.0 MB. Free memory was 121.2 MB in the beginning and 86.0 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_int at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 [L31] COND TRUE 1 [L32] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) [L17] COND TRUE !(cond) [L19] CALL reach_error() [L10] __assert_fail("0", "freire1.c", 10, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 11 SDslu, 3 SDs, 0 SdLazy, 5 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 451 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...