/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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:53:01,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:53:01,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:53:01,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:53:01,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:53:01,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:53:01,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:53:01,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:53:01,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:53:01,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:53:01,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:53:01,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:53:01,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:53:01,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:53:01,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:53:01,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:53:01,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:53:01,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:53:01,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:53:01,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:53:01,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:53:01,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:53:01,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:53:01,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:53:01,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:53:01,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:53:01,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:53:01,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:53:01,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:53:01,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:53:01,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:53:01,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:53:01,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:53:01,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:53:01,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:53:01,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:53:01,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:53:01,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:53:01,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:53:01,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:53:01,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:53:01,352 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 [2020-09-24 21:53:01,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:53:01,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:53:01,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:53:01,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:53:01,403 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:53:01,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:53:01,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:53:01,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:53:01,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:53:01,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:53:01,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:53:01,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:53:01,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:53:01,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:53:01,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:53:01,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:53:01,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:53:01,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:53:01,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:53:01,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:53:01,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:53:01,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:53:01,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:53:01,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:53:01,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:53:01,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:53:01,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:53:01,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:53:01,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:53:01,410 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:53:01,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:53:01,864 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:53:01,868 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:53:01,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:53:01,871 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:53:01,872 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-09-24 21:53:01,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f26bc283a/e4df4f4ace8842dc8a454e4d73b0a992/FLAG29a2e5d75 [2020-09-24 21:53:02,486 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:53:02,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-09-24 21:53:02,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f26bc283a/e4df4f4ace8842dc8a454e4d73b0a992/FLAG29a2e5d75 [2020-09-24 21:53:02,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f26bc283a/e4df4f4ace8842dc8a454e4d73b0a992 [2020-09-24 21:53:02,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:53:02,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:53:02,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:53:02,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:53:02,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:53:02,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:53:02" (1/1) ... [2020-09-24 21:53:02,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5500f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:02, skipping insertion in model container [2020-09-24 21:53:02,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:53:02" (1/1) ... [2020-09-24 21:53:02,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:53:02,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:53:03,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:53:03,107 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:53:03,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:53:03,147 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:53:03,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03 WrapperNode [2020-09-24 21:53:03,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:53:03,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:53:03,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:53:03,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:53:03,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (1/1) ... [2020-09-24 21:53:03,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (1/1) ... [2020-09-24 21:53:03,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (1/1) ... [2020-09-24 21:53:03,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (1/1) ... [2020-09-24 21:53:03,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (1/1) ... [2020-09-24 21:53:03,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (1/1) ... [2020-09-24 21:53:03,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (1/1) ... [2020-09-24 21:53:03,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:53:03,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:53:03,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:53:03,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:53:03,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (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 [2020-09-24 21:53:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:53:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:53:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:53:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:53:03,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:53:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:53:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:53:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:53:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:53:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:53:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:53:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:53:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:53:03,594 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:53:03,595 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:53:03,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:53:03 BoogieIcfgContainer [2020-09-24 21:53:03,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:53:03,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:53:03,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:53:03,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:53:03,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:53:02" (1/3) ... [2020-09-24 21:53:03,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45635de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:53:03, skipping insertion in model container [2020-09-24 21:53:03,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:53:03" (2/3) ... [2020-09-24 21:53:03,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45635de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:53:03, skipping insertion in model container [2020-09-24 21:53:03,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:53:03" (3/3) ... [2020-09-24 21:53:03,636 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-09-24 21:53:03,655 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:53:03,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:53:03,684 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:53:03,715 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:53:03,715 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:53:03,715 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:53:03,716 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:53:03,716 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:53:03,716 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:53:03,716 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:53:03,716 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:53:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-09-24 21:53:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 21:53:03,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:53:03,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:53:03,747 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:53:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:53:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash 37246768, now seen corresponding path program 1 times [2020-09-24 21:53:03,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:53:03,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894411192] [2020-09-24 21:53:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:53:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:03,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:04,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:04,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 21:53:04,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:53:04,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-09-24 21:53:04,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:53:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:53:04,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:53:04,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:53:04,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:53:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:53:04,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:53:04,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:53:04,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:53:04,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:53:04,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:53:04,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:53:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:53:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:53:04,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:53:04,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:53:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:53:04,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894411192] [2020-09-24 21:53:04,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:53:04,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 21:53:04,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998891994] [2020-09-24 21:53:04,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:53:04,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:53:04,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:53:04,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:53:04,269 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2020-09-24 21:53:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:53:04,435 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2020-09-24 21:53:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:53:04,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-24 21:53:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:53:04,449 INFO L225 Difference]: With dead ends: 74 [2020-09-24 21:53:04,449 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 21:53:04,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:53:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 21:53:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-24 21:53:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 21:53:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-09-24 21:53:04,510 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 19 [2020-09-24 21:53:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:53:04,510 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-09-24 21:53:04,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:53:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-09-24 21:53:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 21:53:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:53:04,513 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:53:04,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:53:04,514 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:53:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:53:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1680832565, now seen corresponding path program 1 times [2020-09-24 21:53:04,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:53:04,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657757309] [2020-09-24 21:53:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:53:04,538 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-24 21:53:04,538 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-24 21:53:04,538 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:53:04,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:53:04,561 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-24 21:53:04,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:53:04 BoogieIcfgContainer [2020-09-24 21:53:04,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:53:04,565 INFO L168 Benchmark]: Toolchain (without parser) took 1711.76 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 104.3 MB in the beginning and 125.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 42.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:53:04,567 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 21:53:04,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.84 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-24 21:53:04,569 INFO L168 Benchmark]: Boogie Preprocessor took 115.02 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 183.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:53:04,570 INFO L168 Benchmark]: RCFGBuilder took 337.07 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 170.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:53:04,571 INFO L168 Benchmark]: TraceAbstraction took 949.46 ms. Allocated memory is still 204.5 MB. Free memory was 169.4 MB in the beginning and 125.6 MB in the end (delta: 43.8 MB). Peak memory consumption was 43.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:53:04,575 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.84 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.02 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 183.2 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.07 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 170.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 949.46 ms. Allocated memory is still 204.5 MB. Free memory was 169.4 MB in the beginning and 125.6 MB in the end (delta: 43.8 MB). Peak memory consumption was 43.8 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. Possible FailurePath: [L19] int n, a, s, t; [L20] n = __VERIFIER_nondet_int() [L22] a = 0 [L23] s = 1 [L24] t = 1 [L26] COND TRUE 1 [L27] CALL __VERIFIER_assert(t == 2*a + 1) [L10] COND FALSE !(!(cond)) [L27] RET __VERIFIER_assert(t == 2*a + 1) [L28] CALL __VERIFIER_assert(s == (a + 1) * (a + 1)) [L10] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 17 SDslu, 112 SDs, 0 SdLazy, 25 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=1, 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 972 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...