/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:17:45,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:17:45,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:17:45,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:17:45,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:17:45,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:17:45,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:17:45,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:17:45,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:17:45,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:17:45,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:17:45,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:17:45,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:17:45,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:17:45,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:17:45,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:17:45,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:17:45,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:17:45,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:17:45,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:17:45,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:17:45,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:17:45,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:17:45,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:17:45,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:17:45,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:17:45,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:17:45,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:17:45,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:17:45,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:17:45,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:17:45,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:17:45,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:17:45,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:17:45,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:17:45,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:17:45,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:17:45,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:17:45,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:17:45,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:17:45,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:17:45,372 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 19:17:45,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:17:45,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:17:45,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:17:45,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:17:45,418 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:17:45,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:17:45,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:17:45,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:17:45,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:17:45,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:17:45,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:17:45,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:17:45,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:17:45,421 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:17:45,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:17:45,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:17:45,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:17:45,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:17:45,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:17:45,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:17:45,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:17:45,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:17:45,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:17:45,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:17:45,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:17:45,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:17:45,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:17:45,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:17:45,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:17:45,425 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:17:45,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:17:45,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:17:45,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:17:45,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:17:45,963 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:17:45,964 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-09-24 19:17:46,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b7a465f/e32d0755fb934bd5bf0d19d0fa705f0c/FLAG15a2fec6e [2020-09-24 19:17:46,578 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:17:46,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-09-24 19:17:46,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b7a465f/e32d0755fb934bd5bf0d19d0fa705f0c/FLAG15a2fec6e [2020-09-24 19:17:46,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b7a465f/e32d0755fb934bd5bf0d19d0fa705f0c [2020-09-24 19:17:46,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:17:46,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:17:46,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:17:46,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:17:46,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:17:46,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:17:46" (1/1) ... [2020-09-24 19:17:46,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1afd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:46, skipping insertion in model container [2020-09-24 19:17:46,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:17:46" (1/1) ... [2020-09-24 19:17:46,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:17:46,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:17:47,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:17:47,224 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:17:47,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:17:47,263 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:17:47,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47 WrapperNode [2020-09-24 19:17:47,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:17:47,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:17:47,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:17:47,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:17:47,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (1/1) ... [2020-09-24 19:17:47,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (1/1) ... [2020-09-24 19:17:47,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (1/1) ... [2020-09-24 19:17:47,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (1/1) ... [2020-09-24 19:17:47,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (1/1) ... [2020-09-24 19:17:47,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (1/1) ... [2020-09-24 19:17:47,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (1/1) ... [2020-09-24 19:17:47,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:17:47,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:17:47,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:17:47,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:17:47,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (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 19:17:47,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:17:47,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:17:47,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:17:47,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:17:47,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:17:47,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-24 19:17:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:17:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:17:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:17:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:17:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:17:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:17:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:17:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:17:47,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:17:47,697 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:17:47,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:17:47 BoogieIcfgContainer [2020-09-24 19:17:47,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:17:47,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:17:47,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:17:47,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:17:47,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:17:46" (1/3) ... [2020-09-24 19:17:47,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1769b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:17:47, skipping insertion in model container [2020-09-24 19:17:47,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:17:47" (2/3) ... [2020-09-24 19:17:47,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1769b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:17:47, skipping insertion in model container [2020-09-24 19:17:47,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:17:47" (3/3) ... [2020-09-24 19:17:47,739 INFO L109 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-09-24 19:17:47,754 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:17:47,764 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:17:47,791 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:17:47,823 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:17:47,823 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:17:47,823 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:17:47,824 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:17:47,824 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:17:47,824 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:17:47,824 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:17:47,824 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:17:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-24 19:17:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 19:17:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:17:47,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:17:47,859 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:17:47,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:17:47,867 INFO L82 PathProgramCache]: Analyzing trace with hash -273447452, now seen corresponding path program 1 times [2020-09-24 19:17:47,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:17:47,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052953742] [2020-09-24 19:17:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:17:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:48,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:48,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:17:48,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-24 19:17:48,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:48,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:17:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:17:48,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:17:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:17:48,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:17:48,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:17:48,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:17:48,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:17:48,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 19:17:48,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:17:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:17:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:17:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:17:48,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:17:48,173 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 19:17:48,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052953742] [2020-09-24 19:17:48,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:17:48,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 19:17:48,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400302891] [2020-09-24 19:17:48,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 19:17:48,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:17:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 19:17:48,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 19:17:48,207 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-09-24 19:17:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:17:48,233 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-24 19:17:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 19:17:48,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-24 19:17:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:17:48,243 INFO L225 Difference]: With dead ends: 45 [2020-09-24 19:17:48,243 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 19:17:48,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 19:17:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 19:17:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-24 19:17:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 19:17:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-24 19:17:48,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 16 [2020-09-24 19:17:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:17:48,298 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-24 19:17:48,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 19:17:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-24 19:17:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 19:17:48,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:17:48,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 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 19:17:48,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:17:48,300 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:17:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:17:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash 112425219, now seen corresponding path program 1 times [2020-09-24 19:17:48,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:17:48,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038517695] [2020-09-24 19:17:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:17:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:17:48,326 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:17:48,326 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:17:48,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:17:48,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:17:48 BoogieIcfgContainer [2020-09-24 19:17:48,352 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:17:48,356 INFO L168 Benchmark]: Toolchain (without parser) took 1415.52 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.2 MB in the beginning and 141.8 MB in the end (delta: -39.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-09-24 19:17:48,357 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:17:48,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.20 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 91.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:17:48,359 INFO L168 Benchmark]: Boogie Preprocessor took 120.35 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 181.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-24 19:17:48,360 INFO L168 Benchmark]: RCFGBuilder took 317.69 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:17:48,361 INFO L168 Benchmark]: TraceAbstraction took 635.47 ms. Allocated memory is still 202.4 MB. Free memory was 166.4 MB in the beginning and 141.8 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:17:48,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.20 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 91.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.35 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 181.0 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.69 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 635.47 ms. Allocated memory is still 202.4 MB. Free memory was 166.4 MB in the beginning and 141.8 MB in the end (delta: 24.6 MB). Peak memory consumption was 24.6 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: overapproximation of someBinaryFLOATComparisonOperation at line 35, overapproximation of someBinaryArithmeticFLOAToperation at line 28. Possible FailurePath: [L18] float x = __VERIFIER_nondet_float() ; [L19] float exp = 1.0 ; [L20] float term = 1.0 ; [L21] unsigned int count = 1 ; [L22] float result = 2*(1/(1-x)) ; [L23] int temp ; [L25] COND TRUE 1 [L27] term = term * (x/count) [L28] exp = exp + term [L29] count++ [L31] temp = __VERIFIER_nondet_int() [L32] COND TRUE temp ==0 [L35] CALL __VERIFIER_assert( result >= exp ) [L12] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 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...