/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:42:50,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:42:50,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:42:50,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:42:50,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:42:50,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:42:50,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:42:50,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:42:50,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:42:50,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:42:50,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:42:50,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:42:50,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:42:50,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:42:50,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:42:50,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:42:50,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:42:50,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:42:50,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:42:50,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:42:51,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:42:51,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:42:51,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:42:51,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:42:51,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:42:51,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:42:51,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:42:51,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:42:51,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:42:51,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:42:51,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:42:51,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:42:51,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:42:51,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:42:51,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:42:51,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:42:51,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:42:51,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:42:51,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:42:51,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:42:51,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:42:51,026 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 [2020-09-25 07:42:51,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:42:51,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:42:51,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:42:51,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:42:51,084 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:42:51,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:42:51,085 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:42:51,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:42:51,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:42:51,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:42:51,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:42:51,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:42:51,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:42:51,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:42:51,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:42:51,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:42:51,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:42:51,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:42:51,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:42:51,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:42:51,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:42:51,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:42:51,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:42:51,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:42:51,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:42:51,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:42:51,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:42:51,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:42:51,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:42:51,091 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:42:51,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:42:51,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:42:51,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:42:51,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:42:51,619 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:42:51,621 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-09-25 07:42:51,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab0756a6f/e43861a879d74f78bc5e1c4ea9629c7a/FLAGf1e7685c0 [2020-09-25 07:42:52,271 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:42:52,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-09-25 07:42:52,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab0756a6f/e43861a879d74f78bc5e1c4ea9629c7a/FLAGf1e7685c0 [2020-09-25 07:42:52,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ab0756a6f/e43861a879d74f78bc5e1c4ea9629c7a [2020-09-25 07:42:52,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:42:52,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:42:52,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:42:52,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:42:52,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:42:52,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:42:52" (1/1) ... [2020-09-25 07:42:52,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87e4b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:52, skipping insertion in model container [2020-09-25 07:42:52,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:42:52" (1/1) ... [2020-09-25 07:42:52,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:42:52,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:42:52,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:42:52,904 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:42:52,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:42:53,048 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:42:53,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53 WrapperNode [2020-09-25 07:42:53,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:42:53,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:42:53,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:42:53,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:42:53,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (1/1) ... [2020-09-25 07:42:53,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (1/1) ... [2020-09-25 07:42:53,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (1/1) ... [2020-09-25 07:42:53,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (1/1) ... [2020-09-25 07:42:53,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (1/1) ... [2020-09-25 07:42:53,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (1/1) ... [2020-09-25 07:42:53,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (1/1) ... [2020-09-25 07:42:53,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:42:53,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:42:53,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:42:53,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:42:53,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (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 [2020-09-25 07:42:53,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:42:53,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:42:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-09-25 07:42:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2020-09-25 07:42:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-25 07:42:53,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:42:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:42:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 07:42:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-09-25 07:42:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 07:42:53,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 07:42:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 07:42:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 07:42:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2020-09-25 07:42:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-25 07:42:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:42:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:42:53,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:42:53,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 07:42:53,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 07:42:53,629 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:42:53,629 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 07:42:53,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:42:53 BoogieIcfgContainer [2020-09-25 07:42:53,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:42:53,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:42:53,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:42:53,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:42:53,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:42:52" (1/3) ... [2020-09-25 07:42:53,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bc1430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:42:53, skipping insertion in model container [2020-09-25 07:42:53,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:42:53" (2/3) ... [2020-09-25 07:42:53,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38bc1430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:42:53, skipping insertion in model container [2020-09-25 07:42:53,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:42:53" (3/3) ... [2020-09-25 07:42:53,646 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-09-25 07:42:53,656 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:42:53,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:42:53,688 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:42:53,717 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:42:53,717 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:42:53,717 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:42:53,717 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:42:53,717 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:42:53,717 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:42:53,718 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:42:53,718 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:42:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-09-25 07:42:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 07:42:53,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:42:53,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:42:53,753 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:42:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:42:53,761 INFO L82 PathProgramCache]: Analyzing trace with hash -380814032, now seen corresponding path program 1 times [2020-09-25 07:42:53,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:42:53,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895935927] [2020-09-25 07:42:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:42:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:53,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:54,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:54,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:54,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 07:42:54,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:42:54,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-09-25 07:42:54,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:54,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:54,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:42:54,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 07:42:54,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:42:54,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 07:42:54,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:42:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:54,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:54,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:42:54,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:54,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:42:54,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:54,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:54,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:42:54,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:42:54,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:42:54,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 07:42:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:54,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:54,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:54,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:54,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 07:42:54,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:42:54,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 07:42:54,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:54,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:54,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:42:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 07:42:54,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:42:54,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:54,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 07:42:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:54,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:54,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:54,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 07:42:54,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:54,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 07:42:54,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:54,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:54,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:42:54,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-09-25 07:42:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:42:54,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:42:54,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895935927] [2020-09-25 07:42:54,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:42:54,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:42:54,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259559297] [2020-09-25 07:42:54,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:42:54,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:42:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:42:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:42:54,585 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-09-25 07:42:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:42:54,886 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-09-25 07:42:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 07:42:54,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-25 07:42:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:42:54,903 INFO L225 Difference]: With dead ends: 164 [2020-09-25 07:42:54,903 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 07:42:54,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:42:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 07:42:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-09-25 07:42:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 07:42:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-09-25 07:42:54,974 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 34 [2020-09-25 07:42:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:42:54,974 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-09-25 07:42:54,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:42:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-09-25 07:42:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 07:42:54,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:42:54,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:42:54,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:42:54,979 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:42:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:42:54,980 INFO L82 PathProgramCache]: Analyzing trace with hash 133434162, now seen corresponding path program 1 times [2020-09-25 07:42:54,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:42:54,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561192625] [2020-09-25 07:42:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:42:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:55,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:55,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:55,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 07:42:55,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:55,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-09-25 07:42:55,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:55,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:55,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:42:55,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-25 07:42:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 07:42:55,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:55,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:42:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:55,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:55,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:42:55,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:55,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 07:42:55,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:55,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:42:55,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:42:55,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:42:55,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:55,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 07:42:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:55,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:55,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:55,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 07:42:55,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:55,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-25 07:42:55,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:55,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:42:55,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 07:42:55,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 07:42:55,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:55,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 07:42:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:55,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:55,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:55,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 07:42:55,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:55,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-25 07:42:55,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:55,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:42:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:42:55,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 07:42:55,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:42:55,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561192625] [2020-09-25 07:42:55,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:42:55,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 07:42:55,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632132937] [2020-09-25 07:42:55,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 07:42:55,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:42:55,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 07:42:55,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:42:55,598 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 6 states. [2020-09-25 07:42:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:42:55,864 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-09-25 07:42:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:42:55,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-09-25 07:42:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:42:55,869 INFO L225 Difference]: With dead ends: 117 [2020-09-25 07:42:55,870 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 07:42:55,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:42:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 07:42:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-25 07:42:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 07:42:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 07:42:55,888 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 43 [2020-09-25 07:42:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:42:55,888 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 07:42:55,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 07:42:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 07:42:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 07:42:55,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:42:55,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:42:55,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:42:55,891 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:42:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:42:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash 619089939, now seen corresponding path program 1 times [2020-09-25 07:42:55,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:42:55,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649820973] [2020-09-25 07:42:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:42:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:55,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:56,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:56,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 07:42:56,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:56,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-25 07:42:56,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:56,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:42:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 07:42:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 07:42:56,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:56,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:42:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:56,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:56,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:56,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:42:56,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:56,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:42:56,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:56,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:56,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:42:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:42:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:42:56,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:56,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 07:42:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:56,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:56,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 07:42:56,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:56,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-25 07:42:56,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:56,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:42:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 07:42:56,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 07:42:56,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:56,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 07:42:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:42:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:42:56,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:42:56,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 07:42:56,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:42:56,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 07:42:56,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:42:56,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:42:56,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:42:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:42:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 07:42:56,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:42:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:42:56,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649820973] [2020-09-25 07:42:56,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:42:56,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 07:42:56,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714077642] [2020-09-25 07:42:56,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 07:42:56,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:42:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 07:42:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:42:56,315 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-09-25 07:42:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:42:56,512 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-09-25 07:42:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 07:42:56,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-09-25 07:42:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:42:56,515 INFO L225 Difference]: With dead ends: 121 [2020-09-25 07:42:56,515 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 07:42:56,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:42:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 07:42:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-09-25 07:42:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 07:42:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-09-25 07:42:56,527 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 46 [2020-09-25 07:42:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:42:56,527 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-09-25 07:42:56,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 07:42:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-09-25 07:42:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 07:42:56,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:42:56,529 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:42:56,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:42:56,530 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:42:56,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:42:56,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1331564627, now seen corresponding path program 1 times [2020-09-25 07:42:56,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:42:56,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028358099] [2020-09-25 07:42:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:42:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 07:42:56,548 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 07:42:56,548 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 07:42:56,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:42:56,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 07:42:56 BoogieIcfgContainer [2020-09-25 07:42:56,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 07:42:56,582 INFO L168 Benchmark]: Toolchain (without parser) took 3972.68 ms. Allocated memory was 141.6 MB in the beginning and 244.3 MB in the end (delta: 102.8 MB). Free memory was 104.4 MB in the beginning and 174.9 MB in the end (delta: -70.5 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. [2020-09-25 07:42:56,583 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 07:42:56,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 435.61 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 103.8 MB in the beginning and 182.8 MB in the end (delta: -79.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-09-25 07:42:56,585 INFO L168 Benchmark]: Boogie Preprocessor took 58.12 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-25 07:42:56,586 INFO L168 Benchmark]: RCFGBuilder took 527.97 ms. Allocated memory is still 203.9 MB. Free memory was 180.5 MB in the beginning and 156.8 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-09-25 07:42:56,587 INFO L168 Benchmark]: TraceAbstraction took 2941.30 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 156.1 MB in the beginning and 174.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-09-25 07:42:56,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 435.61 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 103.8 MB in the beginning and 182.8 MB in the end (delta: -79.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.12 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 527.97 ms. Allocated memory is still 203.9 MB. Free memory was 180.5 MB in the beginning and 156.8 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2941.30 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 156.1 MB in the beginning and 174.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 69, overapproximation of someUnaryFLOAToperation at line 64. Possible FailurePath: [L64] float x = -0.0f; [L65] float y = 0.0f; [L66] CALL, EXPR fmin_float(x, y) [L36] CALL, EXPR __fpclassify_float(x) [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; [L36] RET, EXPR __fpclassify_float(x) [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; [L66] RET, EXPR fmin_float(x, y) [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 89 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 267 SDtfs, 53 SDslu, 494 SDs, 0 SdLazy, 352 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred 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, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 9534 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...