/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 --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 interpolation-heuristic=FIRST --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_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:19:08,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:19:08,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:19:08,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:19:08,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:19:08,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:19:08,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:19:08,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:19:08,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:19:08,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:19:08,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:19:08,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:19:08,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:19:08,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:19:08,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:19:08,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:19:08,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:19:08,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:19:08,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:19:08,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:19:08,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:19:08,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:19:08,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:19:08,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:19:08,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:19:08,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:19:08,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:19:08,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:19:08,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:19:08,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:19:08,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:19:08,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:19:08,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:19:08,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:19:08,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:19:08,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:19:08,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:19:08,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:19:08,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:19:08,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:19:08,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:19:08,973 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 [2020-09-21 11:19:08,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:19:08,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:19:09,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:19:09,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:19:09,001 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:19:09,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:19:09,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:19:09,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:19:09,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:19:09,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:19:09,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:19:09,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:19:09,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:19:09,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:19:09,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:19:09,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:19:09,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:19:09,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:19:09,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:19:09,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:19:09,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:19:09,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:19:09,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:19:09,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:19:09,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:19:09,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:19:09,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:19:09,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:19:09,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:19:09,007 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:19:09,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:19:09,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:19:09,572 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:19:09,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:19:09,576 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:19:09,578 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-09-21 11:19:09,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c64939cd1/45c8206ad3114b92848575961ced7d06/FLAG5ce4efef5 [2020-09-21 11:19:10,201 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:19:10,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-09-21 11:19:10,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c64939cd1/45c8206ad3114b92848575961ced7d06/FLAG5ce4efef5 [2020-09-21 11:19:10,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c64939cd1/45c8206ad3114b92848575961ced7d06 [2020-09-21 11:19:10,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:19:10,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:19:10,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:19:10,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:19:10,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:19:10,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:10,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693e2903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10, skipping insertion in model container [2020-09-21 11:19:10,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:10,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:19:10,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:19:10,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:19:10,863 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:19:10,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:19:10,921 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:19:10,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10 WrapperNode [2020-09-21 11:19:10,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:19:10,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:19:10,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:19:10,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:19:11,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:11,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:11,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:11,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:11,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:11,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:11,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (1/1) ... [2020-09-21 11:19:11,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:19:11,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:19:11,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:19:11,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:19:11,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (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 [2020-09-21 11:19:11,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:19:11,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:19:11,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-09-21 11:19:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-09-21 11:19:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-21 11:19:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:19:11,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:19:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-09-21 11:19:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:19:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-21 11:19:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:19:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:19:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-09-21 11:19:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-21 11:19:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:19:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:19:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:19:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-21 11:19:11,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:19:11,596 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:19:11,596 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 11:19:11,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:11 BoogieIcfgContainer [2020-09-21 11:19:11,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:19:11,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:19:11,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:19:11,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:19:11,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:19:10" (1/3) ... [2020-09-21 11:19:11,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce57bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:11, skipping insertion in model container [2020-09-21 11:19:11,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:19:10" (2/3) ... [2020-09-21 11:19:11,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce57bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:19:11, skipping insertion in model container [2020-09-21 11:19:11,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:19:11" (3/3) ... [2020-09-21 11:19:11,611 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-09-21 11:19:11,622 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:19:11,633 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:19:11,655 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:19:11,685 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:19:11,685 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:19:11,686 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:19:11,686 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:19:11,686 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:19:11,686 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:19:11,686 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:19:11,686 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:19:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-21 11:19:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:19:11,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:11,718 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] [2020-09-21 11:19:11,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1078913502, now seen corresponding path program 1 times [2020-09-21 11:19:11,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:11,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003462888] [2020-09-21 11:19:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:11,905 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:11,905 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:11,906 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:11,906 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:11,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:19:11,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:11,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:19:11,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:11,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:11,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:19:11,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:11,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:11,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:11,985 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:11,986 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:11,986 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:11,986 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:11,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:19:11,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:11,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:11,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:11,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:11,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:12,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:19:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:12,034 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:12,034 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:12,035 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:12,035 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:12,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:19:12,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:12,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:12,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 11:19:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:12,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 11:19:12,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:19:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:12,057 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:12,057 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:12,058 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:12,058 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:12,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:19:12,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:12,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:19:12,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:19:12,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:12,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:12,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003462888] [2020-09-21 11:19:12,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:12,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:19:12,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359344452] [2020-09-21 11:19:12,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:19:12,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:19:12,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:19:12,117 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-21 11:19:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:12,360 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-09-21 11:19:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:19:12,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-21 11:19:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:12,376 INFO L225 Difference]: With dead ends: 79 [2020-09-21 11:19:12,376 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:19:12,381 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 [2020-09-21 11:19:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:19:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 11:19:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:19:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-09-21 11:19:12,443 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2020-09-21 11:19:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:12,443 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-09-21 11:19:12,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:19:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-09-21 11:19:12,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:19:12,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:12,446 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] [2020-09-21 11:19:12,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:19:12,447 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:12,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1357269066, now seen corresponding path program 1 times [2020-09-21 11:19:12,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:12,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793970209] [2020-09-21 11:19:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:12,503 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:12,503 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:12,504 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:12,504 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:12,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:19:12,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:12,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:19:12,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:12,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:12,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:19:12,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:12,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:12,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:12,567 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:12,568 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:12,568 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:12,568 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:12,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:19:12,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:12,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:19:12,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:12,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:12,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:12,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:12,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:19:12,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:19:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:12,630 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:12,630 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:12,631 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:12,631 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:12,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:19:12,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:12,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:19:12,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:12,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:12,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-21 11:19:12,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:12,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:12,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:19:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:12,692 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:12,693 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:12,693 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:12,693 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:12,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 11:19:12,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:12,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:19:12,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:12,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:12,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:12,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:19:12,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:19:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:12,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793970209] [2020-09-21 11:19:12,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:12,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:19:12,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239498295] [2020-09-21 11:19:12,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:19:12,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:12,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:19:12,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:19:12,753 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-09-21 11:19:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:13,091 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-09-21 11:19:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:19:13,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-21 11:19:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:13,099 INFO L225 Difference]: With dead ends: 59 [2020-09-21 11:19:13,099 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:19:13,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:19:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:19:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-21 11:19:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:19:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:19:13,131 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2020-09-21 11:19:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:13,132 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:19:13,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:19:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:19:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:19:13,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:13,137 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] [2020-09-21 11:19:13,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:19:13,137 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1777326817, now seen corresponding path program 1 times [2020-09-21 11:19:13,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:13,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771995266] [2020-09-21 11:19:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,204 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,204 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,205 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,205 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:19:13,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:19:13,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:13,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 11:19:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:13,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,237 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,237 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,237 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,238 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:19:13,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:13,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:13,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:13,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:13,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:19:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,278 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,278 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,279 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,279 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:19:13,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:19:13,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:13,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:19:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:13,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:13,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:19:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,319 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,320 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,320 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,321 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-21 11:19:13,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:19:13,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:19:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:13,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771995266] [2020-09-21 11:19:13,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:13,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:19:13,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906839523] [2020-09-21 11:19:13,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:19:13,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:13,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:19:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:19:13,346 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 11:19:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:13,673 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 11:19:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:19:13,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-21 11:19:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:13,677 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:19:13,677 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:19:13,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:19:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:19:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 11:19:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:19:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:19:13,694 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 24 [2020-09-21 11:19:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:13,695 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:19:13,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:19:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:19:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:19:13,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:13,697 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] [2020-09-21 11:19:13,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:19:13,697 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash -978622930, now seen corresponding path program 1 times [2020-09-21 11:19:13,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:13,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844440365] [2020-09-21 11:19:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,720 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,720 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,720 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,721 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 11:19:13,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:19:13,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:19:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:13,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:13,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,744 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,744 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,745 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,745 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:19:13,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:13,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:13,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:13,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:13,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:19:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,782 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,782 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,782 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,782 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:19:13,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:19:13,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:13,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:19:13,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:13,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:13,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:19:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:13,815 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:13,816 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:13,816 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:13,816 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:13,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 11:19:13,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:13,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:19:13,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:13,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:13,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:13,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:19:13,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:19:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:13,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844440365] [2020-09-21 11:19:13,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:13,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:19:13,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095494603] [2020-09-21 11:19:13,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:19:13,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:19:13,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:19:13,841 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 11:19:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:14,114 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 11:19:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:19:14,115 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 11:19:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:14,116 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:19:14,116 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:19:14,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:19:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:19:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 11:19:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:19:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:19:14,134 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2020-09-21 11:19:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:14,135 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:19:14,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:19:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:19:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:19:14,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:14,136 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] [2020-09-21 11:19:14,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:19:14,138 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash 888409989, now seen corresponding path program 1 times [2020-09-21 11:19:14,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:14,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729838759] [2020-09-21 11:19:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:14,157 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:14,157 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:14,158 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:14,158 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:14,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:19:14,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:14,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:19:14,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 11:19:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:14,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:14,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:19:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:14,179 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:14,179 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:14,179 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:14,179 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:14,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:19:14,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:14,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:19:14,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:19:14,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:14,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:19:14,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:14,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:19:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:14,208 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:14,208 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:14,208 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:14,209 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:14,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:19:14,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:14,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:19:14,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:14,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:14,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:19:14,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:19:14,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:14,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:19:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:19:14,239 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:19:14,240 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:19:14,240 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:19:14,240 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:19:14,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 11:19:14,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:19:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:19:14,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:19:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:19:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:19:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:19:14,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:19:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:19:14,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729838759] [2020-09-21 11:19:14,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:19:14,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:19:14,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602496254] [2020-09-21 11:19:14,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:19:14,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:19:14,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:19:14,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:19:14,262 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-09-21 11:19:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:19:14,507 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-09-21 11:19:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:19:14,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-21 11:19:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:19:14,509 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:19:14,510 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:19:14,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:19:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:19:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-09-21 11:19:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 11:19:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-09-21 11:19:14,530 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-09-21 11:19:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:19:14,530 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-09-21 11:19:14,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:19:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-09-21 11:19:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:19:14,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:19:14,531 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] [2020-09-21 11:19:14,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:19:14,533 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:19:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:19:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash -908541370, now seen corresponding path program 1 times [2020-09-21 11:19:14,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:19:14,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284809540] [2020-09-21 11:19:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:19:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:19:14,569 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:19:14,570 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:19:14,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:19:14,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:19:14 BoogieIcfgContainer [2020-09-21 11:19:14,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:19:14,610 INFO L168 Benchmark]: Toolchain (without parser) took 4098.49 ms. Allocated memory was 138.4 MB in the beginning and 249.6 MB in the end (delta: 111.1 MB). Free memory was 101.6 MB in the beginning and 160.1 MB in the end (delta: -58.5 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:14,613 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-21 11:19:14,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.64 ms. Allocated memory is still 138.4 MB. Free memory was 100.9 MB in the beginning and 90.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:14,622 INFO L168 Benchmark]: Boogie Preprocessor took 157.30 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 179.6 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:14,623 INFO L168 Benchmark]: RCFGBuilder took 520.45 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 159.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:14,623 INFO L168 Benchmark]: TraceAbstraction took 3003.53 ms. Allocated memory was 202.4 MB in the beginning and 249.6 MB in the end (delta: 47.2 MB). Free memory was 158.8 MB in the beginning and 160.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:19:14,636 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 407.64 ms. Allocated memory is still 138.4 MB. Free memory was 100.9 MB in the beginning and 90.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.30 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 179.6 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 520.45 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 159.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3003.53 ms. Allocated memory was 202.4 MB in the beginning and 249.6 MB in the end (delta: 47.2 MB). Free memory was 158.8 MB in the beginning and 160.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 72. Possible FailurePath: [L72] float x = -0.0f; [L73] float y = 0.0f; [L75] CALL, EXPR fmax_float(x, y) [L43] CALL, EXPR __fpclassify_float(x) [L20] __uint32_t w; [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (w) = gf_u.word [L28] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L30-L31] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L33-L34] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L36] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L39] return 0; [L43] RET, EXPR __fpclassify_float(x) [L43] COND TRUE __fpclassify_float(x) == 0 [L44] return y; [L75] RET, EXPR fmax_float(x, y) [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 210 SDtfs, 189 SDslu, 81 SDs, 0 SdLazy, 595 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 7202 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...