/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=0.4 --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/double_req_bl_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:24:55,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:24:55,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:24:55,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:24:55,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:24:55,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:24:55,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:24:55,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:24:55,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:24:55,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:24:55,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:24:55,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:24:55,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:24:55,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:24:55,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:24:55,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:24:55,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:24:55,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:24:55,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:24:55,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:24:55,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:24:55,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:24:55,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:24:55,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:24:55,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:24:55,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:24:55,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:24:55,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:24:55,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:24:55,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:24:55,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:24:55,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:24:55,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:24:55,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:24:55,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:24:55,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:24:55,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:24:55,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:24:55,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:24:55,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:24:55,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:24:55,976 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 05:24:56,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:24:56,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:24:56,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:24:56,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:24:56,023 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:24:56,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:24:56,024 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:24:56,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:24:56,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:24:56,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:24:56,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:24:56,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:24:56,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:24:56,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:24:56,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:24:56,027 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:24:56,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:24:56,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:24:56,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:24:56,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:24:56,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:24:56,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:24:56,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:24:56,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:24:56,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:24:56,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:24:56,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:24:56,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:24:56,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:24:56,030 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 05:24:56,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:24:56,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:24:56,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:24:56,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:24:56,505 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:24:56,506 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-09-25 05:24:56,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54b82b82/d2c299e87a4d41f593872f6698ccad17/FLAG3e2551f19 [2020-09-25 05:24:57,188 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:24:57,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-09-25 05:24:57,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54b82b82/d2c299e87a4d41f593872f6698ccad17/FLAG3e2551f19 [2020-09-25 05:24:57,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54b82b82/d2c299e87a4d41f593872f6698ccad17 [2020-09-25 05:24:57,542 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:24:57,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:24:57,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:24:57,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:24:57,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:24:57,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:24:57" (1/1) ... [2020-09-25 05:24:57,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbfc66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:57, skipping insertion in model container [2020-09-25 05:24:57,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:24:57" (1/1) ... [2020-09-25 05:24:57,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:24:57,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:24:57,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:24:57,867 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:24:57,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:24:58,007 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:24:58,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58 WrapperNode [2020-09-25 05:24:58,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:24:58,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:24:58,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:24:58,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:24:58,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (1/1) ... [2020-09-25 05:24:58,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (1/1) ... [2020-09-25 05:24:58,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (1/1) ... [2020-09-25 05:24:58,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (1/1) ... [2020-09-25 05:24:58,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (1/1) ... [2020-09-25 05:24:58,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (1/1) ... [2020-09-25 05:24:58,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (1/1) ... [2020-09-25 05:24:58,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:24:58,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:24:58,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:24:58,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:24:58,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (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 05:24:58,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:24:58,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:24:58,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2020-09-25 05:24:58,150 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_double [2020-09-25 05:24:58,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-09-25 05:24:58,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:24:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:24:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-09-25 05:24:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2020-09-25 05:24:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 05:24:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 05:24:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 05:24:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 05:24:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_double [2020-09-25 05:24:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-09-25 05:24:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:24:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:24:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:24:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 05:24:58,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 05:24:58,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:24:58,573 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 05:24:58,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:24:58 BoogieIcfgContainer [2020-09-25 05:24:58,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:24:58,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:24:58,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:24:58,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:24:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:24:57" (1/3) ... [2020-09-25 05:24:58,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f73bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:24:58, skipping insertion in model container [2020-09-25 05:24:58,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:24:58" (2/3) ... [2020-09-25 05:24:58,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f73bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:24:58, skipping insertion in model container [2020-09-25 05:24:58,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:24:58" (3/3) ... [2020-09-25 05:24:58,592 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-09-25 05:24:58,605 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:24:58,615 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:24:58,636 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:24:58,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:24:58,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:24:58,666 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:24:58,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:24:58,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:24:58,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:24:58,666 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:24:58,666 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:24:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-09-25 05:24:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 05:24:58,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:24:58,703 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] [2020-09-25 05:24:58,704 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:24:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:24:58,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1930633076, now seen corresponding path program 1 times [2020-09-25 05:24:58,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:24:58,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630459262] [2020-09-25 05:24:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:24:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:24:58,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:24:58,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:24:59,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:24:59,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 05:24:59,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:24:59,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-09-25 05:24:59,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:24:59,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:24:59,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:24:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 05:24:59,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:24:59,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:24:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:24:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:24:59,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:24:59,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:24:59,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:24:59,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:24:59,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 05:24:59,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:24:59,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:24:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:24:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:24:59,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:24:59,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:24:59,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 05:24:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:24:59,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:24:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:24:59,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:24:59,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:24:59,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:24:59,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 05:24:59,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:24:59,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:24:59,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:24:59,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 05:24:59,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:24:59,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:24:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:24:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:24:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:24:59,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:24:59,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 05:24:59,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:24:59,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 05:24:59,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:24:59,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:24:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:24:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-25 05:24:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:24:59,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:24:59,515 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 05:24:59,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630459262] [2020-09-25 05:24:59,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:24:59,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:24:59,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752096689] [2020-09-25 05:24:59,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:24:59,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:24:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:24:59,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:24:59,548 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2020-09-25 05:24:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:24:59,916 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2020-09-25 05:24:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:24:59,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-09-25 05:24:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:24:59,934 INFO L225 Difference]: With dead ends: 176 [2020-09-25 05:24:59,934 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 05:24:59,940 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 05:24:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 05:25:00,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-09-25 05:25:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 05:25:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-09-25 05:25:00,008 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 35 [2020-09-25 05:25:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:25:00,009 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-09-25 05:25:00,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:25:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-09-25 05:25:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 05:25:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:25:00,013 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, 1, 1, 1] [2020-09-25 05:25:00,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:25:00,013 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:25:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:25:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash -330335414, now seen corresponding path program 1 times [2020-09-25 05:25:00,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:25:00,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215800171] [2020-09-25 05:25:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:25:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:00,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:00,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:00,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 05:25:00,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:00,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-09-25 05:25:00,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:00,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:00,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:25:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 05:25:00,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 05:25:00,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:00,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:25:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:00,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:00,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:25:00,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:00,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 05:25:00,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:00,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:25:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:25:00,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:25:00,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:00,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 05:25:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:00,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:00,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:00,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 05:25:00,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:00,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-25 05:25:00,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:00,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:00,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:25:00,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 05:25:00,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 05:25:00,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:00,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:25:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:00,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:00,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:00,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 05:25:00,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 05:25:00,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:00,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:00,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:25:00,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:25:00,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 05:25:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:00,652 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 05:25:00,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215800171] [2020-09-25 05:25:00,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:25:00,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 05:25:00,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757232912] [2020-09-25 05:25:00,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:25:00,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:25:00,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:25:00,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:25:00,656 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 6 states. [2020-09-25 05:25:00,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:25:00,886 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2020-09-25 05:25:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:25:00,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-25 05:25:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:25:00,891 INFO L225 Difference]: With dead ends: 123 [2020-09-25 05:25:00,892 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 05:25:00,893 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 05:25:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 05:25:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-09-25 05:25:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-25 05:25:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-09-25 05:25:00,909 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 49 [2020-09-25 05:25:00,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:25:00,910 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-09-25 05:25:00,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:25:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-09-25 05:25:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 05:25:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:25:00,912 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, 1, 1, 1, 1, 1, 1] [2020-09-25 05:25:00,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:25:00,913 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:25:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:25:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash -389367439, now seen corresponding path program 1 times [2020-09-25 05:25:00,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:25:00,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844440365] [2020-09-25 05:25:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:25:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:00,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:01,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:01,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-25 05:25:01,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:01,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 05:25:01,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:01,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:01,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:25:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 05:25:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 05:25:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:01,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:25:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:01,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:01,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:25:01,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:01,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 05:25:01,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:01,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:01,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:25:01,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:25:01,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:25:01,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:01,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 05:25:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:01,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:01,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:01,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 05:25:01,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:01,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-25 05:25:01,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:01,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:25:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 05:25:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 05:25:01,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:01,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:25:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:01,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:01,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 05:25:01,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:01,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-25 05:25:01,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:01,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:25:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:25:01,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 05:25:01,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:01,400 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 05:25:01,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844440365] [2020-09-25 05:25:01,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:25:01,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 05:25:01,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780958215] [2020-09-25 05:25:01,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:25:01,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:25:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:25:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:25:01,403 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 6 states. [2020-09-25 05:25:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:25:01,624 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-09-25 05:25:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:25:01,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-09-25 05:25:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:25:01,627 INFO L225 Difference]: With dead ends: 127 [2020-09-25 05:25:01,627 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 05:25:01,628 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 05:25:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 05:25:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-09-25 05:25:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-25 05:25:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-09-25 05:25:01,639 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 52 [2020-09-25 05:25:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:25:01,640 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-09-25 05:25:01,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:25:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-09-25 05:25:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 05:25:01,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:25:01,642 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, 1, 1, 1, 1, 1, 1] [2020-09-25 05:25:01,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:25:01,642 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:25:01,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:25:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash 323107249, now seen corresponding path program 1 times [2020-09-25 05:25:01,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:25:01,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610536033] [2020-09-25 05:25:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:25:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:25:01,678 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:25:01,679 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:25:01,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:25:01,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:25:01 BoogieIcfgContainer [2020-09-25 05:25:01,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:25:01,713 INFO L168 Benchmark]: Toolchain (without parser) took 4165.22 ms. Allocated memory was 138.9 MB in the beginning and 247.5 MB in the end (delta: 108.5 MB). Free memory was 101.9 MB in the beginning and 163.3 MB in the end (delta: -61.3 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:01,714 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:25:01,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.37 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 180.1 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:01,715 INFO L168 Benchmark]: Boogie Preprocessor took 54.16 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 177.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:01,716 INFO L168 Benchmark]: RCFGBuilder took 516.01 ms. Allocated memory is still 201.9 MB. Free memory was 177.6 MB in the beginning and 153.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:01,717 INFO L168 Benchmark]: TraceAbstraction took 3124.37 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 153.0 MB in the beginning and 163.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 35.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:01,721 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 461.37 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 180.1 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.16 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 177.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 516.01 ms. Allocated memory is still 201.9 MB. Free memory was 177.6 MB in the beginning and 153.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3124.37 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 153.0 MB in the beginning and 163.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 35.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 85]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 84, overapproximation of someUnaryDOUBLEoperation at line 80. Possible FailurePath: [L79] double x = 0.0; [L80] double y = -0.0; [L81] CALL, EXPR fmax_double(x, y) [L52] CALL, EXPR __fpclassify_double(x) [L24] __uint32_t msw, lsw; [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (msw) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lsw) = ew_u.parts.lsw [L33-L34] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L36-L37] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L39-L40] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L43-L44] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L47] return 0; [L52] RET, EXPR __fpclassify_double(x) [L52] COND TRUE __fpclassify_double(x) == 0 [L53] return y; [L81] RET, EXPR fmax_double(x, y) [L81] double res = fmax_double(x, y); [L84] EXPR res == 0.0 && __signbit_double(res) == 0 [L84] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L85] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 59 SDslu, 523 SDs, 0 SdLazy, 377 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, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred 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, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 188 NumberOfCodeBlocks, 188 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 11242 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...