/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:39:16,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:39:16,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:39:16,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:39:16,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:39:16,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:39:16,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:39:16,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:39:16,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:39:16,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:39:16,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:39:16,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:39:16,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:39:16,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:39:16,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:39:16,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:39:16,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:39:16,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:39:16,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:39:16,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:39:16,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:39:16,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:39:16,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:39:16,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:39:16,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:39:16,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:39:16,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:39:16,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:39:16,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:39:16,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:39:16,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:39:16,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:39:16,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:39:16,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:39:16,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:39:16,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:39:16,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:39:16,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:39:16,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:39:16,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:39:16,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:39:16,119 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 [2020-10-29 09:39:16,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:39:16,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:39:16,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:39:16,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:39:16,159 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:39:16,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:39:16,159 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:39:16,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:39:16,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:39:16,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:39:16,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:39:16,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:39:16,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:39:16,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:39:16,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:39:16,162 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:39:16,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:39:16,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:39:16,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:39:16,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:39:16,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:39:16,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:39:16,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:39:16,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:39:16,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:39:16,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:39:16,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:39:16,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:39:16,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:39:16,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:39:16,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:39:16,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:39:16,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:39:16,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:39:16,639 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:39:16,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-10-29 09:39:16,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2521de6e1/c6c03c19fd7a44ff853f20793055b808/FLAG68e4e6198 [2020-10-29 09:39:17,305 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:39:17,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-10-29 09:39:17,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2521de6e1/c6c03c19fd7a44ff853f20793055b808/FLAG68e4e6198 [2020-10-29 09:39:17,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2521de6e1/c6c03c19fd7a44ff853f20793055b808 [2020-10-29 09:39:17,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:39:17,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:39:17,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:39:17,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:39:17,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:39:17,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e943c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17, skipping insertion in model container [2020-10-29 09:39:17,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:39:17,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:39:17,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:39:17,897 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:39:17,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:39:17,935 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:39:17,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17 WrapperNode [2020-10-29 09:39:17,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:39:17,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:39:17,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:39:17,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:39:17,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (1/1) ... [2020-10-29 09:39:17,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:39:17,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:39:17,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:39:17,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:39:17,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (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 [2020-10-29 09:39:18,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:39:18,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:39:18,060 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:39:18,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:39:18,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:39:18,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:39:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-29 09:39:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:39:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:39:18,061 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:39:18,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:39:18,062 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:39:18,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:39:18,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:39:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:39:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:39:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:39:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:39:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:39:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:39:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:39:18,525 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:39:18,525 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:39:18,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:39:18 BoogieIcfgContainer [2020-10-29 09:39:18,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:39:18,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:39:18,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:39:18,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:39:18,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:39:17" (1/3) ... [2020-10-29 09:39:18,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd7c841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:39:18, skipping insertion in model container [2020-10-29 09:39:18,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:39:17" (2/3) ... [2020-10-29 09:39:18,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd7c841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:39:18, skipping insertion in model container [2020-10-29 09:39:18,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:39:18" (3/3) ... [2020-10-29 09:39:18,541 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-10-29 09:39:18,555 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:39:18,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:39:18,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:39:18,619 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:39:18,620 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:39:18,620 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:39:18,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:39:18,620 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:39:18,620 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:39:18,620 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:39:18,621 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:39:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-29 09:39:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:39:18,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:18,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:18,681 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1812719549, now seen corresponding path program 1 times [2020-10-29 09:39:18,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:18,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057330604] [2020-10-29 09:39:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:18,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:19,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:19,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:39:19,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-29 09:39:19,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:19,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:19,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:39:19,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:19,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:39:19,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:19,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:19,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:19,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:19,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:19,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 09:39:19,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:19,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:19,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:39:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:39:19,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057330604] [2020-10-29 09:39:19,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:39:19,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:39:19,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209576293] [2020-10-29 09:39:19,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:39:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:39:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:39:19,193 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-29 09:39:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:19,257 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-29 09:39:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:39:19,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 09:39:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:19,267 INFO L225 Difference]: With dead ends: 37 [2020-10-29 09:39:19,267 INFO L226 Difference]: Without dead ends: 14 [2020-10-29 09:39:19,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:39:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-29 09:39:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-29 09:39:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-29 09:39:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-29 09:39:19,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-29 09:39:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:19,314 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-29 09:39:19,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:39:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-29 09:39:19,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:39:19,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:19,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:19,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:39:19,316 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 709604994, now seen corresponding path program 1 times [2020-10-29 09:39:19,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:19,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237725334] [2020-10-29 09:39:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:39:19,344 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:39:19,345 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:39:19,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:39:19,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:39:19 BoogieIcfgContainer [2020-10-29 09:39:19,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:39:19,367 INFO L168 Benchmark]: Toolchain (without parser) took 1695.27 ms. Allocated memory is still 158.3 MB. Free memory was 133.1 MB in the beginning and 109.6 MB in the end (delta: 23.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 8.0 GB. [2020-10-29 09:39:19,368 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:39:19,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.82 ms. Allocated memory is still 158.3 MB. Free memory was 132.4 MB in the beginning and 122.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:39:19,370 INFO L168 Benchmark]: Boogie Preprocessor took 41.48 ms. Allocated memory is still 158.3 MB. Free memory was 122.5 MB in the beginning and 121.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:39:19,371 INFO L168 Benchmark]: RCFGBuilder took 547.67 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 107.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:39:19,372 INFO L168 Benchmark]: TraceAbstraction took 832.50 ms. Allocated memory is still 158.3 MB. Free memory was 107.2 MB in the beginning and 109.6 MB in the end (delta: -2.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:39:19,376 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.82 ms. Allocated memory is still 158.3 MB. Free memory was 132.4 MB in the beginning and 122.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.48 ms. Allocated memory is still 158.3 MB. Free memory was 122.5 MB in the beginning and 121.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 547.67 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 107.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 832.50 ms. Allocated memory is still 158.3 MB. Free memory was 107.2 MB in the beginning and 109.6 MB in the end (delta: -2.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) [L14] CALL reach_error() [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 11 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 451 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...