/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/float-benchs/inv_Newton.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:23:54,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:23:54,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:23:54,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:23:54,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:23:54,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:23:54,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:23:54,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:23:54,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:23:54,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:23:54,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:23:54,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:23:54,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:23:54,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:23:54,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:23:54,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:23:54,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:23:54,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:23:54,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:23:54,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:23:54,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:23:54,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:23:54,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:23:54,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:23:54,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:23:54,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:23:54,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:23:54,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:23:54,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:23:54,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:23:54,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:23:54,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:23:54,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:23:54,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:23:54,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:23:54,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:23:54,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:23:54,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:23:54,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:23:54,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:23:54,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:23:54,163 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 [2020-10-28 14:23:54,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:23:54,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:23:54,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:23:54,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:23:54,192 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:23:54,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:23:54,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:23:54,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:23:54,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:23:54,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:23:54,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:23:54,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:23:54,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:23:54,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:23:54,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:23:54,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:23:54,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:23:54,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:23:54,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:23:54,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:23:54,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:23:54,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:23:54,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:23:54,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:23:54,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:23:54,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:23:54,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:23:54,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:23:54,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:23:54,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:23:54,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:23:54,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:23:54,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:23:54,612 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:23:54,613 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:23:54,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c [2020-10-28 14:23:54,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4e77a90/07ba8dfd5185456c9bef084460b14ede/FLAGc37eb7ee9 [2020-10-28 14:23:55,379 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:23:55,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/inv_Newton.c.p+cfa-reducer.c [2020-10-28 14:23:55,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4e77a90/07ba8dfd5185456c9bef084460b14ede/FLAGc37eb7ee9 [2020-10-28 14:23:55,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4e77a90/07ba8dfd5185456c9bef084460b14ede [2020-10-28 14:23:55,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:23:55,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:23:55,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:55,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:23:55,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:23:55,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1252bd66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55, skipping insertion in model container [2020-10-28 14:23:55,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:23:55,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:23:55,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:55,656 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:23:55,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:23:55,699 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:23:55,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55 WrapperNode [2020-10-28 14:23:55,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:23:55,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:23:55,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:23:55,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:23:55,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (1/1) ... [2020-10-28 14:23:55,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:23:55,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:23:55,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:23:55,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:23:55,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (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 [2020-10-28 14:23:55,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:23:55,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:23:55,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:23:55,819 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 14:23:55,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:23:55,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:23:55,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:23:55,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:23:55,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:23:55,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-28 14:23:55,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 14:23:55,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:23:55,820 INFO L130 BoogieDeclarations]: Found specification of procedure inv [2020-10-28 14:23:55,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:23:55,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-28 14:23:55,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:23:55,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:23:55,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-28 14:23:55,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:23:55,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:23:55,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:23:55,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:23:56,233 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:23:56,234 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:23:56,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:56 BoogieIcfgContainer [2020-10-28 14:23:56,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:23:56,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:23:56,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:23:56,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:23:56,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:23:55" (1/3) ... [2020-10-28 14:23:56,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709edfca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:56, skipping insertion in model container [2020-10-28 14:23:56,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:23:55" (2/3) ... [2020-10-28 14:23:56,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709edfca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:23:56, skipping insertion in model container [2020-10-28 14:23:56,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:23:56" (3/3) ... [2020-10-28 14:23:56,244 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_Newton.c.p+cfa-reducer.c [2020-10-28 14:23:56,256 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:23:56,260 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:23:56,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:23:56,300 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:23:56,301 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:23:56,301 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:23:56,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:23:56,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:23:56,301 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:23:56,301 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:23:56,302 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:23:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-28 14:23:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:23:56,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:56,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:56,326 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1303324310, now seen corresponding path program 1 times [2020-10-28 14:23:56,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:56,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248368103] [2020-10-28 14:23:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:56,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:56,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:56,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:56,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:56,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:23:56,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:23:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-28 14:23:56,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:56,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:23:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:23:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:23:56,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:23:57,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:57,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:57,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:57,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:57,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:23:57,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:57,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:57,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:23:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:57,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248368103] [2020-10-28 14:23:57,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:57,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:23:57,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440095766] [2020-10-28 14:23:57,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:23:57,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:23:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:23:57,178 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-10-28 14:23:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:57,340 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-10-28 14:23:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:23:57,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 14:23:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:57,353 INFO L225 Difference]: With dead ends: 43 [2020-10-28 14:23:57,353 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 14:23:57,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:23:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 14:23:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 14:23:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:23:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-10-28 14:23:57,421 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2020-10-28 14:23:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:57,421 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-10-28 14:23:57,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:23:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-10-28 14:23:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:23:57,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:57,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:57,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:23:57,424 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -835099163, now seen corresponding path program 1 times [2020-10-28 14:23:57,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:57,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130483869] [2020-10-28 14:23:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:57,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:23:57,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:23:57,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-28 14:23:57,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:57,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:57,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:23:57,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:23:57,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:23:57,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:23:57,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:57,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:57,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:57,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:57,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:23:57,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:57,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:57,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:57,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:57,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 14:23:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:57,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130483869] [2020-10-28 14:23:57,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:57,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:23:57,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338860261] [2020-10-28 14:23:57,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:23:57,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:23:57,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:57,740 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2020-10-28 14:23:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:57,845 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-10-28 14:23:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:23:57,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:23:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:57,846 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:23:57,847 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 14:23:57,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:23:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 14:23:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 14:23:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 14:23:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-28 14:23:57,854 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-28 14:23:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:57,855 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-28 14:23:57,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:23:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-28 14:23:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:23:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:57,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:23:57,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:23:57,856 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1848650314, now seen corresponding path program 1 times [2020-10-28 14:23:57,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:57,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096644256] [2020-10-28 14:23:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:57,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:57,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:23:57,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:57,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 14:23:57,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:57,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:23:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:23:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:23:57,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:23:57,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:23:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:23:57,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:23:57,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:23:57,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:23:57,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:23:57,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:23:57,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:23:57,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:23:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:23:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:23:57,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:23:57,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:23:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:23:57,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096644256] [2020-10-28 14:23:57,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:23:57,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:23:57,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776449990] [2020-10-28 14:23:57,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:23:57,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:23:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:23:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:57,998 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-28 14:23:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:23:58,062 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-28 14:23:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:23:58,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:23:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:23:58,064 INFO L225 Difference]: With dead ends: 35 [2020-10-28 14:23:58,064 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:23:58,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:23:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:23:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-10-28 14:23:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 14:23:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-28 14:23:58,072 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-28 14:23:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:23:58,072 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-28 14:23:58,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:23:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-28 14:23:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:23:58,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:23:58,073 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] [2020-10-28 14:23:58,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:23:58,073 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:23:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:23:58,074 INFO L82 PathProgramCache]: Analyzing trace with hash -920634168, now seen corresponding path program 1 times [2020-10-28 14:23:58,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:23:58,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629389249] [2020-10-28 14:23:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:23:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:23:58,113 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:23:58,114 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:23:58,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:23:58,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:23:58 BoogieIcfgContainer [2020-10-28 14:23:58,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:23:58,151 INFO L168 Benchmark]: Toolchain (without parser) took 2741.09 ms. Allocated memory is still 154.1 MB. Free memory was 128.9 MB in the beginning and 69.2 MB in the end (delta: 59.7 MB). Peak memory consumption was 60.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,152 INFO L168 Benchmark]: CDTParser took 1.48 ms. Allocated memory is still 154.1 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:23:58,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.89 ms. Allocated memory is still 154.1 MB. Free memory was 128.2 MB in the beginning and 117.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,154 INFO L168 Benchmark]: Boogie Preprocessor took 41.76 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 116.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,156 INFO L168 Benchmark]: RCFGBuilder took 491.57 ms. Allocated memory is still 154.1 MB. Free memory was 116.0 MB in the beginning and 131.2 MB in the end (delta: -15.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,157 INFO L168 Benchmark]: TraceAbstraction took 1910.46 ms. Allocated memory is still 154.1 MB. Free memory was 130.7 MB in the beginning and 69.2 MB in the end (delta: 61.5 MB). Peak memory consumption was 60.9 MB. Max. memory is 8.0 GB. [2020-10-28 14:23:58,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.48 ms. Allocated memory is still 154.1 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 285.89 ms. Allocated memory is still 154.1 MB. Free memory was 128.2 MB in the beginning and 117.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.76 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 116.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 491.57 ms. Allocated memory is still 154.1 MB. Free memory was 116.0 MB in the beginning and 131.2 MB in the end (delta: -15.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1910.46 ms. Allocated memory is still 154.1 MB. Free memory was 130.7 MB in the beginning and 69.2 MB in the end (delta: 61.5 MB). Peak memory consumption was 60.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 45, overapproximation of someBinaryArithmeticDOUBLEoperation at line 53, overapproximation of someBinaryDOUBLEComparisonOperation at line 83, overapproximation of to_real at line 46. Possible FailurePath: [L1] int __return_main; [L17] double __return_104; [L20] double main__a; [L21] double main__r; [L22] main__a = __VERIFIER_nondet_double() [L23] int main____CPAchecker_TMP_0; [L24] COND TRUE main__a >= 20.0 [L26] COND TRUE main__a <= 30.0 [L28] main____CPAchecker_TMP_0 = 1 [L30] COND TRUE main____CPAchecker_TMP_0 != 0 [L33] double __tmp_1; [L34] __tmp_1 = main__a [L35] double inv__A; [L36] inv__A = __tmp_1 [L37] double inv__xi; [L38] double inv__xsi; [L39] double inv__temp; [L40] signed int inv__cond; [L41] signed int inv__exp; [L42] union double_int inv__A_u; [L43] union double_int inv__xi_u; [L44] inv__A_u.d = inv__A [L45] EXPR inv__A_u.i [L45] inv__exp = ((signed int)(((inv__A_u.i) & 2146435072) >> 20)) - 1023 [L46] inv__xi_u.d = 1 [L47] inv__xi_u.i = (1023 - inv__exp) << 20 [L48] EXPR inv__xi_u.d [L48] inv__xi = inv__xi_u.d [L49] inv__cond = 1 [L51] COND TRUE !(inv__cond == 0) [L53] inv__xsi = (2 * inv__xi) - ((inv__A * inv__xi) * inv__xi) [L54] inv__temp = inv__xsi - inv__xi [L55] int inv____CPAchecker_TMP_0; [L56] COND FALSE !(inv__temp > 1.0E-10) [L67] COND FALSE !(inv__temp < -1.0E-10) [L73] inv____CPAchecker_TMP_0 = 0 [L61] inv__cond = inv____CPAchecker_TMP_0 [L62] inv__xi = inv__xsi [L51] COND FALSE !(!(inv__cond == 0)) [L80] __return_104 = inv__xi [L81] main__r = __return_104 [L82] int main____CPAchecker_TMP_1; [L83] COND FALSE !(main__r >= 0) [L108] main____CPAchecker_TMP_1 = 0 [L90] int __tmp_2; [L91] __tmp_2 = main____CPAchecker_TMP_1 [L92] int __VERIFIER_assert__cond; [L93] __VERIFIER_assert__cond = __tmp_2 [L94] COND TRUE __VERIFIER_assert__cond == 0 [L96] CALL reach_error() [L4] __assert_fail("0", "inv_Newton.c.p+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 31 SDslu, 84 SDs, 0 SdLazy, 106 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 2415 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...