/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/float-benchs/interpolation.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:03:45,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:03:45,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:03:45,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:03:45,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:03:45,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:03:45,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:03:45,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:03:45,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:03:45,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:03:45,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:03:45,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:03:45,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:03:45,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:03:45,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:03:45,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:03:45,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:03:45,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:03:45,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:03:45,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:03:45,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:03:45,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:03:45,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:03:45,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:03:45,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:03:45,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:03:45,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:03:45,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:03:45,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:03:45,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:03:45,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:03:45,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:03:45,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:03:45,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:03:45,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:03:45,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:03:45,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:03:45,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:03:45,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:03:45,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:03:45,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:03:45,172 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 09:03:45,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:03:45,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:03:45,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:03:45,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:03:45,220 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:03:45,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:03:45,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:03:45,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:03:45,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:03:45,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:03:45,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:03:45,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:03:45,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:03:45,222 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:03:45,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:03:45,223 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:03:45,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:03:45,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:03:45,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:03:45,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:03:45,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:03:45,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:03:45,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:03:45,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:03:45,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:03:45,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:03:45,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:03:45,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:03:45,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:03:45,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:03:45,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:03:45,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:03:45,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:03:45,605 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:03:45,606 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:03:45,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/interpolation.c [2020-10-29 09:03:45,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c6471433/6e48285df38a451dbac3fca5c42c0fd1/FLAG16605e862 [2020-10-29 09:03:46,332 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:03:46,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/interpolation.c [2020-10-29 09:03:46,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c6471433/6e48285df38a451dbac3fca5c42c0fd1/FLAG16605e862 [2020-10-29 09:03:46,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c6471433/6e48285df38a451dbac3fca5c42c0fd1 [2020-10-29 09:03:46,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:03:46,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:03:46,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:03:46,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:03:46,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:03:46,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:46,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a0a6aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46, skipping insertion in model container [2020-10-29 09:03:46,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:46,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:03:46,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:03:46,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:03:46,913 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:03:46,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:03:46,957 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:03:46,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46 WrapperNode [2020-10-29 09:03:46,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:03:46,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:03:46,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:03:46,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:03:46,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:46,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:46,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:46,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:46,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:47,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:47,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (1/1) ... [2020-10-29 09:03:47,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:03:47,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:03:47,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:03:47,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:03:47,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (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 09:03:47,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:03:47,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:03:47,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:03:47,099 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:03:47,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:03:47,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:03:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:03:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:03:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:03:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:03:47,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-29 09:03:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:03:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:03:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:03:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-29 09:03:47,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-29 09:03:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:03:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:03:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:03:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:03:47,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-29 09:03:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:03:47,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:03:47,484 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:03:47,485 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:03:47,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:03:47 BoogieIcfgContainer [2020-10-29 09:03:47,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:03:47,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:03:47,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:03:47,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:03:47,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:03:46" (1/3) ... [2020-10-29 09:03:47,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9fc848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:03:47, skipping insertion in model container [2020-10-29 09:03:47,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:03:46" (2/3) ... [2020-10-29 09:03:47,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9fc848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:03:47, skipping insertion in model container [2020-10-29 09:03:47,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:03:47" (3/3) ... [2020-10-29 09:03:47,509 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c [2020-10-29 09:03:47,523 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:03:47,529 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:03:47,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:03:47,597 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:03:47,598 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:03:47,598 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:03:47,598 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:03:47,598 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:03:47,598 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:03:47,599 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:03:47,599 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:03:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-29 09:03:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:03:47,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:03:47,640 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] [2020-10-29 09:03:47,640 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:03:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:03:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash -538560238, now seen corresponding path program 1 times [2020-10-29 09:03:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:03:47,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136724403] [2020-10-29 09:03:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:03:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:03:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:03:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-29 09:03:48,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:48,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:03:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:03:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:03:48,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:03:48,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:03:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:48,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:48,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:03:48,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:03:48,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 09:03:48,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:48,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:03:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:03:48,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:03:48,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:03:48,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 09:03:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:48,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:48,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:03:48,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:03:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:03:48,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:48,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:48,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:03:48,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-29 09:03:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:03:48,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:03:48,293 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 09:03:48,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136724403] [2020-10-29 09:03:48,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:03:48,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:03:48,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606915598] [2020-10-29 09:03:48,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:03:48,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:03:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:03:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:03:48,332 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-29 09:03:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:03:48,477 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-29 09:03:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:03:48,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-29 09:03:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:03:48,487 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:03:48,488 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:03:48,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 09:03:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:03:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:03:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:03:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-29 09:03:48,534 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-29 09:03:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:03:48,534 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-29 09:03:48,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:03:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-29 09:03:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:03:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:03:48,536 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] [2020-10-29 09:03:48,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:03:48,536 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:03:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:03:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1010101559, now seen corresponding path program 1 times [2020-10-29 09:03:48,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:03:48,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055640496] [2020-10-29 09:03:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:03:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:48,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:48,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:48,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:48,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:03:48,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:03:48,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-29 09:03:48,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:48,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:03:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:03:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:03:48,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:03:49,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:03:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:49,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:49,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:49,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:03:49,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:03:49,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:03:49,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:49,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:49,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:03:49,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:03:49,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:03:49,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:03:49,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 09:03:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:49,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:49,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:49,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:03:49,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:03:49,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:03:49,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:49,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:49,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:03:49,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:03:49,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:03:49,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:03:49,195 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-10-29 09:03:49,277 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 09:03:49,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055640496] [2020-10-29 09:03:49,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:03:49,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:03:49,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684108781] [2020-10-29 09:03:49,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:03:49,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:03:49,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:03:49,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:03:49,288 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-29 09:03:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:03:49,489 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-29 09:03:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:03:49,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-29 09:03:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:03:49,492 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:03:49,492 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:03:49,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:03:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:03:49,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:03:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:03:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-29 09:03:49,505 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-29 09:03:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:03:49,506 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-29 09:03:49,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:03:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-29 09:03:49,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:03:49,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:03:49,508 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] [2020-10-29 09:03:49,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:03:49,508 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:03:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:03:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1015691, now seen corresponding path program 1 times [2020-10-29 09:03:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:03:49,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401974456] [2020-10-29 09:03:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:03:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:49,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:49,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:49,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:03:49,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:03:49,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-29 09:03:49,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:49,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:03:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:03:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:03:49,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:03:49,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:03:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:49,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:49,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:03:49,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:03:49,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 09:03:49,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:49,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:49,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:03:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:03:49,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:03:49,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:03:49,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-29 09:03:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:03:49,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:03:49,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:03:49,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:03:49,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:03:49,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:03:49,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:03:49,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:03:49,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:03:49,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:03:49,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:03:49,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:03:49,700 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 09:03:49,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401974456] [2020-10-29 09:03:49,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:03:49,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:03:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310008115] [2020-10-29 09:03:49,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:03:49,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:03:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:03:49,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:03:49,707 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2020-10-29 09:03:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:03:49,786 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-29 09:03:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:03:49,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-29 09:03:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:03:49,788 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:03:49,788 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:03:49,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:03:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:03:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-29 09:03:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:03:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-29 09:03:49,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2020-10-29 09:03:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:03:49,796 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-29 09:03:49,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:03:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-29 09:03:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:03:49,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:03:49,798 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] [2020-10-29 09:03:49,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:03:49,798 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:03:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:03:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash 94106687, now seen corresponding path program 1 times [2020-10-29 09:03:49,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:03:49,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711593976] [2020-10-29 09:03:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:03:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:03:49,814 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:03:49,814 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:03:49,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:03:49,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:03:49 BoogieIcfgContainer [2020-10-29 09:03:49,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:03:49,837 INFO L168 Benchmark]: Toolchain (without parser) took 3151.33 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 110.6 MB in the end (delta: 16.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:03:49,838 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:03:49,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.93 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 116.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:03:49,840 INFO L168 Benchmark]: Boogie Preprocessor took 49.97 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:03:49,841 INFO L168 Benchmark]: RCFGBuilder took 485.76 ms. Allocated memory is still 152.0 MB. Free memory was 115.0 MB in the beginning and 99.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:03:49,842 INFO L168 Benchmark]: TraceAbstraction took 2337.84 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 98.9 MB in the beginning and 110.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:03:49,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.93 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 116.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.97 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 485.76 ms. Allocated memory is still 152.0 MB. Free memory was 115.0 MB in the beginning and 99.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2337.84 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 98.9 MB in the beginning and 110.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 26, overapproximation of to_real at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 24. Possible FailurePath: [L13] int i; [L14] float z, t; [L15] float min[] = { 5, 10, 12, 30, 150 }; [L16] float max[] = { 10, 12, 30, 150, 300 }; [L18] t = __VERIFIER_nondet_float() [L19] EXPR min[0] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] CALL assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L7] COND FALSE !(!cond) [L19] RET assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L21] i = 0 [L21] COND TRUE i < sizeof(min) / sizeof(min[0]) [L22] EXPR max[i] [L22] COND TRUE t <= max[i] [L24] EXPR min[i] [L24] EXPR max[i] [L24] EXPR min[i] [L24] z = (t - min[i]) / (max[i] - min[i]) [L26] CALL __VERIFIER_assert(z >= 0.f && z <= 1.f) [L9] COND TRUE !(cond) [L9] CALL reach_error() [L3] __assert_fail("0", "interpolation.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 26 SDslu, 63 SDs, 0 SdLazy, 85 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 1.3s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 3458 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...