/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:59:54,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:59:54,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:59:54,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:59:54,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:59:54,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:59:54,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:59:54,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:59:54,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:59:54,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:59:54,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:59:54,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:59:54,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:59:54,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:59:54,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:59:54,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:59:54,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:59:54,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:59:54,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:59:54,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:59:54,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:59:54,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:59:54,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:59:54,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:59:54,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:59:54,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:59:54,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:59:54,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:59:54,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:59:54,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:59:54,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:59:54,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:59:54,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:59:54,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:59:54,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:59:54,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:59:54,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:59:54,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:59:54,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:59:54,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:59:54,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:59:54,248 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 [2020-08-27 21:59:54,297 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:59:54,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:59:54,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:59:54,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:59:54,300 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:59:54,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:59:54,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:59:54,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:59:54,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:59:54,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:59:54,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:59:54,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:59:54,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:59:54,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:59:54,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:59:54,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:59:54,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:59:54,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:59:54,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:59:54,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:59:54,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:59:54,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:59:54,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:59:54,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:59:54,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:59:54,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:59:54,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:59:54,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:59:54,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:59:54,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:59:54,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:59:54,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:59:54,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:59:54,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:59:54,793 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:59:54,794 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-08-27 21:59:54,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3c0df3a8/91bc830434474218b75d72b7185910ba/FLAG4324f93fc [2020-08-27 21:59:55,471 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:59:55,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-08-27 21:59:55,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3c0df3a8/91bc830434474218b75d72b7185910ba/FLAG4324f93fc [2020-08-27 21:59:55,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3c0df3a8/91bc830434474218b75d72b7185910ba [2020-08-27 21:59:55,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:59:55,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:59:55,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:59:55,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:59:55,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:59:55,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:59:55" (1/1) ... [2020-08-27 21:59:55,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eb1efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:55, skipping insertion in model container [2020-08-27 21:59:55,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:59:55" (1/1) ... [2020-08-27 21:59:55,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:59:55,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:59:56,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:59:56,240 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:59:56,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:59:56,342 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:59:56,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56 WrapperNode [2020-08-27 21:59:56,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:59:56,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:59:56,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:59:56,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:59:56,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (1/1) ... [2020-08-27 21:59:56,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (1/1) ... [2020-08-27 21:59:56,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (1/1) ... [2020-08-27 21:59:56,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (1/1) ... [2020-08-27 21:59:56,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (1/1) ... [2020-08-27 21:59:56,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (1/1) ... [2020-08-27 21:59:56,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (1/1) ... [2020-08-27 21:59:56,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:59:56,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:59:56,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:59:56,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:59:56,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (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 [2020-08-27 21:59:56,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:59:56,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:59:56,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-27 21:59:56,527 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-08-27 21:59:56,527 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-08-27 21:59:56,527 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-08-27 21:59:56,527 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-08-27 21:59:56,528 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-08-27 21:59:56,528 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-08-27 21:59:56,528 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-08-27 21:59:56,528 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-08-27 21:59:56,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:59:56,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-27 21:59:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:59:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:59:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-27 21:59:56,529 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-08-27 21:59:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-27 21:59:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-27 21:59:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-08-27 21:59:56,530 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-08-27 21:59:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-08-27 21:59:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-08-27 21:59:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:59:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-08-27 21:59:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-08-27 21:59:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-27 21:59:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:59:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-27 21:59:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-27 21:59:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-27 21:59:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-27 21:59:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-27 21:59:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-27 21:59:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:59:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:59:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-27 21:59:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:59:56,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-27 21:59:56,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:59:57,584 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:59:57,584 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-08-27 21:59:57,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:59:57 BoogieIcfgContainer [2020-08-27 21:59:57,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:59:57,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:59:57,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:59:57,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:59:57,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:59:55" (1/3) ... [2020-08-27 21:59:57,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c4081a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:59:57, skipping insertion in model container [2020-08-27 21:59:57,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:59:56" (2/3) ... [2020-08-27 21:59:57,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c4081a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:59:57, skipping insertion in model container [2020-08-27 21:59:57,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:59:57" (3/3) ... [2020-08-27 21:59:57,601 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_2.c [2020-08-27 21:59:57,612 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:59:57,622 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:59:57,641 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:59:57,666 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:59:57,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:59:57,667 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:59:57,667 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:59:57,667 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:59:57,667 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:59:57,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:59:57,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:59:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-08-27 21:59:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-27 21:59:57,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:59:57,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:59:57,704 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:59:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:59:57,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-08-27 21:59:57,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:59:57,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783735123] [2020-08-27 21:59:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:59:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:58,345 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-27 21:59:58,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:59:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:58,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-27 21:59:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:58,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-27 21:59:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:59:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:59:58,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783735123] [2020-08-27 21:59:58,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:59:58,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:59:58,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612633686] [2020-08-27 21:59:58,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:59:58,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:59:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:59:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:59:58,503 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 5 states. [2020-08-27 21:59:58,701 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-27 22:00:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:01,670 INFO L93 Difference]: Finished difference Result 265 states and 406 transitions. [2020-08-27 22:00:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-27 22:00:01,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-08-27 22:00:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:01,696 INFO L225 Difference]: With dead ends: 265 [2020-08-27 22:00:01,697 INFO L226 Difference]: Without dead ends: 141 [2020-08-27 22:00:01,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-27 22:00:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-27 22:00:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2020-08-27 22:00:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-27 22:00:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-08-27 22:00:01,832 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-08-27 22:00:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:01,832 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-08-27 22:00:01,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 22:00:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-08-27 22:00:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-27 22:00:01,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:01,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 22:00:01,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 22:00:01,844 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:01,845 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-08-27 22:00:01,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:01,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561155741] [2020-08-27 22:00:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:02,120 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-27 22:00:02,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:02,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-27 22:00:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-27 22:00:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:02,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561155741] [2020-08-27 22:00:02,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 22:00:02,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 22:00:02,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473774649] [2020-08-27 22:00:02,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 22:00:02,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:02,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 22:00:02,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-27 22:00:02,249 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 6 states. [2020-08-27 22:00:02,358 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-27 22:00:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:03,726 INFO L93 Difference]: Finished difference Result 265 states and 381 transitions. [2020-08-27 22:00:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 22:00:03,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-27 22:00:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:03,732 INFO L225 Difference]: With dead ends: 265 [2020-08-27 22:00:03,734 INFO L226 Difference]: Without dead ends: 161 [2020-08-27 22:00:03,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-27 22:00:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-08-27 22:00:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2020-08-27 22:00:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-27 22:00:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2020-08-27 22:00:03,774 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 41 [2020-08-27 22:00:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:03,774 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2020-08-27 22:00:03,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 22:00:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2020-08-27 22:00:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-27 22:00:03,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:03,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 22:00:03,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 22:00:03,779 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1007450673, now seen corresponding path program 2 times [2020-08-27 22:00:03,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:03,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878409819] [2020-08-27 22:00:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:03,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:04,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-27 22:00:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:04,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-27 22:00:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:04,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878409819] [2020-08-27 22:00:04,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 22:00:04,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 22:00:04,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389060821] [2020-08-27 22:00:04,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 22:00:04,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 22:00:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-27 22:00:04,126 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand 7 states. [2020-08-27 22:00:04,237 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-27 22:00:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:07,624 INFO L93 Difference]: Finished difference Result 287 states and 415 transitions. [2020-08-27 22:00:07,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 22:00:07,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-08-27 22:00:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:07,629 INFO L225 Difference]: With dead ends: 287 [2020-08-27 22:00:07,629 INFO L226 Difference]: Without dead ends: 183 [2020-08-27 22:00:07,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 22:00:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-08-27 22:00:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 124. [2020-08-27 22:00:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-27 22:00:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2020-08-27 22:00:07,650 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 43 [2020-08-27 22:00:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:07,651 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2020-08-27 22:00:07,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 22:00:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2020-08-27 22:00:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-27 22:00:07,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:07,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 22:00:07,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 22:00:07,653 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1021433455, now seen corresponding path program 3 times [2020-08-27 22:00:07,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:07,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125757146] [2020-08-27 22:00:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:07,836 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-27 22:00:07,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 22:00:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:07,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-27 22:00:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:07,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-27 22:00:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 22:00:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 22:00:07,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125757146] [2020-08-27 22:00:07,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 22:00:07,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 22:00:07,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343618974] [2020-08-27 22:00:07,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 22:00:07,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 22:00:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 22:00:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-27 22:00:07,968 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand 8 states. [2020-08-27 22:00:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 22:00:09,633 INFO L93 Difference]: Finished difference Result 307 states and 447 transitions. [2020-08-27 22:00:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 22:00:09,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-08-27 22:00:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 22:00:09,637 INFO L225 Difference]: With dead ends: 307 [2020-08-27 22:00:09,637 INFO L226 Difference]: Without dead ends: 203 [2020-08-27 22:00:09,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-27 22:00:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-08-27 22:00:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 126. [2020-08-27 22:00:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-27 22:00:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2020-08-27 22:00:09,678 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 45 [2020-08-27 22:00:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 22:00:09,679 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2020-08-27 22:00:09,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 22:00:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2020-08-27 22:00:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-27 22:00:09,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 22:00:09,682 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 22:00:09,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 22:00:09,682 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 22:00:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 22:00:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1573985069, now seen corresponding path program 4 times [2020-08-27 22:00:09,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 22:00:09,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810714257] [2020-08-27 22:00:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 22:00:09,734 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-27 22:00:09,734 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-27 22:00:09,735 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 22:00:09,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 22:00:09,773 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-27 22:00:09,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 10:00:09 BoogieIcfgContainer [2020-08-27 22:00:09,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 22:00:09,780 INFO L168 Benchmark]: Toolchain (without parser) took 14037.64 ms. Allocated memory was 146.8 MB in the beginning and 305.7 MB in the end (delta: 158.9 MB). Free memory was 102.0 MB in the beginning and 165.9 MB in the end (delta: -63.9 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. [2020-08-27 22:00:09,782 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 22:00:09,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.12 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 101.8 MB in the beginning and 172.8 MB in the end (delta: -71.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-27 22:00:09,787 INFO L168 Benchmark]: Boogie Preprocessor took 105.66 ms. Allocated memory is still 202.9 MB. Free memory was 172.8 MB in the beginning and 168.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-27 22:00:09,793 INFO L168 Benchmark]: RCFGBuilder took 1141.31 ms. Allocated memory is still 202.9 MB. Free memory was 168.5 MB in the beginning and 106.6 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-08-27 22:00:09,794 INFO L168 Benchmark]: TraceAbstraction took 12185.66 ms. Allocated memory was 202.9 MB in the beginning and 305.7 MB in the end (delta: 102.8 MB). Free memory was 106.0 MB in the beginning and 165.9 MB in the end (delta: -60.0 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-08-27 22:00:09,804 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 598.12 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 101.8 MB in the beginning and 172.8 MB in the end (delta: -71.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.66 ms. Allocated memory is still 202.9 MB. Free memory was 172.8 MB in the beginning and 168.5 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1141.31 ms. Allocated memory is still 202.9 MB. Free memory was 168.5 MB in the beginning and 106.6 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12185.66 ms. Allocated memory was 202.9 MB in the beginning and 305.7 MB in the end (delta: 102.8 MB). Free memory was 106.0 MB in the beginning and 165.9 MB in the end (delta: -60.0 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 461]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L179] unsigned int Id_MCDC_104; [L180] UINT16 Id_MCDC_105; [L181] UINT16 Id_MCDC_106; [L182] Od_IndexTable* Id_MCDC_107; [L183] Od_IndexTable* Id_MCDC_108; [L184] Od_IndexTable* Id_MCDC_109; [L185] Od_IndexTable* Id_MCDC_110; [L186] Od_IndexTable* Id_MCDC_111; [L187] UINT32 Id_MCDC_112 [4]; [L188] CanOpenNode Id_MCDC_113; [L189] UINT32 Id_MCDC_114=0; [L427] void * Id_MCDC_143; [L428] void * Id_MCDC_144; [L429] void * Id_MCDC_145; [L430] void * Id_MCDC_146; [L431] void * Id_MCDC_147; [L432] void * Id_MCDC_148; [L433] int Id_MCDC_149; [L434] int Id_MCDC_150; [L435] int Id_MCDC_151; [L436] int Id_MCDC_152; [L437] int Id_MCDC_153; [L438] int Id_MCDC_154; [L439] int Id_MCDC_155; [L440] short Id_MCDC_156; [L441] short Id_MCDC_157; [L442] FILE* Id_MCDC_158; [L443] unsigned short Id_MCDC_159; [L444] unsigned short Id_MCDC_160; [L445] unsigned short Id_MCDC_161=0; [L446] unsigned short Id_MCDC_162=0; [L447] char Id_MCDC_163; [L448] char Id_MCDC_164; [L449] Id_MCDC_158 = fopen("in.eds", "r") [L450] COND FALSE !(Id_MCDC_158 == (( void * ) 0)) [L455] CALL Id_MCDC_100() [L420] int Id_MCDC_141; [L421] void * Id_MCDC_142; [L422] CALL Id_MCDC_99() [L400] CHAR Id_MCDC_139 [4]={0, 0, 0, 0}; [L401] UINT32 Id_MCDC_140=0; [L402] Id_MCDC_113.Id_MCDC_66 = ( PDO_Buffer* ) malloc(372) [L403] CALL Id_MCDC_97() [L331] UINT32 Id_MCDC_123; [L332] UINT32 Id_MCDC_124; [L333] UINT32 Id_MCDC_125; [L334] UINT32 Id_MCDC_126; [L335] UINT32 Id_MCDC_127; [L336] UINT32 Id_MCDC_128=0x00; [L337] UINT16 Id_MCDC_129; [L338] UINT32 Id_MCDC_130=0x00; [L339] UINT32 Id_MCDC_131=0x00; [L340] UINT8 Id_MCDC_35=0; [L341] UINT8 Id_MCDC_132=0; [L342] UINT8 Id_MCDC_36=0; [L343] UINT8 Id_MCDC_133=0; [L344] UINT8 Id_MCDC_134=0x00; [L345] INT32 Id_MCDC_135; [L346] void * Id_MCDC_136; [L347] UINT32* Id_MCDC_137; [L348] UINT16 Id_MCDC_138; [L349] Id_MCDC_123 = 0x1800 [L350] Id_MCDC_132 = 0 [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND TRUE Id_MCDC_132 < 4 [L352] Id_MCDC_112[Id_MCDC_132] = 0x1A00 + Id_MCDC_132 [L350] Id_MCDC_132++ [L350] COND FALSE !(Id_MCDC_132 < 4) [L354] COND FALSE !(Id_MCDC_123 <= 0x1803) [L396] return 0x00; [L336] UINT32 Id_MCDC_128=0x00; [L396] return 0x00; [L338] UINT32 Id_MCDC_130=0x00; [L396] return 0x00; [L339] UINT32 Id_MCDC_131=0x00; [L396] return 0x00; [L396] return 0x00; [L396] return 0x00; [L403] RET Id_MCDC_97() [L404] Id_MCDC_140 = 0 [L404] COND FALSE !(Id_MCDC_140 < 4) [L415] CALL Id_MCDC_95(4, Id_MCDC_139) [L280] UINT32 Id_MCDC_121=0; [L281] UINT32 Id_MCDC_122=0; [L282] COND FALSE !(Id_MCDC_93 < 2) [L286] COND FALSE !(Id_MCDC_93 != 2) [L292] EXPR Id_MCDC_94[1] [L292] Id_MCDC_122 = Id_MCDC_94[1] [L294] EXPR Id_MCDC_94[0] [L294] CALL Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L249] UINT32 Id_MCDC_117=0; [L250] UINT32 Id_MCDC_118=0; [L251] UINT32 Id_MCDC_119=1; [L252] UINT32 Id_MCDC_120=0; [L253] COND TRUE Id_MCDC_90 > Id_MCDC_91 [L255] Id_MCDC_117 = Id_MCDC_90 [L256] Id_MCDC_118 = Id_MCDC_91 [L268] COND TRUE Id_MCDC_119 != 0 [L270] CALL avoid_zero(Id_MCDC_118 != 0) [L9] COND FALSE !(!y) [L270] RET avoid_zero(Id_MCDC_118 != 0) [L271] Id_MCDC_120 = ( UINT32 ) (Id_MCDC_117 / Id_MCDC_118) [L272] CALL __VERIFIER_assert(( long long ) (Id_MCDC_117 - (Id_MCDC_120 * Id_MCDC_118)) >= 0 && ( long long ) (Id_MCDC_117 - (Id_MCDC_120 * Id_MCDC_118)) <= 4294967295) [L459] COND TRUE ! (Id_MCDC_103) [L461] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 132 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 12.0s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 705 SDtfs, 990 SDslu, 855 SDs, 0 SdLazy, 1941 SolverSat, 220 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 196 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 30316 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 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...