/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 true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:17:24,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:17:24,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:17:24,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:17:24,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:17:24,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:17:24,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:17:24,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:17:24,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:17:24,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:17:24,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:17:24,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:17:24,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:17:24,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:17:24,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:17:24,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:17:24,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:17:24,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:17:24,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:17:24,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:17:24,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:17:24,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:17:24,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:17:24,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:17:24,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:17:24,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:17:24,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:17:24,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:17:24,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:17:24,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:17:24,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:17:24,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:17:24,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:17:24,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:17:24,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:17:24,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:17:24,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:17:24,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:17:24,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:17:24,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:17:24,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:17:24,217 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 [2020-08-21 18:17:24,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:17:24,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:17:24,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:17:24,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:17:24,258 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:17:24,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:17:24,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:17:24,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:17:24,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:17:24,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:17:24,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:17:24,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:17:24,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:17:24,261 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:17:24,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:17:24,262 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:17:24,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:17:24,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:17:24,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:17:24,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:17:24,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:17:24,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:17:24,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:17:24,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:17:24,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:17:24,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:17:24,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:17:24,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:17:24,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:17:24,264 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 -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:17:24,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:17:24,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:17:24,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:17:24,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:17:24,559 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:17:24,560 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_5.c [2020-08-21 18:17:24,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/602acdc1c/c1862f8870c647a19566a0baf1d308cf/FLAG63147301c [2020-08-21 18:17:25,203 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:17:25,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_5.c [2020-08-21 18:17:25,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/602acdc1c/c1862f8870c647a19566a0baf1d308cf/FLAG63147301c [2020-08-21 18:17:25,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/602acdc1c/c1862f8870c647a19566a0baf1d308cf [2020-08-21 18:17:25,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:17:25,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:17:25,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:17:25,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:17:25,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:17:25,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:17:25" (1/1) ... [2020-08-21 18:17:25,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be84ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:25, skipping insertion in model container [2020-08-21 18:17:25,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:17:25" (1/1) ... [2020-08-21 18:17:25,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:17:25,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:17:25,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:17:25,969 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:17:26,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:17:26,061 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:17:26,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26 WrapperNode [2020-08-21 18:17:26,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:17:26,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:17:26,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:17:26,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:17:26,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (1/1) ... [2020-08-21 18:17:26,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (1/1) ... [2020-08-21 18:17:26,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (1/1) ... [2020-08-21 18:17:26,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (1/1) ... [2020-08-21 18:17:26,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (1/1) ... [2020-08-21 18:17:26,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (1/1) ... [2020-08-21 18:17:26,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (1/1) ... [2020-08-21 18:17:26,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:17:26,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:17:26,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:17:26,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:17:26,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (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 [2020-08-21 18:17:26,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:17:26,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:17:26,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 18:17:26,221 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-08-21 18:17:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-08-21 18:17:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-08-21 18:17:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-08-21 18:17:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-08-21 18:17:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-08-21 18:17:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-08-21 18:17:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-08-21 18:17:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:17:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:17:26,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:17:26,223 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:17:26,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 18:17:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-08-21 18:17:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-21 18:17:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-21 18:17:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-08-21 18:17:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-08-21 18:17:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-08-21 18:17:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-08-21 18:17:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:17:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-08-21 18:17:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-08-21 18:17:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 18:17:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:17:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:17:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:17:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:17:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:17:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 18:17:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:17:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:17:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:17:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:17:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:17:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 18:17:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:17:27,290 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:17:27,290 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-08-21 18:17:27,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:17:27 BoogieIcfgContainer [2020-08-21 18:17:27,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:17:27,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:17:27,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:17:27,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:17:27,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:17:25" (1/3) ... [2020-08-21 18:17:27,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed16071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:17:27, skipping insertion in model container [2020-08-21 18:17:27,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:26" (2/3) ... [2020-08-21 18:17:27,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed16071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:17:27, skipping insertion in model container [2020-08-21 18:17:27,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:17:27" (3/3) ... [2020-08-21 18:17:27,305 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_5.c [2020-08-21 18:17:27,313 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:17:27,320 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:17:27,334 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:17:27,357 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:17:27,357 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:17:27,358 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:17:27,358 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:17:27,358 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:17:27,358 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:17:27,358 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:17:27,359 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:17:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-08-21 18:17:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 18:17:27,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:27,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:27,391 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1328586124, now seen corresponding path program 1 times [2020-08-21 18:17:27,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:27,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167718045] [2020-08-21 18:17:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:27,945 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-21 18:17:27,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:28,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 18:17:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:28,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 18:17:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:28,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 18:17:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:28,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167718045] [2020-08-21 18:17:28,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:17:28,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:17:28,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84396807] [2020-08-21 18:17:28,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:17:28,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:28,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:17:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:17:28,102 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 5 states. [2020-08-21 18:17:28,250 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-21 18:17:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:29,219 INFO L93 Difference]: Finished difference Result 266 states and 409 transitions. [2020-08-21 18:17:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:17:29,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-08-21 18:17:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:29,237 INFO L225 Difference]: With dead ends: 266 [2020-08-21 18:17:29,237 INFO L226 Difference]: Without dead ends: 141 [2020-08-21 18:17:29,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:17:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-21 18:17:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2020-08-21 18:17:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-08-21 18:17:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 168 transitions. [2020-08-21 18:17:29,317 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 168 transitions. Word has length 43 [2020-08-21 18:17:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:29,318 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 168 transitions. [2020-08-21 18:17:29,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:17:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 168 transitions. [2020-08-21 18:17:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 18:17:29,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:29,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:29,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:17:29,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash -294008176, now seen corresponding path program 1 times [2020-08-21 18:17:29,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:29,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859957435] [2020-08-21 18:17:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:29,519 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-08-21 18:17:29,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:29,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 18:17:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:29,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 18:17:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:29,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 18:17:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:29,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859957435] [2020-08-21 18:17:29,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:29,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:17:29,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105173086] [2020-08-21 18:17:29,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:17:29,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:17:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:17:29,652 INFO L87 Difference]: Start difference. First operand 121 states and 168 transitions. Second operand 6 states. [2020-08-21 18:17:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:30,760 INFO L93 Difference]: Finished difference Result 267 states and 385 transitions. [2020-08-21 18:17:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:17:30,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-08-21 18:17:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:30,765 INFO L225 Difference]: With dead ends: 267 [2020-08-21 18:17:30,766 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 18:17:30,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:17:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 18:17:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 123. [2020-08-21 18:17:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-21 18:17:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2020-08-21 18:17:30,793 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 45 [2020-08-21 18:17:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:30,793 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2020-08-21 18:17:30,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:17:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2020-08-21 18:17:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 18:17:30,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:30,797 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, 1, 1, 1, 1] [2020-08-21 18:17:30,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:17:30,797 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1235066606, now seen corresponding path program 2 times [2020-08-21 18:17:30,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:30,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101288695] [2020-08-21 18:17:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:30,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:30,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 18:17:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:31,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 18:17:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:17:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:31,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101288695] [2020-08-21 18:17:31,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:31,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:17:31,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591157325] [2020-08-21 18:17:31,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:17:31,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:31,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:17:31,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:17:31,063 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand 7 states. [2020-08-21 18:17:31,199 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-08-21 18:17:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:34,757 INFO L93 Difference]: Finished difference Result 289 states and 419 transitions. [2020-08-21 18:17:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:17:34,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-08-21 18:17:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:34,772 INFO L225 Difference]: With dead ends: 289 [2020-08-21 18:17:34,772 INFO L226 Difference]: Without dead ends: 184 [2020-08-21 18:17:34,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:17:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-08-21 18:17:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 125. [2020-08-21 18:17:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 18:17:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2020-08-21 18:17:34,806 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 47 [2020-08-21 18:17:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:34,807 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2020-08-21 18:17:34,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:17:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2020-08-21 18:17:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 18:17:34,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:34,809 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, 1, 1, 1, 1] [2020-08-21 18:17:34,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:17:34,810 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 645881620, now seen corresponding path program 3 times [2020-08-21 18:17:34,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:34,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609376839] [2020-08-21 18:17:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:34,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 18:17:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:35,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 18:17:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:35,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 18:17:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:35,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609376839] [2020-08-21 18:17:35,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:35,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:17:35,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691228107] [2020-08-21 18:17:35,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:17:35,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:17:35,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:17:35,045 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand 8 states. [2020-08-21 18:17:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:36,655 INFO L93 Difference]: Finished difference Result 309 states and 451 transitions. [2020-08-21 18:17:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:17:36,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-08-21 18:17:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:36,658 INFO L225 Difference]: With dead ends: 309 [2020-08-21 18:17:36,659 INFO L226 Difference]: Without dead ends: 204 [2020-08-21 18:17:36,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:17:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-08-21 18:17:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 127. [2020-08-21 18:17:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 18:17:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2020-08-21 18:17:36,679 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 49 [2020-08-21 18:17:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:36,679 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2020-08-21 18:17:36,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:17:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2020-08-21 18:17:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:17:36,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:36,681 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, 1, 1, 1, 1] [2020-08-21 18:17:36,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:17:36,682 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:36,682 INFO L82 PathProgramCache]: Analyzing trace with hash 55895190, now seen corresponding path program 4 times [2020-08-21 18:17:36,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:36,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907659810] [2020-08-21 18:17:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:36,709 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-21 18:17:36,709 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-21 18:17:36,709 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:17:36,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:17:36,736 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-21 18:17:36,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:17:36 BoogieIcfgContainer [2020-08-21 18:17:36,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:17:36,739 INFO L168 Benchmark]: Toolchain (without parser) took 11235.35 ms. Allocated memory was 142.1 MB in the beginning and 302.5 MB in the end (delta: 160.4 MB). Free memory was 103.9 MB in the beginning and 104.3 MB in the end (delta: -367.7 kB). Peak memory consumption was 160.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:17:36,740 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:17:36,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 557.28 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 103.7 MB in the beginning and 175.2 MB in the end (delta: -71.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:17:36,742 INFO L168 Benchmark]: Boogie Preprocessor took 85.03 ms. Allocated memory is still 205.5 MB. Free memory was 175.2 MB in the beginning and 171.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:17:36,742 INFO L168 Benchmark]: RCFGBuilder took 1148.40 ms. Allocated memory is still 205.5 MB. Free memory was 171.1 MB in the beginning and 108.5 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:17:36,743 INFO L168 Benchmark]: TraceAbstraction took 9439.71 ms. Allocated memory was 205.5 MB in the beginning and 302.5 MB in the end (delta: 97.0 MB). Free memory was 107.8 MB in the beginning and 104.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 100.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:17:36,747 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 557.28 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 103.7 MB in the beginning and 175.2 MB in the end (delta: -71.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.03 ms. Allocated memory is still 205.5 MB. Free memory was 175.2 MB in the beginning and 171.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1148.40 ms. Allocated memory is still 205.5 MB. Free memory was 171.1 MB in the beginning and 108.5 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9439.71 ms. Allocated memory was 205.5 MB in the beginning and 302.5 MB in the end (delta: 97.0 MB). Free memory was 107.8 MB in the beginning and 104.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 100.6 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, EXPR 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 FALSE !(Id_MCDC_90 > Id_MCDC_91) [L259] COND FALSE !(Id_MCDC_90 < Id_MCDC_91) [L266] return Id_MCDC_90; [L294] RET, EXPR Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L294] Id_MCDC_121 = Id_MCDC_92(Id_MCDC_94[0], Id_MCDC_122) [L295] CALL avoid_zero(Id_MCDC_121 != 0) [L9] COND FALSE !(!y) [L295] RET avoid_zero(Id_MCDC_121 != 0) [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) (Id_MCDC_94[0] * Id_MCDC_122) >= 0 && ( long long ) (Id_MCDC_94[0] * Id_MCDC_122) <= 4294967295 [L296] EXPR Id_MCDC_94[0] [L296] EXPR ( long long ) (Id_MCDC_94[0] * Id_MCDC_122) >= 0 && ( long long ) (Id_MCDC_94[0] * Id_MCDC_122) <= 4294967295 [L296] CALL __VERIFIER_assert(( long long ) (Id_MCDC_94[0] * Id_MCDC_122) >= 0 && ( long long ) (Id_MCDC_94[0] * Id_MCDC_122) <= 4294967295) [L459] COND TRUE ! (Id_MCDC_103) [L461] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 9.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 705 SDtfs, 1026 SDslu, 802 SDs, 0 SdLazy, 1862 SolverSat, 224 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred 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, 195 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 184 NumberOfCodeBlocks, 184 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 33980 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...