/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-eb0fd7c [2020-09-21 10:30:19,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:30:19,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:30:19,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:30:19,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:30:19,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:30:19,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:30:19,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:30:19,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:30:19,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:30:19,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:30:19,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:30:19,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:30:19,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:30:19,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:30:19,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:30:19,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:30:19,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:30:19,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:30:19,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:30:19,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:30:19,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:30:19,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:30:19,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:30:19,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:30:19,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:30:19,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:30:19,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:30:19,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:30:19,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:30:19,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:30:19,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:30:19,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:30:19,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:30:19,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:30:19,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:30:19,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:30:19,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:30:19,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:30:19,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:30:19,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:30:19,394 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 [2020-09-21 10:30:19,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:30:19,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:30:19,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:30:19,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:30:19,422 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:30:19,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:30:19,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:30:19,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:30:19,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:30:19,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:30:19,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:30:19,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:30:19,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:30:19,427 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:30:19,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:30:19,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:30:19,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:30:19,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:30:19,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:30:19,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:30:19,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:30:19,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:30:19,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:30:19,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:30:19,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:30:19,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:30:19,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:30:19,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:30:19,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:30:19,430 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 [2020-09-21 10:30:19,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:30:19,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:30:19,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:30:19,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:30:19,924 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:30:19,926 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-09-21 10:30:20,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed9c9b432/a88aa273cc124be1b4d64242704aa49d/FLAGe18f16309 [2020-09-21 10:30:20,647 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:30:20,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-09-21 10:30:20,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed9c9b432/a88aa273cc124be1b4d64242704aa49d/FLAGe18f16309 [2020-09-21 10:30:20,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed9c9b432/a88aa273cc124be1b4d64242704aa49d [2020-09-21 10:30:20,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:30:20,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:30:20,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:20,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:30:20,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:30:20,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:20" (1/1) ... [2020-09-21 10:30:20,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:20, skipping insertion in model container [2020-09-21 10:30:20,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:20" (1/1) ... [2020-09-21 10:30:20,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:30:21,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:30:21,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:21,509 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:30:21,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:21,626 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:30:21,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21 WrapperNode [2020-09-21 10:30:21,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:21,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:30:21,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:30:21,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:30:21,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (1/1) ... [2020-09-21 10:30:21,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (1/1) ... [2020-09-21 10:30:21,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (1/1) ... [2020-09-21 10:30:21,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (1/1) ... [2020-09-21 10:30:21,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (1/1) ... [2020-09-21 10:30:21,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (1/1) ... [2020-09-21 10:30:21,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (1/1) ... [2020-09-21 10:30:21,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:30:21,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:30:21,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:30:21,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:30:21,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (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 [2020-09-21 10:30:21,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:30:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:30:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:30:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-09-21 10:30:21,838 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-09-21 10:30:21,839 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-09-21 10:30:21,839 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-09-21 10:30:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-09-21 10:30:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-09-21 10:30:21,840 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-09-21 10:30:21,841 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-09-21 10:30:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:30:21,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:30:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:30:21,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:30:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:30:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-09-21 10:30:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-21 10:30:21,844 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-21 10:30:21,845 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-09-21 10:30:21,846 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-09-21 10:30:21,846 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-09-21 10:30:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-09-21 10:30:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:30:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-09-21 10:30:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-09-21 10:30:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-21 10:30:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:30:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:30:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:30:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:30:21,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:30:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:30:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:30:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:30:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:30:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:30:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:30:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-21 10:30:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:30:23,037 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:30:23,038 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-09-21 10:30:23,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:23 BoogieIcfgContainer [2020-09-21 10:30:23,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:30:23,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:30:23,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:30:23,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:30:23,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:30:20" (1/3) ... [2020-09-21 10:30:23,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bae6aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:23, skipping insertion in model container [2020-09-21 10:30:23,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:21" (2/3) ... [2020-09-21 10:30:23,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bae6aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:23, skipping insertion in model container [2020-09-21 10:30:23,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:23" (3/3) ... [2020-09-21 10:30:23,055 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_2.c [2020-09-21 10:30:23,067 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:30:23,078 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:30:23,101 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:30:23,138 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:30:23,138 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:30:23,139 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:30:23,139 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:30:23,139 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:30:23,139 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:30:23,140 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:30:23,140 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:30:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-09-21 10:30:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 10:30:23,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:23,182 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] [2020-09-21 10:30:23,183 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-09-21 10:30:23,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:23,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571722951] [2020-09-21 10:30:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:23,784 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 10:30:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:23,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:23,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:30:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:23,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571722951] [2020-09-21 10:30:23,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:23,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:30:23,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787529278] [2020-09-21 10:30:23,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:30:23,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:30:23,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:30:23,947 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 5 states. [2020-09-21 10:30:24,115 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:27,156 INFO L93 Difference]: Finished difference Result 265 states and 406 transitions. [2020-09-21 10:30:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:30:27,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-09-21 10:30:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:27,186 INFO L225 Difference]: With dead ends: 265 [2020-09-21 10:30:27,186 INFO L226 Difference]: Without dead ends: 141 [2020-09-21 10:30:27,200 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 [2020-09-21 10:30:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-21 10:30:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2020-09-21 10:30:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 10:30:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-09-21 10:30:27,310 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-09-21 10:30:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:27,311 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-09-21 10:30:27,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:30:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-09-21 10:30:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:30:27,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:27,316 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] [2020-09-21 10:30:27,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:30:27,316 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-09-21 10:30:27,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:27,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319632541] [2020-09-21 10:30:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,516 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 10:30:27,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:30:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:27,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319632541] [2020-09-21 10:30:27,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:27,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:30:27,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484072039] [2020-09-21 10:30:27,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:30:27,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:30:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:30:27,629 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 6 states. [2020-09-21 10:30:27,755 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:28,895 INFO L93 Difference]: Finished difference Result 265 states and 381 transitions. [2020-09-21 10:30:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:30:28,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-21 10:30:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:28,900 INFO L225 Difference]: With dead ends: 265 [2020-09-21 10:30:28,901 INFO L226 Difference]: Without dead ends: 161 [2020-09-21 10:30:28,902 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 [2020-09-21 10:30:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-21 10:30:28,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2020-09-21 10:30:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-21 10:30:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2020-09-21 10:30:28,942 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 41 [2020-09-21 10:30:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:28,942 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2020-09-21 10:30:28,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:30:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2020-09-21 10:30:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 10:30:28,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:28,945 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] [2020-09-21 10:30:28,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:30:28,945 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1007450673, now seen corresponding path program 2 times [2020-09-21 10:30:28,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:28,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133778552] [2020-09-21 10:30:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:29,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:29,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:29,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:30:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:29,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133778552] [2020-09-21 10:30:29,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:29,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:30:29,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015587268] [2020-09-21 10:30:29,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:30:29,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:30:29,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:30:29,243 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand 7 states. [2020-09-21 10:30:29,370 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:34,852 INFO L93 Difference]: Finished difference Result 286 states and 414 transitions. [2020-09-21 10:30:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:30:34,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-09-21 10:30:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:34,857 INFO L225 Difference]: With dead ends: 286 [2020-09-21 10:30:34,857 INFO L226 Difference]: Without dead ends: 182 [2020-09-21 10:30:34,859 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 [2020-09-21 10:30:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-21 10:30:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 124. [2020-09-21 10:30:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-21 10:30:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2020-09-21 10:30:34,882 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 43 [2020-09-21 10:30:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:34,882 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2020-09-21 10:30:34,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:30:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2020-09-21 10:30:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:30:34,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:34,885 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] [2020-09-21 10:30:34,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:30:34,885 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1021433455, now seen corresponding path program 3 times [2020-09-21 10:30:34,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:34,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785666652] [2020-09-21 10:30:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:35,078 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 10:30:35,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:35,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:35,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:30:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:35,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785666652] [2020-09-21 10:30:35,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:35,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:30:35,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890272928] [2020-09-21 10:30:35,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:30:35,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:30:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:30:35,255 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand 8 states. [2020-09-21 10:30:35,400 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:36,966 INFO L93 Difference]: Finished difference Result 307 states and 447 transitions. [2020-09-21 10:30:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:30:36,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-09-21 10:30:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:36,969 INFO L225 Difference]: With dead ends: 307 [2020-09-21 10:30:36,969 INFO L226 Difference]: Without dead ends: 203 [2020-09-21 10:30:36,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:30:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-21 10:30:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 126. [2020-09-21 10:30:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-21 10:30:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2020-09-21 10:30:36,993 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 45 [2020-09-21 10:30:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:36,994 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2020-09-21 10:30:36,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:30:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2020-09-21 10:30:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 10:30:36,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:36,996 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] [2020-09-21 10:30:36,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:30:36,997 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1573985069, now seen corresponding path program 4 times [2020-09-21 10:30:36,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:36,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244976232] [2020-09-21 10:30:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:37,038 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-21 10:30:37,038 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-21 10:30:37,038 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:30:37,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:30:37,071 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-21 10:30:37,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:30:37 BoogieIcfgContainer [2020-09-21 10:30:37,072 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:30:37,074 INFO L168 Benchmark]: Toolchain (without parser) took 16105.97 ms. Allocated memory was 138.9 MB in the beginning and 315.1 MB in the end (delta: 176.2 MB). Free memory was 100.8 MB in the beginning and 217.0 MB in the end (delta: -116.2 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:37,075 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:30:37,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 654.03 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.1 MB in the beginning and 172.2 MB in the end (delta: -72.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:37,077 INFO L168 Benchmark]: Boogie Preprocessor took 94.90 ms. Allocated memory is still 201.9 MB. Free memory was 172.2 MB in the beginning and 167.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:37,078 INFO L168 Benchmark]: RCFGBuilder took 1321.41 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 105.9 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:37,079 INFO L168 Benchmark]: TraceAbstraction took 14026.22 ms. Allocated memory was 201.9 MB in the beginning and 315.1 MB in the end (delta: 113.2 MB). Free memory was 105.2 MB in the beginning and 217.0 MB in the end (delta: -111.8 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:37,083 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 654.03 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.1 MB in the beginning and 172.2 MB in the end (delta: -72.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 94.90 ms. Allocated memory is still 201.9 MB. Free memory was 172.2 MB in the beginning and 167.8 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1321.41 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 105.9 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14026.22 ms. Allocated memory was 201.9 MB in the beginning and 315.1 MB in the end (delta: 113.2 MB). Free memory was 105.2 MB in the beginning and 217.0 MB in the end (delta: -111.8 MB). Peak memory consumption was 1.5 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: 13.9s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 11.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 705 SDtfs, 992 SDslu, 855 SDs, 0 SdLazy, 1942 SolverSat, 218 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 10.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s 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, 195 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s 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...