/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:30:17,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:30:17,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:30:17,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:30:17,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:30:17,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:30:17,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:30:17,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:30:17,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:30:17,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:30:17,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:30:17,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:30:17,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:30:17,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:30:17,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:30:17,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:30:17,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:30:17,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:30:17,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:30:17,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:30:17,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:30:17,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:30:17,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:30:17,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:30:17,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:30:17,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:30:17,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:30:17,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:30:17,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:30:17,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 10:30:17,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:30:17,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:30:17,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:30:17,717 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 10:30:17,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:30:17,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:30:17,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:30:17,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:30:17,774 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:30:17,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:30:17,775 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:30:17,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:30:17,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:30:17,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:30:17,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:30:17,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:30:17,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:30:17,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:30:17,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:30:17,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:30:17,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:30:17,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:30:17,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:30:17,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:30:17,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:30:17,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:30:17,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:30:17,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:30:17,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:30:17,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:30:17,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:30:17,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:30:17,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:30:17,781 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 10:30:18,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:30:18,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:30:18,252 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:30:18,254 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:30:18,255 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:30:18,256 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_1.c [2020-09-21 10:30:18,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33a830d4f/abcb13a0675c4f979fc2eb69cce6436a/FLAG8e77d11f0 [2020-09-21 10:30:18,965 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:30:18,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_1.c [2020-09-21 10:30:18,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33a830d4f/abcb13a0675c4f979fc2eb69cce6436a/FLAG8e77d11f0 [2020-09-21 10:30:19,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33a830d4f/abcb13a0675c4f979fc2eb69cce6436a [2020-09-21 10:30:19,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:30:19,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:30:19,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:19,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:30:19,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:30:19,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:19,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ccd168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19, skipping insertion in model container [2020-09-21 10:30:19,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:19,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:30:19,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:30:19,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:19,842 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:30:19,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:19,953 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:30:19,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19 WrapperNode [2020-09-21 10:30:19,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:19,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:30:19,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:30:19,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:30:19,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:19,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:19,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:19,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:20,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:20,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:20,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (1/1) ... [2020-09-21 10:30:20,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:30:20,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:30:20,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:30:20,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:30:20,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (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 10:30:20,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:30:20,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:30:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:30:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-09-21 10:30:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_107 [2020-09-21 10:30:20,184 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_110 [2020-09-21 10:30:20,185 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_113 [2020-09-21 10:30:20,185 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_114 [2020-09-21 10:30:20,186 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_115 [2020-09-21 10:30:20,186 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_117 [2020-09-21 10:30:20,187 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_118 [2020-09-21 10:30:20,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:30:20,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:30:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:30:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:30:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:30:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-09-21 10:30:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-21 10:30:20,190 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_107 [2020-09-21 10:30:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_110 [2020-09-21 10:30:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_113 [2020-09-21 10:30:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_114 [2020-09-21 10:30:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_115 [2020-09-21 10:30:20,191 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:30:20,192 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_117 [2020-09-21 10:30:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_118 [2020-09-21 10:30:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-21 10:30:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:30:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:30:20,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:30:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:30:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:30:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 10:30:20,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:30:20,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:30:20,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:30:20,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:30:20,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:30:20,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-21 10:30:20,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:30:21,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:30:21,146 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-09-21 10:30:21,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:21 BoogieIcfgContainer [2020-09-21 10:30:21,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:30:21,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:30:21,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:30:21,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:30:21,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:30:19" (1/3) ... [2020-09-21 10:30:21,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a9e44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:21, skipping insertion in model container [2020-09-21 10:30:21,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:19" (2/3) ... [2020-09-21 10:30:21,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a9e44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:21, skipping insertion in model container [2020-09-21 10:30:21,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:21" (3/3) ... [2020-09-21 10:30:21,170 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_1.c [2020-09-21 10:30:21,183 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:30:21,196 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:30:21,220 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:30:21,261 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:30:21,261 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:30:21,261 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:30:21,261 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:30:21,261 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:30:21,262 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:30:21,262 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:30:21,262 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:30:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2020-09-21 10:30:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 10:30:21,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:21,301 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] [2020-09-21 10:30:21,301 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:21,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1921771477, now seen corresponding path program 1 times [2020-09-21 10:30:21,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:21,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304904983] [2020-09-21 10:30:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:21,855 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 10:30:21,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:21,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:21,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:30:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:21,967 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 10:30:21,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304904983] [2020-09-21 10:30:21,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:21,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:30:21,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930715747] [2020-09-21 10:30:21,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:30:21,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:30:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:30:22,008 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 5 states. [2020-09-21 10:30:22,206 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:23,572 INFO L93 Difference]: Finished difference Result 262 states and 403 transitions. [2020-09-21 10:30:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:30:23,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-21 10:30:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:23,592 INFO L225 Difference]: With dead ends: 262 [2020-09-21 10:30:23,593 INFO L226 Difference]: Without dead ends: 139 [2020-09-21 10:30:23,600 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 10:30:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-21 10:30:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2020-09-21 10:30:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-21 10:30:23,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2020-09-21 10:30:23,682 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 38 [2020-09-21 10:30:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:23,683 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2020-09-21 10:30:23,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:30:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2020-09-21 10:30:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 10:30:23,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:23,690 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] [2020-09-21 10:30:23,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:30:23,691 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash -503826635, now seen corresponding path program 1 times [2020-09-21 10:30:23,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:23,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680849696] [2020-09-21 10:30:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:23,902 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 10:30:23,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:23,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:30:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:24,047 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 10:30:24,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680849696] [2020-09-21 10:30:24,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:24,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:30:24,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716961231] [2020-09-21 10:30:24,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:30:24,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:30:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:30:24,063 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 6 states. [2020-09-21 10:30:24,189 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:25,302 INFO L93 Difference]: Finished difference Result 263 states and 379 transitions. [2020-09-21 10:30:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:30:25,303 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-09-21 10:30:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:25,307 INFO L225 Difference]: With dead ends: 263 [2020-09-21 10:30:25,307 INFO L226 Difference]: Without dead ends: 160 [2020-09-21 10:30:25,309 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 10:30:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-21 10:30:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-09-21 10:30:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-21 10:30:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2020-09-21 10:30:25,346 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 40 [2020-09-21 10:30:25,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:25,347 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2020-09-21 10:30:25,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:30:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2020-09-21 10:30:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 10:30:25,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:25,355 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] [2020-09-21 10:30:25,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:30:25,355 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:25,357 INFO L82 PathProgramCache]: Analyzing trace with hash -16428909, now seen corresponding path program 2 times [2020-09-21 10:30:25,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:25,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55836858] [2020-09-21 10:30:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:25,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:25,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:25,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:30:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:25,774 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 10:30:25,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55836858] [2020-09-21 10:30:25,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:25,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:30:25,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539853912] [2020-09-21 10:30:25,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:30:25,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:30:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:30:25,779 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand 7 states. [2020-09-21 10:30:25,896 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:27,210 INFO L93 Difference]: Finished difference Result 284 states and 412 transitions. [2020-09-21 10:30:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:30:27,212 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-21 10:30:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:27,218 INFO L225 Difference]: With dead ends: 284 [2020-09-21 10:30:27,218 INFO L226 Difference]: Without dead ends: 181 [2020-09-21 10:30:27,220 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 10:30:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-21 10:30:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 123. [2020-09-21 10:30:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-21 10:30:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2020-09-21 10:30:27,263 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 42 [2020-09-21 10:30:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:27,263 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2020-09-21 10:30:27,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:30:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2020-09-21 10:30:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 10:30:27,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:27,265 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] [2020-09-21 10:30:27,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:30:27,268 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:27,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash 221350513, now seen corresponding path program 3 times [2020-09-21 10:30:27,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:27,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095617373] [2020-09-21 10:30:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,492 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-09-21 10:30:27,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 10:30:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:30:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:27,653 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 10:30:27,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095617373] [2020-09-21 10:30:27,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:27,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:30:27,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147071535] [2020-09-21 10:30:27,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:30:27,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:30:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:30:27,656 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand 8 states. [2020-09-21 10:30:27,771 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-21 10:30:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:31,678 INFO L93 Difference]: Finished difference Result 306 states and 446 transitions. [2020-09-21 10:30:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:30:31,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-09-21 10:30:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:31,681 INFO L225 Difference]: With dead ends: 306 [2020-09-21 10:30:31,681 INFO L226 Difference]: Without dead ends: 203 [2020-09-21 10:30:31,682 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 10:30:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-21 10:30:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 125. [2020-09-21 10:30:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-21 10:30:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2020-09-21 10:30:31,703 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 44 [2020-09-21 10:30:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:31,703 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2020-09-21 10:30:31,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:30:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2020-09-21 10:30:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 10:30:31,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:31,705 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] [2020-09-21 10:30:31,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:30:31,705 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1094108367, now seen corresponding path program 4 times [2020-09-21 10:30:31,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:31,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594356873] [2020-09-21 10:30:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:31,746 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-21 10:30:31,746 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-21 10:30:31,746 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:30:31,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:30:31,777 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-21 10:30:31,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:30:31 BoogieIcfgContainer [2020-09-21 10:30:31,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:30:31,780 INFO L168 Benchmark]: Toolchain (without parser) took 12502.30 ms. Allocated memory was 146.3 MB in the beginning and 318.2 MB in the end (delta: 172.0 MB). Free memory was 102.4 MB in the beginning and 220.2 MB in the end (delta: -117.9 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:31,781 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-21 10:30:31,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.23 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.7 MB in the beginning and 173.5 MB in the end (delta: -71.7 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:31,783 INFO L168 Benchmark]: Boogie Preprocessor took 125.80 ms. Allocated memory is still 203.4 MB. Free memory was 173.5 MB in the beginning and 169.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:31,784 INFO L168 Benchmark]: RCFGBuilder took 1074.84 ms. Allocated memory is still 203.4 MB. Free memory was 169.3 MB in the beginning and 106.9 MB in the end (delta: 62.4 MB). Peak memory consumption was 62.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:31,785 INFO L168 Benchmark]: TraceAbstraction took 10620.45 ms. Allocated memory was 203.4 MB in the beginning and 318.2 MB in the end (delta: 114.8 MB). Free memory was 106.2 MB in the beginning and 220.2 MB in the end (delta: -114.0 MB). Peak memory consumption was 813.6 kB. Max. memory is 7.1 GB. [2020-09-21 10:30:31,789 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 667.23 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.7 MB in the beginning and 173.5 MB in the end (delta: -71.7 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.80 ms. Allocated memory is still 203.4 MB. Free memory was 173.5 MB in the beginning and 169.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1074.84 ms. Allocated memory is still 203.4 MB. Free memory was 169.3 MB in the beginning and 106.9 MB in the end (delta: 62.4 MB). Peak memory consumption was 62.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10620.45 ms. Allocated memory was 203.4 MB in the beginning and 318.2 MB in the end (delta: 114.8 MB). Free memory was 106.2 MB in the beginning and 220.2 MB in the end (delta: -114.0 MB). Peak memory consumption was 813.6 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 487]: 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: [L204] unsigned int Id_MCDC_122; [L205] UINT16 Id_MCDC_123; [L206] UINT16 Id_MCDC_124; [L207] Od_IndexTable* Id_MCDC_125; [L208] Od_IndexTable* Id_MCDC_126; [L209] Od_IndexTable* Id_MCDC_127; [L210] Od_IndexTable* Id_MCDC_128; [L211] Od_IndexTable* Id_MCDC_129; [L212] UINT32 Id_MCDC_130 [4]; [L213] CanOpenNode Id_MCDC_131; [L214] UINT32 Id_MCDC_132=0; [L452] void * Id_MCDC_161; [L453] void * Id_MCDC_162; [L454] void * Id_MCDC_163; [L455] void * Id_MCDC_164; [L456] void * Id_MCDC_165; [L457] void * Id_MCDC_166; [L458] int Id_MCDC_167; [L459] int Id_MCDC_168; [L460] int Id_MCDC_169; [L461] int Id_MCDC_170; [L462] int Id_MCDC_171; [L463] int Id_MCDC_172; [L464] int Id_MCDC_173; [L465] short Id_MCDC_174; [L466] short Id_MCDC_175; [L467] FILE* Id_MCDC_176; [L468] unsigned short Id_MCDC_177; [L469] unsigned short Id_MCDC_178; [L470] unsigned short Id_MCDC_179=0; [L471] unsigned short Id_MCDC_180=0; [L472] char Id_MCDC_181; [L473] char Id_MCDC_182; [L474] POS_CTRL_MODE Id_MCDC_183; [L475] Id_MCDC_176 = fopen("in.eds", "r") [L476] COND FALSE !(Id_MCDC_176 == (( void * ) 0)) [L481] CALL Id_MCDC_118() [L445] int Id_MCDC_159; [L446] void * Id_MCDC_160; [L447] CALL Id_MCDC_117() [L425] CHAR Id_MCDC_157 [4]={0, 0, 0, 0}; [L426] UINT32 Id_MCDC_158=0; [L427] Id_MCDC_131.Id_MCDC_66 = ( PDO_Buffer* ) malloc(372) [L428] CALL Id_MCDC_115() [L356] UINT32 Id_MCDC_141; [L357] UINT32 Id_MCDC_142; [L358] UINT32 Id_MCDC_143; [L359] UINT32 Id_MCDC_144; [L360] UINT32 Id_MCDC_145; [L361] UINT32 Id_MCDC_146=0x00; [L362] UINT16 Id_MCDC_147; [L363] UINT32 Id_MCDC_148=0x00; [L364] UINT32 Id_MCDC_149=0x00; [L365] UINT8 Id_MCDC_35=0; [L366] UINT8 Id_MCDC_150=0; [L367] UINT8 Id_MCDC_36=0; [L368] UINT8 Id_MCDC_151=0; [L369] UINT8 Id_MCDC_152=0x00; [L370] INT32 Id_MCDC_153; [L371] void * Id_MCDC_154; [L372] UINT32* Id_MCDC_155; [L373] UINT16 Id_MCDC_156; [L374] Id_MCDC_141 = 0x1800 [L375] Id_MCDC_150 = 0 [L375] COND TRUE Id_MCDC_150 < 4 [L377] Id_MCDC_130[Id_MCDC_150] = 0x1A00 + Id_MCDC_150 [L375] Id_MCDC_150++ [L375] COND TRUE Id_MCDC_150 < 4 [L377] Id_MCDC_130[Id_MCDC_150] = 0x1A00 + Id_MCDC_150 [L375] Id_MCDC_150++ [L375] COND TRUE Id_MCDC_150 < 4 [L377] Id_MCDC_130[Id_MCDC_150] = 0x1A00 + Id_MCDC_150 [L375] Id_MCDC_150++ [L375] COND TRUE Id_MCDC_150 < 4 [L377] Id_MCDC_130[Id_MCDC_150] = 0x1A00 + Id_MCDC_150 [L375] Id_MCDC_150++ [L375] COND FALSE !(Id_MCDC_150 < 4) [L379] COND FALSE !(Id_MCDC_141 <= 0x1803) [L421] return 0x00; [L361] UINT32 Id_MCDC_146=0x00; [L421] return 0x00; [L363] UINT32 Id_MCDC_148=0x00; [L421] return 0x00; [L364] UINT32 Id_MCDC_149=0x00; [L421] return 0x00; [L421] return 0x00; [L421] return 0x00; [L428] RET Id_MCDC_115() [L429] Id_MCDC_158 = 0 [L429] COND FALSE !(Id_MCDC_158 < 4) [L440] CALL Id_MCDC_113(4, Id_MCDC_157) [L305] UINT32 Id_MCDC_139=0; [L306] UINT32 Id_MCDC_140=0; [L307] COND FALSE !(Id_MCDC_111 < 2) [L311] COND FALSE !(Id_MCDC_111 != 2) [L317] EXPR Id_MCDC_112[1] [L317] Id_MCDC_140 = Id_MCDC_112[1] [L319] EXPR Id_MCDC_112[0] [L319] CALL Id_MCDC_110(Id_MCDC_112[0], Id_MCDC_140) [L274] UINT32 Id_MCDC_135=0; [L275] UINT32 Id_MCDC_136=0; [L276] UINT32 Id_MCDC_137=1; [L277] UINT32 Id_MCDC_138=0; [L278] COND TRUE Id_MCDC_108 > Id_MCDC_109 [L280] Id_MCDC_135 = Id_MCDC_108 [L281] Id_MCDC_136 = Id_MCDC_109 [L293] COND TRUE Id_MCDC_137 != 0 [L295] CALL avoid_zero(Id_MCDC_136 != 0) [L9] COND FALSE !(!y) [L295] RET avoid_zero(Id_MCDC_136 != 0) [L296] CALL __VERIFIER_assert(( long long ) (Id_MCDC_135 / Id_MCDC_136) >= 0 && ( long long ) (Id_MCDC_135 / Id_MCDC_136) <= 4294967295) [L485] COND TRUE ! (Id_MCDC_121) [L487] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 131 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 10.4s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 701 SDtfs, 984 SDslu, 855 SDs, 0 SdLazy, 1932 SolverSat, 218 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 6.6s 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=127occurred 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, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 29420 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...