/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:55:09,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:55:09,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:55:09,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:55:09,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:55:09,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:55:09,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:55:09,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:55:09,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:55:09,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:55:09,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:55:09,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:55:09,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:55:09,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:55:09,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:55:09,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:55:09,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:55:09,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:55:09,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:55:09,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:55:09,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:55:09,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:55:09,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:55:09,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:55:09,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:55:09,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:55:09,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:55:09,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:55:09,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:55:09,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:55:09,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:55:09,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:55:09,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:55:09,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:55:09,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:55:09,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:55:09,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:55:09,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:55:09,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:55:09,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:55:09,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:55:09,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:55:09,305 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:55:09,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:55:09,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:55:09,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:55:09,314 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:55:09,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:55:09,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:55:09,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:55:09,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:55:09,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:55:09,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:55:09,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:55:09,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:55:09,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:55:09,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:55:09,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:55:09,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:55:09,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:55:09,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:55:09,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:55:09,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:55:09,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:55:09,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:55:09,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:55:09,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:55:09,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:55:09,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:55:09,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:55:09,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:55:09,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:55:09,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:55:09,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:55:09,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:55:09,703 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:55:09,704 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:55:09,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 23:55:09,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56e6e505c/42628b37cdb34d56844d07437ea8b8f8/FLAG48774f5ae [2020-08-21 23:55:10,232 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:55:10,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 23:55:10,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56e6e505c/42628b37cdb34d56844d07437ea8b8f8/FLAG48774f5ae [2020-08-21 23:55:10,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56e6e505c/42628b37cdb34d56844d07437ea8b8f8 [2020-08-21 23:55:10,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:55:10,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:55:10,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:55:10,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:55:10,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:55:10,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:55:10" (1/1) ... [2020-08-21 23:55:10,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ab6a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:10, skipping insertion in model container [2020-08-21 23:55:10,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:55:10" (1/1) ... [2020-08-21 23:55:10,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:55:10,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:55:10,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:55:11,006 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:55:11,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:55:11,244 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:55:11,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11 WrapperNode [2020-08-21 23:55:11,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:55:11,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:55:11,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:55:11,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:55:11,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... [2020-08-21 23:55:11,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... [2020-08-21 23:55:11,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... [2020-08-21 23:55:11,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... [2020-08-21 23:55:11,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... [2020-08-21 23:55:11,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... [2020-08-21 23:55:11,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... [2020-08-21 23:55:11,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:55:11,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:55:11,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:55:11,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:55:11,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:55:11,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:55:11,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:55:11,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 23:55:11,409 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-21 23:55:11,409 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-21 23:55:11,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:55:11,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:55:11,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:55:11,410 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-21 23:55:11,410 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-21 23:55:11,410 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-21 23:55:11,410 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-21 23:55:11,410 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-21 23:55:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-21 23:55:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-21 23:55:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-21 23:55:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-21 23:55:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-21 23:55:11,411 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-21 23:55:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-21 23:55:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-21 23:55:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 23:55:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-21 23:55:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-21 23:55:11,412 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-21 23:55:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-21 23:55:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-21 23:55:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-21 23:55:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-21 23:55:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-21 23:55:11,413 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-21 23:55:11,414 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-21 23:55:11,414 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-21 23:55:11,414 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-21 23:55:11,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:55:11,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:55:11,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:55:11,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:55:11,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:55:11,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:55:11,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:55:11,880 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:55:11,880 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 23:55:11,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:55:11 BoogieIcfgContainer [2020-08-21 23:55:11,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:55:11,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:55:11,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:55:11,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:55:11,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:55:10" (1/3) ... [2020-08-21 23:55:11,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5371cf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:55:11, skipping insertion in model container [2020-08-21 23:55:11,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:55:11" (2/3) ... [2020-08-21 23:55:11,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5371cf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:55:11, skipping insertion in model container [2020-08-21 23:55:11,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:55:11" (3/3) ... [2020-08-21 23:55:11,894 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 23:55:11,905 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:55:11,912 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:55:11,927 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:55:11,954 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:55:11,954 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:55:11,954 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:55:11,955 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:55:11,955 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:55:11,955 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:55:11,955 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:55:11,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:55:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-21 23:55:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 23:55:11,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:11,988 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] [2020-08-21 23:55:11,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-08-21 23:55:12,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:12,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175647343] [2020-08-21 23:55:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:12,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:12,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:55:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:12,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175647343] [2020-08-21 23:55:12,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:12,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:55:12,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118489931] [2020-08-21 23:55:12,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:55:12,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:55:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:55:12,290 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-08-21 23:55:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:12,499 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-08-21 23:55:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:55:12,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 23:55:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:12,511 INFO L225 Difference]: With dead ends: 93 [2020-08-21 23:55:12,511 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 23:55:12,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:55:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 23:55:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 23:55:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 23:55:12,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-08-21 23:55:12,560 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-08-21 23:55:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:12,560 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-08-21 23:55:12,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:55:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-08-21 23:55:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:55:12,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:12,562 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] [2020-08-21 23:55:12,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:55:12,563 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-08-21 23:55:12,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:12,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196905188] [2020-08-21 23:55:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:12,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:55:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:12,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196905188] [2020-08-21 23:55:12,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:12,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:55:12,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128809674] [2020-08-21 23:55:12,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:55:12,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:12,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:55:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:55:12,656 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-08-21 23:55:12,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:12,816 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-08-21 23:55:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:55:12,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-21 23:55:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:12,819 INFO L225 Difference]: With dead ends: 78 [2020-08-21 23:55:12,819 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 23:55:12,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:55:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 23:55:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-21 23:55:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 23:55:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-21 23:55:12,831 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-08-21 23:55:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:12,831 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-21 23:55:12,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:55:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-21 23:55:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:55:12,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:12,834 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] [2020-08-21 23:55:12,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:55:12,834 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-08-21 23:55:12,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:12,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778046772] [2020-08-21 23:55:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:55:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:13,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778046772] [2020-08-21 23:55:13,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:13,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:55:13,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540919341] [2020-08-21 23:55:13,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:55:13,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:55:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:55:13,035 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-08-21 23:55:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:13,400 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-08-21 23:55:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:55:13,401 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-21 23:55:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:13,406 INFO L225 Difference]: With dead ends: 140 [2020-08-21 23:55:13,406 INFO L226 Difference]: Without dead ends: 91 [2020-08-21 23:55:13,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:55:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-21 23:55:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-08-21 23:55:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 23:55:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-08-21 23:55:13,425 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-08-21 23:55:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:13,425 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-08-21 23:55:13,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:55:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-08-21 23:55:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:55:13,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:13,427 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] [2020-08-21 23:55:13,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:55:13,428 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:13,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-08-21 23:55:13,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:13,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554750992] [2020-08-21 23:55:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:55:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:13,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554750992] [2020-08-21 23:55:13,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:13,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:55:13,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153743850] [2020-08-21 23:55:13,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:55:13,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:55:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:55:13,570 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-08-21 23:55:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:13,817 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-08-21 23:55:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 23:55:13,819 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-21 23:55:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:13,821 INFO L225 Difference]: With dead ends: 136 [2020-08-21 23:55:13,821 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 23:55:13,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:55:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 23:55:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-08-21 23:55:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 23:55:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-08-21 23:55:13,847 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-08-21 23:55:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:13,848 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-08-21 23:55:13,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:55:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-08-21 23:55:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:55:13,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:13,850 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] [2020-08-21 23:55:13,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:55:13,850 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-08-21 23:55:13,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:13,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286025246] [2020-08-21 23:55:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:55:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:13,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286025246] [2020-08-21 23:55:13,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:13,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:55:13,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739943191] [2020-08-21 23:55:13,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:55:13,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:13,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:55:13,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:55:13,942 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-08-21 23:55:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:14,154 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-08-21 23:55:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 23:55:14,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 23:55:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:14,156 INFO L225 Difference]: With dead ends: 138 [2020-08-21 23:55:14,157 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 23:55:14,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:55:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 23:55:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-08-21 23:55:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 23:55:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-08-21 23:55:14,167 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-08-21 23:55:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:14,167 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-08-21 23:55:14,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:55:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-08-21 23:55:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 23:55:14,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:14,169 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] [2020-08-21 23:55:14,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:55:14,170 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:14,170 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-08-21 23:55:14,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:14,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787626774] [2020-08-21 23:55:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 23:55:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:14,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787626774] [2020-08-21 23:55:14,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:14,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:55:14,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807767512] [2020-08-21 23:55:14,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:55:14,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:55:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:55:14,257 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-08-21 23:55:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:14,364 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-08-21 23:55:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:55:14,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-21 23:55:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:14,366 INFO L225 Difference]: With dead ends: 124 [2020-08-21 23:55:14,367 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 23:55:14,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:55:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 23:55:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-08-21 23:55:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 23:55:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-21 23:55:14,376 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-08-21 23:55:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:14,376 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-21 23:55:14,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:55:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-21 23:55:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 23:55:14,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:14,378 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] [2020-08-21 23:55:14,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:55:14,378 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-08-21 23:55:14,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:14,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622487726] [2020-08-21 23:55:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 23:55:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:14,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622487726] [2020-08-21 23:55:14,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:14,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:55:14,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458440727] [2020-08-21 23:55:14,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:55:14,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:14,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:55:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:55:14,446 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-08-21 23:55:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:14,599 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-08-21 23:55:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 23:55:14,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-21 23:55:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:14,601 INFO L225 Difference]: With dead ends: 147 [2020-08-21 23:55:14,602 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 23:55:14,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:55:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 23:55:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-21 23:55:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 23:55:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-08-21 23:55:14,611 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-08-21 23:55:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:14,611 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-08-21 23:55:14,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:55:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-08-21 23:55:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 23:55:14,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:14,614 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 23:55:14,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:55:14,614 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:14,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-08-21 23:55:14,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:14,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182739910] [2020-08-21 23:55:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 23:55:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 23:55:14,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182739910] [2020-08-21 23:55:14,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:55:14,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:55:14,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300747336] [2020-08-21 23:55:14,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:55:14,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:14,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:55:14,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:55:14,775 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-08-21 23:55:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:15,037 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-08-21 23:55:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:55:15,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-21 23:55:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:15,039 INFO L225 Difference]: With dead ends: 107 [2020-08-21 23:55:15,039 INFO L226 Difference]: Without dead ends: 105 [2020-08-21 23:55:15,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:55:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-21 23:55:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-08-21 23:55:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 23:55:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-08-21 23:55:15,048 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-08-21 23:55:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:15,049 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-08-21 23:55:15,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:55:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-08-21 23:55:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 23:55:15,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:15,051 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 23:55:15,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:55:15,052 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-08-21 23:55:15,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:15,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284077315] [2020-08-21 23:55:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:15,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 23:55:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:15,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284077315] [2020-08-21 23:55:15,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:15,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 23:55:15,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204172322] [2020-08-21 23:55:15,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:55:15,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:55:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:55:15,126 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-08-21 23:55:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:15,339 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-08-21 23:55:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:55:15,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 23:55:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:15,343 INFO L225 Difference]: With dead ends: 209 [2020-08-21 23:55:15,343 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 23:55:15,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:55:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 23:55:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-08-21 23:55:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-21 23:55:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-08-21 23:55:15,354 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-08-21 23:55:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:15,355 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-08-21 23:55:15,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:55:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-08-21 23:55:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:55:15,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:15,357 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2020-08-21 23:55:15,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:55:15,357 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-08-21 23:55:15,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:15,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624207942] [2020-08-21 23:55:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:15,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:15,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 23:55:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:15,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624207942] [2020-08-21 23:55:15,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:15,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 23:55:15,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946562076] [2020-08-21 23:55:15,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:55:15,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:15,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:55:15,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:55:15,537 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-08-21 23:55:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:16,089 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-08-21 23:55:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:55:16,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-08-21 23:55:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:16,091 INFO L225 Difference]: With dead ends: 240 [2020-08-21 23:55:16,092 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 23:55:16,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:55:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 23:55:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-08-21 23:55:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 23:55:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-08-21 23:55:16,104 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-08-21 23:55:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:16,105 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-08-21 23:55:16,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:55:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-08-21 23:55:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:55:16,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:16,106 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2020-08-21 23:55:16,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:55:16,107 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-08-21 23:55:16,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:16,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251827665] [2020-08-21 23:55:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:16,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:55:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 23:55:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:55:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:55:16,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251827665] [2020-08-21 23:55:16,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:55:16,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:55:16,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813433700] [2020-08-21 23:55:16,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:55:16,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:55:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:55:16,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:55:16,237 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 11 states. [2020-08-21 23:55:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:55:16,640 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-21 23:55:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:55:16,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 23:55:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:55:16,642 INFO L225 Difference]: With dead ends: 202 [2020-08-21 23:55:16,643 INFO L226 Difference]: Without dead ends: 200 [2020-08-21 23:55:16,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:55:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-21 23:55:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-08-21 23:55:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 23:55:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-08-21 23:55:16,654 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-08-21 23:55:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:55:16,655 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-08-21 23:55:16,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:55:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-08-21 23:55:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:55:16,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:55:16,657 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2020-08-21 23:55:16,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:55:16,658 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:55:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:55:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-08-21 23:55:16,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:55:16,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946057454] [2020-08-21 23:55:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:55:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:55:16,678 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:55:16,678 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:55:16,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:55:16,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:55:16 BoogieIcfgContainer [2020-08-21 23:55:16,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:55:16,706 INFO L168 Benchmark]: Toolchain (without parser) took 6048.42 ms. Allocated memory was 147.3 MB in the beginning and 270.0 MB in the end (delta: 122.7 MB). Free memory was 102.7 MB in the beginning and 100.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 124.9 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:16,707 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:55:16,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.41 ms. Allocated memory was 147.3 MB in the beginning and 206.6 MB in the end (delta: 59.2 MB). Free memory was 102.5 MB in the beginning and 182.8 MB in the end (delta: -80.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:16,709 INFO L168 Benchmark]: Boogie Preprocessor took 87.89 ms. Allocated memory is still 206.6 MB. Free memory was 182.8 MB in the beginning and 180.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:16,710 INFO L168 Benchmark]: RCFGBuilder took 551.16 ms. Allocated memory is still 206.6 MB. Free memory was 180.2 MB in the beginning and 153.1 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:16,711 INFO L168 Benchmark]: TraceAbstraction took 4816.63 ms. Allocated memory was 206.6 MB in the beginning and 270.0 MB in the end (delta: 63.4 MB). Free memory was 152.4 MB in the beginning and 100.5 MB in the end (delta: 52.0 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. [2020-08-21 23:55:16,714 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 587.41 ms. Allocated memory was 147.3 MB in the beginning and 206.6 MB in the end (delta: 59.2 MB). Free memory was 102.5 MB in the beginning and 182.8 MB in the end (delta: -80.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.89 ms. Allocated memory is still 206.6 MB. Free memory was 182.8 MB in the beginning and 180.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 551.16 ms. Allocated memory is still 206.6 MB. Free memory was 180.2 MB in the beginning and 153.1 MB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4816.63 ms. Allocated memory was 206.6 MB in the beginning and 270.0 MB in the end (delta: 63.4 MB). Free memory was 152.4 MB in the beginning and 100.5 MB in the end (delta: 52.0 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 901 SDslu, 1287 SDs, 0 SdLazy, 1834 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=11, 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, 11 MinimizatonAttempts, 209 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 444 NumberOfCodeBlocks, 444 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 45573 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 2/22 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 proved your program to be incorrect! Received shutdown request...