/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=0.2 --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 23:06:41,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:06:41,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:06:41,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:06:41,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:06:41,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:06:41,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:06:41,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:06:41,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:06:41,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:06:41,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:06:41,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:06:41,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:06:41,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:06:41,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:06:41,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:06:41,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:06:41,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:06:41,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:06:41,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:06:41,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:06:41,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:06:41,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:06:41,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:06:41,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:06:41,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:06:41,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:06:41,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:06:41,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:06:41,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:06:41,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:06:41,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:06:41,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:06:41,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:06:41,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:06:41,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:06:41,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:06:41,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:06:41,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:06:41,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:06:41,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:06:41,496 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 23:06:41,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:06:41,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:06:41,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:06:41,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:06:41,527 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:06:41,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:06:41,528 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:06:41,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:06:41,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:06:41,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:06:41,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:06:41,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:06:41,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:06:41,529 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:06:41,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:06:41,529 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:06:41,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:06:41,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:06:41,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:06:41,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:06:41,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:06:41,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:06:41,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:06:41,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:06:41,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:06:41,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:06:41,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:06:41,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:06:41,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:06:41,532 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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-08-21 23:06:41,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:06:41,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:06:41,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:06:41,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:06:41,892 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:06:41,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 23:06:41,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/401fe3b18/b9e6965c780448cab44ee5cf0fe0124f/FLAG6ebc9227e [2020-08-21 23:06:42,381 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:06:42,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 23:06:42,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/401fe3b18/b9e6965c780448cab44ee5cf0fe0124f/FLAG6ebc9227e [2020-08-21 23:06:42,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/401fe3b18/b9e6965c780448cab44ee5cf0fe0124f [2020-08-21 23:06:42,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:06:42,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:06:42,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:06:42,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:06:42,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:06:42,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:06:42" (1/1) ... [2020-08-21 23:06:42,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be97408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:42, skipping insertion in model container [2020-08-21 23:06:42,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:06:42" (1/1) ... [2020-08-21 23:06:42,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:06:42,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:06:43,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:06:43,075 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:06:43,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:06:43,232 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:06:43,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43 WrapperNode [2020-08-21 23:06:43,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:06:43,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:06:43,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:06:43,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:06:43,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (1/1) ... [2020-08-21 23:06:43,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (1/1) ... [2020-08-21 23:06:43,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (1/1) ... [2020-08-21 23:06:43,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (1/1) ... [2020-08-21 23:06:43,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (1/1) ... [2020-08-21 23:06:43,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (1/1) ... [2020-08-21 23:06:43,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (1/1) ... [2020-08-21 23:06:43,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:06:43,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:06:43,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:06:43,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:06:43,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (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 23:06:43,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:06:43,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:06:43,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 23:06:43,356 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-21 23:06:43,356 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-21 23:06:43,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:06:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:06:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:06:43,357 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-21 23:06:43,358 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-21 23:06:43,358 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-21 23:06:43,359 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-21 23:06:43,359 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-21 23:06:43,359 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-21 23:06:43,359 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-21 23:06:43,360 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-21 23:06:43,360 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-21 23:06:43,360 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-21 23:06:43,360 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-21 23:06:43,361 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-21 23:06:43,361 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-21 23:06:43,361 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 23:06:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-21 23:06:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-21 23:06:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-21 23:06:43,364 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-21 23:06:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-21 23:06:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-21 23:06:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-21 23:06:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-21 23:06:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-21 23:06:43,365 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-21 23:06:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-21 23:06:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-21 23:06:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:06:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:06:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 23:06:43,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 23:06:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:06:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:06:43,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:06:43,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:06:43,806 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 23:06:43,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:06:43 BoogieIcfgContainer [2020-08-21 23:06:43,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:06:43,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:06:43,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:06:43,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:06:43,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:06:42" (1/3) ... [2020-08-21 23:06:43,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792e5a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:06:43, skipping insertion in model container [2020-08-21 23:06:43,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:06:43" (2/3) ... [2020-08-21 23:06:43,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792e5a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:06:43, skipping insertion in model container [2020-08-21 23:06:43,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:06:43" (3/3) ... [2020-08-21 23:06:43,818 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 23:06:43,827 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:06:43,835 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:06:43,847 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:06:43,872 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:06:43,872 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:06:43,872 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:06:43,872 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:06:43,873 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:06:43,873 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:06:43,873 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:06:43,873 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:06:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-21 23:06:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 23:06:43,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:43,900 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 23:06:43,901 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-08-21 23:06:43,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:43,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507004369] [2020-08-21 23:06:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:06:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,153 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 23:06:44,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507004369] [2020-08-21 23:06:44,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:44,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:06:44,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473649362] [2020-08-21 23:06:44,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:06:44,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:44,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:06:44,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:06:44,175 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-08-21 23:06:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:44,360 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-08-21 23:06:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:06:44,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 23:06:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:44,371 INFO L225 Difference]: With dead ends: 93 [2020-08-21 23:06:44,372 INFO L226 Difference]: Without dead ends: 43 [2020-08-21 23:06:44,376 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 23:06:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-21 23:06:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-21 23:06:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 23:06:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-08-21 23:06:44,421 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-08-21 23:06:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:44,422 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-08-21 23:06:44,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:06:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-08-21 23:06:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:06:44,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:44,424 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 23:06:44,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:06:44,425 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:44,425 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-08-21 23:06:44,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:44,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436518488] [2020-08-21 23:06:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:06:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,524 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 23:06:44,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436518488] [2020-08-21 23:06:44,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:44,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:06:44,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657769217] [2020-08-21 23:06:44,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:06:44,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:44,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:06:44,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:06:44,529 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-08-21 23:06:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:44,682 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-08-21 23:06:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:06:44,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-21 23:06:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:44,685 INFO L225 Difference]: With dead ends: 78 [2020-08-21 23:06:44,685 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 23:06:44,687 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 23:06:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 23:06:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-21 23:06:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 23:06:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-21 23:06:44,697 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-08-21 23:06:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:44,697 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-21 23:06:44,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:06:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-21 23:06:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:06:44,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:44,699 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 23:06:44,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:06:44,700 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-08-21 23:06:44,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:44,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709605641] [2020-08-21 23:06:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:06:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:44,856 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 23:06:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709605641] [2020-08-21 23:06:44,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:44,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:06:44,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837297288] [2020-08-21 23:06:44,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:06:44,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:06:44,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:06:44,859 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-08-21 23:06:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:45,239 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-08-21 23:06:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:06:45,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-21 23:06:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:45,245 INFO L225 Difference]: With dead ends: 140 [2020-08-21 23:06:45,246 INFO L226 Difference]: Without dead ends: 91 [2020-08-21 23:06:45,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:06:45,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-21 23:06:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-08-21 23:06:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 23:06:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-08-21 23:06:45,290 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-08-21 23:06:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:45,292 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-08-21 23:06:45,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:06:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-08-21 23:06:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:06:45,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:45,296 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 23:06:45,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:06:45,297 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-08-21 23:06:45,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:45,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41429376] [2020-08-21 23:06:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:45,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:06:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:45,480 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 23:06:45,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41429376] [2020-08-21 23:06:45,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:45,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:06:45,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464916] [2020-08-21 23:06:45,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:06:45,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:06:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:06:45,483 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-08-21 23:06:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:45,722 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-08-21 23:06:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 23:06:45,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-21 23:06:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:45,725 INFO L225 Difference]: With dead ends: 136 [2020-08-21 23:06:45,726 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 23:06:45,727 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 23:06:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 23:06:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-08-21 23:06:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 23:06:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-08-21 23:06:45,739 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-08-21 23:06:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:45,740 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-08-21 23:06:45,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:06:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-08-21 23:06:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 23:06:45,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:45,742 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 23:06:45,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:06:45,742 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-08-21 23:06:45,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:45,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544881268] [2020-08-21 23:06:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:45,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:45,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 23:06:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:45,822 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 23:06:45,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544881268] [2020-08-21 23:06:45,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:45,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 23:06:45,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157510617] [2020-08-21 23:06:45,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 23:06:45,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:45,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 23:06:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 23:06:45,825 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-08-21 23:06:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:46,013 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-08-21 23:06:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 23:06:46,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 23:06:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:46,015 INFO L225 Difference]: With dead ends: 138 [2020-08-21 23:06:46,015 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 23:06:46,017 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 23:06:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 23:06:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-08-21 23:06:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 23:06:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-08-21 23:06:46,030 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-08-21 23:06:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:46,030 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-08-21 23:06:46,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 23:06:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-08-21 23:06:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 23:06:46,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:46,032 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 23:06:46,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:06:46,032 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:46,032 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-08-21 23:06:46,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:46,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279369909] [2020-08-21 23:06:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 23:06:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,113 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 23:06:46,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279369909] [2020-08-21 23:06:46,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:46,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 23:06:46,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888305903] [2020-08-21 23:06:46,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 23:06:46,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 23:06:46,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:06:46,117 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-08-21 23:06:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:46,234 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-08-21 23:06:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 23:06:46,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-21 23:06:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:46,237 INFO L225 Difference]: With dead ends: 124 [2020-08-21 23:06:46,237 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 23:06:46,237 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 23:06:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 23:06:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-08-21 23:06:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 23:06:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-21 23:06:46,250 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-08-21 23:06:46,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:46,250 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-21 23:06:46,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 23:06:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-21 23:06:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 23:06:46,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:46,253 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 23:06:46,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:06:46,253 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:46,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-08-21 23:06:46,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:46,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051385567] [2020-08-21 23:06:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 23:06:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,339 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 23:06:46,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051385567] [2020-08-21 23:06:46,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:46,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:06:46,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221960855] [2020-08-21 23:06:46,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:06:46,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:06:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:06:46,342 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-08-21 23:06:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:46,498 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-08-21 23:06:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 23:06:46,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-21 23:06:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:46,500 INFO L225 Difference]: With dead ends: 147 [2020-08-21 23:06:46,500 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 23:06:46,501 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 23:06:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 23:06:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-21 23:06:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 23:06:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-08-21 23:06:46,509 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-08-21 23:06:46,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:46,510 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-08-21 23:06:46,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:06:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-08-21 23:06:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 23:06:46,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:46,511 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 23:06:46,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:06:46,512 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:46,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-08-21 23:06:46,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:46,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53640100] [2020-08-21 23:06:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 23:06:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:46,612 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 23:06:46,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53640100] [2020-08-21 23:06:46,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:06:46,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 23:06:46,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228215844] [2020-08-21 23:06:46,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:06:46,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:46,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:06:46,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:06:46,614 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-08-21 23:06:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:46,870 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-08-21 23:06:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:06:46,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-21 23:06:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:46,878 INFO L225 Difference]: With dead ends: 107 [2020-08-21 23:06:46,878 INFO L226 Difference]: Without dead ends: 105 [2020-08-21 23:06:46,879 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 23:06:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-21 23:06:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-08-21 23:06:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 23:06:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-08-21 23:06:46,897 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-08-21 23:06:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:46,897 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-08-21 23:06:46,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:06:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-08-21 23:06:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 23:06:46,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:46,902 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 23:06:46,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:06:46,902 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-08-21 23:06:46,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:46,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317332943] [2020-08-21 23:06:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:47,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:47,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 23:06:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:47,011 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 23:06:47,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317332943] [2020-08-21 23:06:47,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:06:47,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 23:06:47,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163369148] [2020-08-21 23:06:47,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 23:06:47,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 23:06:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 23:06:47,014 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-08-21 23:06:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:47,219 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-08-21 23:06:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:06:47,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 23:06:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:47,223 INFO L225 Difference]: With dead ends: 209 [2020-08-21 23:06:47,223 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 23:06:47,224 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 23:06:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 23:06:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-08-21 23:06:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-21 23:06:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-08-21 23:06:47,234 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-08-21 23:06:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:47,234 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-08-21 23:06:47,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 23:06:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-08-21 23:06:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:06:47,236 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:47,236 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 23:06:47,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:06:47,237 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-08-21 23:06:47,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:47,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361289122] [2020-08-21 23:06:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:47,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 23:06:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:47,392 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 23:06:47,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361289122] [2020-08-21 23:06:47,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:06:47,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 23:06:47,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748250518] [2020-08-21 23:06:47,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 23:06:47,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 23:06:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-21 23:06:47,395 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-08-21 23:06:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:47,957 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-08-21 23:06:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:06:47,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-08-21 23:06:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:47,960 INFO L225 Difference]: With dead ends: 240 [2020-08-21 23:06:47,960 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 23:06:47,962 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 23:06:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 23:06:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-08-21 23:06:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-21 23:06:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-08-21 23:06:47,978 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-08-21 23:06:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:47,980 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-08-21 23:06:47,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 23:06:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-08-21 23:06:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:06:47,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:47,984 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 23:06:47,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:06:47,984 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-08-21 23:06:47,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:47,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645730122] [2020-08-21 23:06:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:48,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:06:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:48,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 23:06:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:06:48,146 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 23:06:48,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645730122] [2020-08-21 23:06:48,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:06:48,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:06:48,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137119444] [2020-08-21 23:06:48,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:06:48,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:06:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:06:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:06:48,149 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 11 states. [2020-08-21 23:06:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:06:48,542 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-21 23:06:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:06:48,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 23:06:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:06:48,545 INFO L225 Difference]: With dead ends: 202 [2020-08-21 23:06:48,546 INFO L226 Difference]: Without dead ends: 200 [2020-08-21 23:06:48,547 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 23:06:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-21 23:06:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-08-21 23:06:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-21 23:06:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-08-21 23:06:48,558 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-08-21 23:06:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:06:48,559 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-08-21 23:06:48,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:06:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-08-21 23:06:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 23:06:48,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:06:48,566 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 23:06:48,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:06:48,567 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:06:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:06:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-08-21 23:06:48,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:06:48,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535220592] [2020-08-21 23:06:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:06:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:06:48,596 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:06:48,596 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:06:48,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:06:48,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:06:48 BoogieIcfgContainer [2020-08-21 23:06:48,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:06:48,622 INFO L168 Benchmark]: Toolchain (without parser) took 5874.55 ms. Allocated memory was 145.8 MB in the beginning and 284.2 MB in the end (delta: 138.4 MB). Free memory was 101.6 MB in the beginning and 153.8 MB in the end (delta: -52.2 MB). Peak memory consumption was 86.2 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:48,623 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:06:48,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.55 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 101.1 MB in the beginning and 177.2 MB in the end (delta: -76.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:48,625 INFO L168 Benchmark]: Boogie Preprocessor took 49.85 ms. Allocated memory is still 201.3 MB. Free memory was 177.2 MB in the beginning and 175.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:48,625 INFO L168 Benchmark]: RCFGBuilder took 526.62 ms. Allocated memory is still 201.3 MB. Free memory was 175.2 MB in the beginning and 147.4 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:48,626 INFO L168 Benchmark]: TraceAbstraction took 4809.08 ms. Allocated memory was 201.3 MB in the beginning and 284.2 MB in the end (delta: 82.8 MB). Free memory was 146.7 MB in the beginning and 153.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 75.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:06:48,631 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 484.55 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 101.1 MB in the beginning and 177.2 MB in the end (delta: -76.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.85 ms. Allocated memory is still 201.3 MB. Free memory was 177.2 MB in the beginning and 175.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 526.62 ms. Allocated memory is still 201.3 MB. Free memory was 175.2 MB in the beginning and 147.4 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4809.08 ms. Allocated memory was 201.3 MB in the beginning and 284.2 MB in the end (delta: 82.8 MB). Free memory was 146.7 MB in the beginning and 153.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 75.8 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...