/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -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 0.1.25-5644d1e-m [2020-08-18 18:00:43,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:00:43,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:00:43,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:00:43,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:00:43,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:00:43,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:00:43,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:00:43,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:00:43,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:00:43,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:00:43,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:00:43,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:00:43,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:00:43,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:00:43,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:00:43,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:00:43,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:00:43,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:00:43,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:00:43,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:00:43,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:00:43,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:00:43,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:00:43,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:00:43,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:00:43,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:00:43,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:00:43,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:00:43,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:00:43,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:00:43,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:00:43,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:00:43,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:00:43,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:00:43,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:00:43,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:00:43,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:00:43,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:00:43,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:00:43,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:00:43,895 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 [2020-08-18 18:00:43,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:00:43,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:00:43,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:00:43,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:00:43,938 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:00:43,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:00:43,938 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:00:43,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:00:43,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:00:43,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:00:43,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:00:43,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:00:43,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:00:43,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:00:43,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:00:43,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:00:43,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:00:43,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:00:43,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:00:43,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:00:43,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:00:43,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:00:43,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:00:43,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:00:43,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:00:43,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:00:43,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:00:43,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:00:43,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:00:43,944 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=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:00:44,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:00:44,319 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:00:44,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:00:44,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:00:44,326 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:00:44,327 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 18:00:44,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba9b9cd4c/9995f4299b124958b643aea81ea0d68b/FLAGf645778d3 [2020-08-18 18:00:44,875 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:00:44,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 18:00:44,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba9b9cd4c/9995f4299b124958b643aea81ea0d68b/FLAGf645778d3 [2020-08-18 18:00:45,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ba9b9cd4c/9995f4299b124958b643aea81ea0d68b [2020-08-18 18:00:45,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:00:45,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:00:45,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:00:45,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:00:45,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:00:45,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11335913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45, skipping insertion in model container [2020-08-18 18:00:45,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:00:45,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:00:45,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:00:45,501 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:00:45,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:00:45,634 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:00:45,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45 WrapperNode [2020-08-18 18:00:45,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:00:45,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:00:45,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:00:45,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:00:45,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (1/1) ... [2020-08-18 18:00:45,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:00:45,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:00:45,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:00:45,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:00:45,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (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 [2020-08-18 18:00:45,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:00:45,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:00:45,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:00:45,751 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-18 18:00:45,751 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-18 18:00:45,751 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:00:45,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:00:45,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:00:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-18 18:00:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-18 18:00:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-18 18:00:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-18 18:00:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-18 18:00:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-18 18:00:45,752 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-18 18:00:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-18 18:00:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-18 18:00:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-18 18:00:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-18 18:00:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-18 18:00:45,753 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-18 18:00:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-18 18:00:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-18 18:00:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-18 18:00:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-18 18:00:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-18 18:00:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-18 18:00:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-18 18:00:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-18 18:00:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-18 18:00:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-18 18:00:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-18 18:00:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-18 18:00:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-18 18:00:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 18:00:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 18:00:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 18:00:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 18:00:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:00:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:00:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:00:46,206 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:00:46,207 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 18:00:46,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:00:46 BoogieIcfgContainer [2020-08-18 18:00:46,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:00:46,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:00:46,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:00:46,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:00:46,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:00:45" (1/3) ... [2020-08-18 18:00:46,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd53bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:00:46, skipping insertion in model container [2020-08-18 18:00:46,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:00:45" (2/3) ... [2020-08-18 18:00:46,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd53bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:00:46, skipping insertion in model container [2020-08-18 18:00:46,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:00:46" (3/3) ... [2020-08-18 18:00:46,221 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 18:00:46,232 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:00:46,239 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:00:46,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:00:46,274 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:00:46,275 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:00:46,275 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:00:46,275 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:00:46,275 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:00:46,276 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:00:46,276 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:00:46,276 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:00:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-18 18:00:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 18:00:46,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:46,305 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] [2020-08-18 18:00:46,305 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-08-18 18:00:46,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:46,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350891333] [2020-08-18 18:00:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:46,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:46,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 18:00:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:46,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350891333] [2020-08-18 18:00:46,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:46,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:00:46,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862925006] [2020-08-18 18:00:46,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:00:46,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:46,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:00:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:00:46,578 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-08-18 18:00:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:46,750 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-08-18 18:00:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:00:46,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 18:00:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:46,761 INFO L225 Difference]: With dead ends: 93 [2020-08-18 18:00:46,762 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 18:00:46,765 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 [2020-08-18 18:00:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 18:00:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-18 18:00:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 18:00:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-08-18 18:00:46,805 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-08-18 18:00:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:46,806 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-08-18 18:00:46,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:00:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-08-18 18:00:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 18:00:46,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:46,808 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] [2020-08-18 18:00:46,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:00:46,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-08-18 18:00:46,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:46,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474208717] [2020-08-18 18:00:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:46,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:46,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 18:00:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:46,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474208717] [2020-08-18 18:00:46,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:46,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:00:46,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344079365] [2020-08-18 18:00:46,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:00:46,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:00:46,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:00:46,908 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-08-18 18:00:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:47,041 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-08-18 18:00:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:00:47,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-18 18:00:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:47,043 INFO L225 Difference]: With dead ends: 78 [2020-08-18 18:00:47,043 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 18:00:47,045 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 [2020-08-18 18:00:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 18:00:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-18 18:00:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 18:00:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-18 18:00:47,054 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-08-18 18:00:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:47,054 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-18 18:00:47,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:00:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-18 18:00:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 18:00:47,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:47,056 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] [2020-08-18 18:00:47,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:00:47,057 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-08-18 18:00:47,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:47,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561297612] [2020-08-18 18:00:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:47,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:47,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 18:00:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:47,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561297612] [2020-08-18 18:00:47,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:47,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:00:47,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623016659] [2020-08-18 18:00:47,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:00:47,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:47,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:00:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:00:47,258 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-08-18 18:00:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:47,594 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-08-18 18:00:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:00:47,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-18 18:00:47,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:47,599 INFO L225 Difference]: With dead ends: 140 [2020-08-18 18:00:47,600 INFO L226 Difference]: Without dead ends: 91 [2020-08-18 18:00:47,601 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 [2020-08-18 18:00:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-18 18:00:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-08-18 18:00:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 18:00:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-08-18 18:00:47,618 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-08-18 18:00:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:47,619 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-08-18 18:00:47,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:00:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-08-18 18:00:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 18:00:47,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:47,620 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] [2020-08-18 18:00:47,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:00:47,621 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-08-18 18:00:47,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:47,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591285330] [2020-08-18 18:00:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:47,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:47,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 18:00:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:47,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591285330] [2020-08-18 18:00:47,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:47,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:00:47,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625050814] [2020-08-18 18:00:47,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:00:47,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:00:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:47,746 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-08-18 18:00:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:47,985 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-08-18 18:00:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:00:47,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-18 18:00:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:47,988 INFO L225 Difference]: With dead ends: 136 [2020-08-18 18:00:47,988 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 18:00:47,989 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 [2020-08-18 18:00:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 18:00:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-08-18 18:00:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 18:00:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-08-18 18:00:48,000 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-08-18 18:00:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:48,000 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-08-18 18:00:48,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:00:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-08-18 18:00:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 18:00:48,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:48,002 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] [2020-08-18 18:00:48,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:00:48,003 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:48,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-08-18 18:00:48,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:48,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238913975] [2020-08-18 18:00:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 18:00:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:48,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238913975] [2020-08-18 18:00:48,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:48,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:00:48,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926639706] [2020-08-18 18:00:48,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:00:48,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:48,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:00:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:00:48,094 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-08-18 18:00:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:48,267 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-08-18 18:00:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:00:48,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 18:00:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:48,269 INFO L225 Difference]: With dead ends: 138 [2020-08-18 18:00:48,269 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 18:00:48,270 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 [2020-08-18 18:00:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 18:00:48,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-08-18 18:00:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 18:00:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-08-18 18:00:48,280 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-08-18 18:00:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:48,281 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-08-18 18:00:48,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:00:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-08-18 18:00:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 18:00:48,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:48,282 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] [2020-08-18 18:00:48,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:00:48,283 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-08-18 18:00:48,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:48,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475606803] [2020-08-18 18:00:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 18:00:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:48,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475606803] [2020-08-18 18:00:48,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:48,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:00:48,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328198397] [2020-08-18 18:00:48,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:00:48,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:00:48,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:00:48,338 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-08-18 18:00:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:48,432 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-08-18 18:00:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:00:48,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-18 18:00:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:48,433 INFO L225 Difference]: With dead ends: 124 [2020-08-18 18:00:48,434 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 18:00:48,434 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 [2020-08-18 18:00:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 18:00:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-08-18 18:00:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 18:00:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-18 18:00:48,443 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-08-18 18:00:48,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:48,444 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-18 18:00:48,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:00:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-18 18:00:48,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 18:00:48,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:48,445 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] [2020-08-18 18:00:48,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:00:48,446 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-08-18 18:00:48,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:48,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340413445] [2020-08-18 18:00:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 18:00:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:48,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340413445] [2020-08-18 18:00:48,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:48,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:00:48,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5095150] [2020-08-18 18:00:48,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:00:48,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:00:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:00:48,525 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-08-18 18:00:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:48,672 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-08-18 18:00:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:00:48,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-18 18:00:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:48,674 INFO L225 Difference]: With dead ends: 147 [2020-08-18 18:00:48,674 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 18:00:48,675 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 [2020-08-18 18:00:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 18:00:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-18 18:00:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 18:00:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-08-18 18:00:48,692 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-08-18 18:00:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:48,696 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-08-18 18:00:48,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:00:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-08-18 18:00:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 18:00:48,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:48,698 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] [2020-08-18 18:00:48,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:00:48,700 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-08-18 18:00:48,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:48,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336904119] [2020-08-18 18:00:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 18:00:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:00:48,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336904119] [2020-08-18 18:00:48,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:00:48,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:00:48,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104938158] [2020-08-18 18:00:48,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:00:48,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:48,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:00:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:00:48,885 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-08-18 18:00:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:49,129 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-08-18 18:00:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:00:49,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-18 18:00:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:49,131 INFO L225 Difference]: With dead ends: 107 [2020-08-18 18:00:49,131 INFO L226 Difference]: Without dead ends: 105 [2020-08-18 18:00:49,132 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 [2020-08-18 18:00:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-18 18:00:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-08-18 18:00:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 18:00:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-08-18 18:00:49,141 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-08-18 18:00:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:49,141 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-08-18 18:00:49,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:00:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-08-18 18:00:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 18:00:49,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:49,144 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] [2020-08-18 18:00:49,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:00:49,144 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-08-18 18:00:49,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:49,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522425803] [2020-08-18 18:00:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:49,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:49,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 18:00:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:49,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522425803] [2020-08-18 18:00:49,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:49,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:00:49,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025631764] [2020-08-18 18:00:49,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:00:49,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:49,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:00:49,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:00:49,211 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-08-18 18:00:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:49,397 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-08-18 18:00:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:00:49,398 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 18:00:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:49,402 INFO L225 Difference]: With dead ends: 209 [2020-08-18 18:00:49,402 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 18:00:49,403 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 [2020-08-18 18:00:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 18:00:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-08-18 18:00:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-18 18:00:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-08-18 18:00:49,414 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-08-18 18:00:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:49,415 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-08-18 18:00:49,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:00:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-08-18 18:00:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 18:00:49,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:49,421 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] [2020-08-18 18:00:49,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:00:49,422 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-08-18 18:00:49,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:49,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762713290] [2020-08-18 18:00:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:49,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:49,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:00:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:49,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762713290] [2020-08-18 18:00:49,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:49,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:00:49,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913962772] [2020-08-18 18:00:49,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:00:49,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:49,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:00:49,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:00:49,599 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-08-18 18:00:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:50,096 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-08-18 18:00:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 18:00:50,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-08-18 18:00:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:50,100 INFO L225 Difference]: With dead ends: 240 [2020-08-18 18:00:50,101 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 18:00:50,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-08-18 18:00:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 18:00:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-08-18 18:00:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-18 18:00:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-08-18 18:00:50,113 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-08-18 18:00:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:50,114 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-08-18 18:00:50,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:00:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-08-18 18:00:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 18:00:50,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:50,117 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] [2020-08-18 18:00:50,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:00:50,117 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-08-18 18:00:50,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:50,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127350459] [2020-08-18 18:00:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:50,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:00:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:50,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 18:00:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:00:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:00:50,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127350459] [2020-08-18 18:00:50,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:00:50,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:00:50,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551152067] [2020-08-18 18:00:50,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:00:50,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:00:50,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:00:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:00:50,316 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 11 states. [2020-08-18 18:00:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:00:50,747 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-18 18:00:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:00:50,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-18 18:00:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:00:50,750 INFO L225 Difference]: With dead ends: 202 [2020-08-18 18:00:50,750 INFO L226 Difference]: Without dead ends: 200 [2020-08-18 18:00:50,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:00:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-18 18:00:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-08-18 18:00:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 18:00:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-08-18 18:00:50,761 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-08-18 18:00:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:00:50,762 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-08-18 18:00:50,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:00:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-08-18 18:00:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 18:00:50,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:00:50,763 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] [2020-08-18 18:00:50,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:00:50,763 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:00:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:00:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-08-18 18:00:50,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:00:50,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554027280] [2020-08-18 18:00:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:00:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:00:50,781 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:00:50,781 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:00:50,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:00:50,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:00:50 BoogieIcfgContainer [2020-08-18 18:00:50,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:00:50,809 INFO L168 Benchmark]: Toolchain (without parser) took 5563.89 ms. Allocated memory was 144.7 MB in the beginning and 279.4 MB in the end (delta: 134.7 MB). Free memory was 106.5 MB in the beginning and 228.4 MB in the end (delta: -121.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:50,810 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:00:50,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.15 ms. Allocated memory was 144.7 MB in the beginning and 206.0 MB in the end (delta: 61.3 MB). Free memory was 106.3 MB in the beginning and 182.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:50,812 INFO L168 Benchmark]: Boogie Preprocessor took 49.43 ms. Allocated memory is still 206.0 MB. Free memory was 182.5 MB in the beginning and 180.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:50,812 INFO L168 Benchmark]: RCFGBuilder took 526.95 ms. Allocated memory is still 206.0 MB. Free memory was 180.2 MB in the beginning and 152.8 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:00:50,813 INFO L168 Benchmark]: TraceAbstraction took 4592.08 ms. Allocated memory was 206.0 MB in the beginning and 279.4 MB in the end (delta: 73.4 MB). Free memory was 152.2 MB in the beginning and 228.4 MB in the end (delta: -76.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:00:50,817 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 390.15 ms. Allocated memory was 144.7 MB in the beginning and 206.0 MB in the end (delta: 61.3 MB). Free memory was 106.3 MB in the beginning and 182.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.43 ms. Allocated memory is still 206.0 MB. Free memory was 182.5 MB in the beginning and 180.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 526.95 ms. Allocated memory is still 206.0 MB. Free memory was 180.2 MB in the beginning and 152.8 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4592.08 ms. Allocated memory was 206.0 MB in the beginning and 279.4 MB in the end (delta: 73.4 MB). Free memory was 152.2 MB in the beginning and 228.4 MB in the end (delta: -76.2 MB). There was no memory consumed. 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: 4.5s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 2.7s, 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, 1.5s 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...