/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 -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 11:27:47,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:27:47,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:27:47,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:27:47,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:27:47,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:27:47,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:27:47,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:27:47,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:27:47,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:27:47,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:27:47,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:27:47,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:27:47,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:27:47,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:27:47,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:27:47,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:27:47,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:27:47,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:27:47,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:27:47,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:27:47,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:27:47,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:27:47,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:27:47,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 11:27:47,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 11:27:47,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 11:27:47,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 11:27:47,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 11:27:47,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 11:27:47,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:27:47,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:27:47,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:27:47,584 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 11:27:47,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:27:47,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:27:47,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:27:47,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:27:47,609 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:27:47,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:27:47,609 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:27:47,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:27:47,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:27:47,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:27:47,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:27:47,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:27:47,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:27:47,611 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:27:47,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:27:47,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:27:47,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:27:47,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:27:47,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:27:47,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:27:47,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:27:47,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:27:47,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:27:47,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:27:47,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:27:47,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:27:47,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:27:47,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:27:47,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:27:47,614 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 [2020-08-18 11:27:47,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:27:47,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:27:47,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:27:47,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:27:47,945 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:27:47,945 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 11:27:48,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/947338aa5/da00bf760de049819639b3451f4d91a6/FLAGe3e6ee504 [2020-08-18 11:27:48,495 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:27:48,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 11:27:48,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/947338aa5/da00bf760de049819639b3451f4d91a6/FLAGe3e6ee504 [2020-08-18 11:27:48,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/947338aa5/da00bf760de049819639b3451f4d91a6 [2020-08-18 11:27:48,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:27:48,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:27:48,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:27:48,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:27:48,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:27:48,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:27:48" (1/1) ... [2020-08-18 11:27:48,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e33fb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:48, skipping insertion in model container [2020-08-18 11:27:48,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:27:48" (1/1) ... [2020-08-18 11:27:48,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:27:48,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:27:49,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:27:49,107 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:27:49,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:27:49,240 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:27:49,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49 WrapperNode [2020-08-18 11:27:49,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:27:49,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:27:49,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:27:49,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:27:49,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:27:49,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:27:49,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:27:49,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:27:49,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (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 11:27:49,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:27:49,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:27:49,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 11:27:49,353 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-18 11:27:49,353 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-18 11:27:49,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:27:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:27:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 11:27:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-18 11:27:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-18 11:27:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-18 11:27:49,354 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-18 11:27:49,355 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-18 11:27:49,355 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-18 11:27:49,355 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-18 11:27:49,355 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-18 11:27:49,355 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-18 11:27:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-18 11:27:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-18 11:27:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-18 11:27:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-18 11:27:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-18 11:27:49,356 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-18 11:27:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-18 11:27:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-18 11:27:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-18 11:27:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-18 11:27:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-18 11:27:49,357 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-18 11:27:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-18 11:27:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-18 11:27:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-18 11:27:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-18 11:27:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-18 11:27:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 11:27:49,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 11:27:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 11:27:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 11:27:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:27:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:27:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:27:49,846 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:27:49,847 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 11:27:49,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:27:49 BoogieIcfgContainer [2020-08-18 11:27:49,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:27:49,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:27:49,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:27:49,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:27:49,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:27:48" (1/3) ... [2020-08-18 11:27:49,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4746cc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:27:49, skipping insertion in model container [2020-08-18 11:27:49,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (2/3) ... [2020-08-18 11:27:49,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4746cc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:27:49, skipping insertion in model container [2020-08-18 11:27:49,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:27:49" (3/3) ... [2020-08-18 11:27:49,860 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 11:27:49,871 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:27:49,879 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:27:49,894 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:27:49,921 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:27:49,922 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:27:49,922 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:27:49,922 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:27:49,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:27:49,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:27:49,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:27:49,923 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:27:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-18 11:27:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 11:27:49,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:49,955 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 11:27:49,956 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-08-18 11:27:49,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:49,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865976845] [2020-08-18 11:27:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 11:27:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,223 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 11:27:50,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865976845] [2020-08-18 11:27:50,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:50,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 11:27:50,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011543527] [2020-08-18 11:27:50,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 11:27:50,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:50,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 11:27:50,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 11:27:50,251 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-08-18 11:27:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:50,422 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-08-18 11:27:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 11:27:50,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 11:27:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:50,433 INFO L225 Difference]: With dead ends: 93 [2020-08-18 11:27:50,434 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 11:27:50,439 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 11:27:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 11:27:50,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-18 11:27:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 11:27:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-08-18 11:27:50,481 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-08-18 11:27:50,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:50,482 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-08-18 11:27:50,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 11:27:50,482 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-08-18 11:27:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 11:27:50,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:50,484 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 11:27:50,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:27:50,485 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-08-18 11:27:50,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:50,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104638255] [2020-08-18 11:27:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:27:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,571 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 11:27:50,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104638255] [2020-08-18 11:27:50,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:50,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:27:50,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220868169] [2020-08-18 11:27:50,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 11:27:50,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 11:27:50,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 11:27:50,576 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-08-18 11:27:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:50,689 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-08-18 11:27:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 11:27:50,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-18 11:27:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:50,691 INFO L225 Difference]: With dead ends: 78 [2020-08-18 11:27:50,691 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 11:27:50,693 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 11:27:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 11:27:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-18 11:27:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 11:27:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-18 11:27:50,702 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-08-18 11:27:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:50,703 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-18 11:27:50,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 11:27:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-18 11:27:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 11:27:50,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:50,705 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 11:27:50,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:27:50,705 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:50,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:50,706 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-08-18 11:27:50,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:50,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468849074] [2020-08-18 11:27:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:27:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,888 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 11:27:50,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468849074] [2020-08-18 11:27:50,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:50,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:27:50,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993101435] [2020-08-18 11:27:50,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:27:50,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:27:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:27:50,891 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-08-18 11:27:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:51,236 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-08-18 11:27:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:27:51,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-18 11:27:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:51,242 INFO L225 Difference]: With dead ends: 140 [2020-08-18 11:27:51,242 INFO L226 Difference]: Without dead ends: 91 [2020-08-18 11:27:51,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:27:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-18 11:27:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-08-18 11:27:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 11:27:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-08-18 11:27:51,262 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-08-18 11:27:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:51,263 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-08-18 11:27:51,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:27:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-08-18 11:27:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 11:27:51,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:51,265 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 11:27:51,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:27:51,266 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:51,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-08-18 11:27:51,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:51,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218238562] [2020-08-18 11:27:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:51,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:27:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:51,379 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 11:27:51,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218238562] [2020-08-18 11:27:51,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:51,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:27:51,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314344169] [2020-08-18 11:27:51,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:27:51,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:51,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:27:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:27:51,381 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-08-18 11:27:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:51,622 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-08-18 11:27:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:27:51,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-18 11:27:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:51,625 INFO L225 Difference]: With dead ends: 136 [2020-08-18 11:27:51,625 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 11:27:51,626 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 11:27:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 11:27:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-08-18 11:27:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 11:27:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-08-18 11:27:51,639 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-08-18 11:27:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:51,639 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-08-18 11:27:51,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:27:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-08-18 11:27:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 11:27:51,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:51,642 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 11:27:51,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:27:51,642 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-08-18 11:27:51,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:51,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267718393] [2020-08-18 11:27:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:51,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:51,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 11:27:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:51,766 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 11:27:51,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267718393] [2020-08-18 11:27:51,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:51,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 11:27:51,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228909734] [2020-08-18 11:27:51,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 11:27:51,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:51,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 11:27:51,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:27:51,771 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-08-18 11:27:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:52,001 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-08-18 11:27:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 11:27:52,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 11:27:52,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:52,003 INFO L225 Difference]: With dead ends: 138 [2020-08-18 11:27:52,003 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 11:27:52,006 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 11:27:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 11:27:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-08-18 11:27:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 11:27:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-08-18 11:27:52,016 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-08-18 11:27:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:52,016 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-08-18 11:27:52,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 11:27:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-08-18 11:27:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 11:27:52,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:52,018 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 11:27:52,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:27:52,018 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-08-18 11:27:52,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:52,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967274261] [2020-08-18 11:27:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:27:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,067 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 11:27:52,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967274261] [2020-08-18 11:27:52,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:52,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:27:52,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971142652] [2020-08-18 11:27:52,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:27:52,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:27:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:27:52,070 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-08-18 11:27:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:52,163 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-08-18 11:27:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:27:52,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-18 11:27:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:52,164 INFO L225 Difference]: With dead ends: 124 [2020-08-18 11:27:52,165 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 11:27:52,165 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 11:27:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 11:27:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-08-18 11:27:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 11:27:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-18 11:27:52,174 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-08-18 11:27:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:52,174 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-18 11:27:52,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:27:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-18 11:27:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 11:27:52,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:52,177 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 11:27:52,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:27:52,177 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-08-18 11:27:52,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:52,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868060645] [2020-08-18 11:27:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 11:27:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,287 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 11:27:52,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868060645] [2020-08-18 11:27:52,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:52,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:27:52,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70620408] [2020-08-18 11:27:52,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:27:52,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:27:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:27:52,290 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-08-18 11:27:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:52,460 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-08-18 11:27:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:27:52,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-18 11:27:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:52,462 INFO L225 Difference]: With dead ends: 147 [2020-08-18 11:27:52,462 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 11:27:52,463 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 11:27:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 11:27:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-18 11:27:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 11:27:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-08-18 11:27:52,470 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-08-18 11:27:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:52,471 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-08-18 11:27:52,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:27:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-08-18 11:27:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 11:27:52,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:52,472 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 11:27:52,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:27:52,473 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-08-18 11:27:52,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:52,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045050349] [2020-08-18 11:27:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 11:27:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,580 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 11:27:52,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045050349] [2020-08-18 11:27:52,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:52,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 11:27:52,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648871564] [2020-08-18 11:27:52,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:27:52,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:27:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:27:52,583 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-08-18 11:27:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:52,812 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-08-18 11:27:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 11:27:52,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-18 11:27:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:52,816 INFO L225 Difference]: With dead ends: 107 [2020-08-18 11:27:52,816 INFO L226 Difference]: Without dead ends: 105 [2020-08-18 11:27:52,818 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 11:27:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-18 11:27:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-08-18 11:27:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 11:27:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-08-18 11:27:52,835 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-08-18 11:27:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:52,835 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-08-18 11:27:52,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:27:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-08-18 11:27:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 11:27:52,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:52,839 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 11:27:52,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:27:52,840 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-08-18 11:27:52,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:52,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004131151] [2020-08-18 11:27:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 11:27:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:52,958 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 11:27:52,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004131151] [2020-08-18 11:27:52,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:27:52,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 11:27:52,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368691931] [2020-08-18 11:27:52,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:27:52,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:52,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:27:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:27:52,966 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-08-18 11:27:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:53,155 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-08-18 11:27:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:27:53,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 11:27:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:53,159 INFO L225 Difference]: With dead ends: 209 [2020-08-18 11:27:53,159 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 11:27:53,160 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 11:27:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 11:27:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-08-18 11:27:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-18 11:27:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-08-18 11:27:53,169 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-08-18 11:27:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:53,169 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-08-18 11:27:53,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:27:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-08-18 11:27:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 11:27:53,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:53,171 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 11:27:53,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:27:53,171 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-08-18 11:27:53,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:53,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464184231] [2020-08-18 11:27:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:53,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:53,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 11:27:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:53,301 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 11:27:53,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464184231] [2020-08-18 11:27:53,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:27:53,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 11:27:53,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563993573] [2020-08-18 11:27:53,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 11:27:53,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 11:27:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:27:53,303 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-08-18 11:27:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:53,853 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-08-18 11:27:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 11:27:53,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-08-18 11:27:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:53,855 INFO L225 Difference]: With dead ends: 240 [2020-08-18 11:27:53,855 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 11:27:53,856 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 [2020-08-18 11:27:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 11:27:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-08-18 11:27:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-18 11:27:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-08-18 11:27:53,865 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-08-18 11:27:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:53,866 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-08-18 11:27:53,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 11:27:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-08-18 11:27:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 11:27:53,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:53,867 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 11:27:53,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:27:53,868 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-08-18 11:27:53,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:53,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858140625] [2020-08-18 11:27:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:54,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:54,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 11:27:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:54,013 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 11:27:54,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858140625] [2020-08-18 11:27:54,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:27:54,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 11:27:54,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363979146] [2020-08-18 11:27:54,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 11:27:54,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:54,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 11:27:54,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:27:54,015 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 11 states. [2020-08-18 11:27:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:54,405 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-18 11:27:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 11:27:54,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-18 11:27:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:54,408 INFO L225 Difference]: With dead ends: 202 [2020-08-18 11:27:54,408 INFO L226 Difference]: Without dead ends: 200 [2020-08-18 11:27:54,409 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 [2020-08-18 11:27:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-18 11:27:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-08-18 11:27:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 11:27:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-08-18 11:27:54,422 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-08-18 11:27:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:54,423 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-08-18 11:27:54,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 11:27:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-08-18 11:27:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 11:27:54,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:54,435 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 11:27:54,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:27:54,435 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-08-18 11:27:54,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:54,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867579267] [2020-08-18 11:27:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 11:27:54,465 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 11:27:54,465 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 11:27:54,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 11:27:54,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:27:54 BoogieIcfgContainer [2020-08-18 11:27:54,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:27:54,495 INFO L168 Benchmark]: Toolchain (without parser) took 5639.94 ms. Allocated memory was 138.4 MB in the beginning and 288.4 MB in the end (delta: 149.9 MB). Free memory was 101.0 MB in the beginning and 158.8 MB in the end (delta: -57.8 MB). Peak memory consumption was 92.1 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:54,499 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-18 11:27:54,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.13 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.0 MB in the beginning and 178.2 MB in the end (delta: -77.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:54,503 INFO L168 Benchmark]: Boogie Preprocessor took 48.56 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 175.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:54,503 INFO L168 Benchmark]: RCFGBuilder took 560.92 ms. Allocated memory is still 200.8 MB. Free memory was 175.9 MB in the beginning and 148.0 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:54,506 INFO L168 Benchmark]: TraceAbstraction took 4639.80 ms. Allocated memory was 200.8 MB in the beginning and 288.4 MB in the end (delta: 87.6 MB). Free memory was 147.1 MB in the beginning and 158.8 MB in the end (delta: -11.8 MB). Peak memory consumption was 75.8 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:54,516 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 386.13 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.0 MB in the beginning and 178.2 MB in the end (delta: -77.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.56 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 175.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 560.92 ms. Allocated memory is still 200.8 MB. Free memory was 175.9 MB in the beginning and 148.0 MB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4639.80 ms. Allocated memory was 200.8 MB in the beginning and 288.4 MB in the end (delta: 87.6 MB). Free memory was 147.1 MB in the beginning and 158.8 MB in the end (delta: -11.8 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: 4.5s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 2.8s, 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, 1.6s 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...