/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=SMALLEST -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 17:12:23,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:12:23,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:12:23,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:12:23,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:12:23,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:12:23,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:12:23,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:12:23,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:12:23,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:12:23,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:12:23,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:12:23,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:12:23,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:12:23,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:12:23,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:12:23,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:12:23,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:12:23,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:12:23,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:12:23,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:12:23,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:12:23,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:12:23,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:12:23,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:12:23,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:12:23,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:12:23,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:12:23,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:12:23,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:12:23,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:12:23,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:12:23,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:12:23,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:12:23,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:12:23,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:12:23,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:12:23,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:12:23,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:12:23,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:12:23,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:12:23,607 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 17:12:23,646 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:12:23,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:12:23,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:12:23,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:12:23,649 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:12:23,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:12:23,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:12:23,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:12:23,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:12:23,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:12:23,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:12:23,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:12:23,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:12:23,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:12:23,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:12:23,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:12:23,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:12:23,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:12:23,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:12:23,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:12:23,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:12:23,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:12:23,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:12:23,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:12:23,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:12:23,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:12:23,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:12:23,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:12:23,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:12:23,655 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:12:23,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:12:23,995 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:12:24,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:12:24,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:12:24,006 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:12:24,007 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 17:12:24,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fad6045a4/e2f5ff5a5557446a9167bf4e2522d054/FLAGde9fd2c8f [2020-08-18 17:12:24,536 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:12:24,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 17:12:24,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fad6045a4/e2f5ff5a5557446a9167bf4e2522d054/FLAGde9fd2c8f [2020-08-18 17:12:24,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fad6045a4/e2f5ff5a5557446a9167bf4e2522d054 [2020-08-18 17:12:24,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:12:24,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:12:24,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:12:24,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:12:24,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:12:24,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:12:24" (1/1) ... [2020-08-18 17:12:24,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2839cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:24, skipping insertion in model container [2020-08-18 17:12:24,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:12:24" (1/1) ... [2020-08-18 17:12:24,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:12:24,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:12:25,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:12:25,162 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:12:25,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:12:25,312 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:12:25,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25 WrapperNode [2020-08-18 17:12:25,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:12:25,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:12:25,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:12:25,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:12:25,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (1/1) ... [2020-08-18 17:12:25,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (1/1) ... [2020-08-18 17:12:25,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (1/1) ... [2020-08-18 17:12:25,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (1/1) ... [2020-08-18 17:12:25,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (1/1) ... [2020-08-18 17:12:25,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (1/1) ... [2020-08-18 17:12:25,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (1/1) ... [2020-08-18 17:12:25,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:12:25,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:12:25,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:12:25,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:12:25,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (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 17:12:25,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:12:25,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:12:25,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 17:12:25,423 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-18 17:12:25,423 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-18 17:12:25,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:12:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:12:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 17:12:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-18 17:12:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-18 17:12:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-18 17:12:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-18 17:12:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-18 17:12:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-18 17:12:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-18 17:12:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-18 17:12:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-18 17:12:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-18 17:12:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-18 17:12:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-18 17:12:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-18 17:12:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-18 17:12:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-18 17:12:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-18 17:12:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-18 17:12:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-18 17:12:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-18 17:12:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-18 17:12:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-18 17:12:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-18 17:12:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-18 17:12:25,427 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-18 17:12:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-18 17:12:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-18 17:12:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:12:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:12:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:12:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:12:25,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:12:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:12:25,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:12:25,923 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:12:25,924 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 17:12:25,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:12:25 BoogieIcfgContainer [2020-08-18 17:12:25,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:12:25,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:12:25,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:12:25,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:12:25,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:12:24" (1/3) ... [2020-08-18 17:12:25,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca81210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:12:25, skipping insertion in model container [2020-08-18 17:12:25,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:12:25" (2/3) ... [2020-08-18 17:12:25,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca81210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:12:25, skipping insertion in model container [2020-08-18 17:12:25,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:12:25" (3/3) ... [2020-08-18 17:12:25,937 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-18 17:12:25,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:12:25,954 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:12:25,968 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:12:25,994 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:12:25,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:12:25,994 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:12:25,994 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:12:25,995 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:12:25,995 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:12:25,995 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:12:25,995 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:12:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-18 17:12:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 17:12:26,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:26,023 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 17:12:26,023 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-08-18 17:12:26,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:26,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715403444] [2020-08-18 17:12:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:26,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:26,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 17:12:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:26,261 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 17:12:26,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715403444] [2020-08-18 17:12:26,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:26,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:12:26,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301399884] [2020-08-18 17:12:26,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:12:26,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:26,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:12:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:12:26,288 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-08-18 17:12:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:26,472 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-08-18 17:12:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:12:26,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 17:12:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:26,483 INFO L225 Difference]: With dead ends: 93 [2020-08-18 17:12:26,483 INFO L226 Difference]: Without dead ends: 43 [2020-08-18 17:12:26,487 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 17:12:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-18 17:12:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-18 17:12:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 17:12:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-08-18 17:12:26,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-08-18 17:12:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:26,531 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-08-18 17:12:26,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:12:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-08-18 17:12:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 17:12:26,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:26,534 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 17:12:26,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:12:26,534 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-08-18 17:12:26,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:26,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270471012] [2020-08-18 17:12:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:26,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:26,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 17:12:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:26,634 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 17:12:26,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270471012] [2020-08-18 17:12:26,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:26,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:12:26,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126348303] [2020-08-18 17:12:26,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:12:26,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:26,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:12:26,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:12:26,642 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-08-18 17:12:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:26,809 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-08-18 17:12:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:12:26,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-18 17:12:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:26,812 INFO L225 Difference]: With dead ends: 78 [2020-08-18 17:12:26,813 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 17:12:26,815 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 17:12:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 17:12:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-18 17:12:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 17:12:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-18 17:12:26,839 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-08-18 17:12:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:26,840 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-18 17:12:26,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:12:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-18 17:12:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 17:12:26,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:26,842 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 17:12:26,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:12:26,844 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-08-18 17:12:26,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:26,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968413698] [2020-08-18 17:12:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 17:12:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,028 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 17:12:27,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968413698] [2020-08-18 17:12:27,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:27,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:12:27,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686840046] [2020-08-18 17:12:27,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:12:27,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:12:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:12:27,032 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-08-18 17:12:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:27,369 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-08-18 17:12:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:12:27,370 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-18 17:12:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:27,374 INFO L225 Difference]: With dead ends: 140 [2020-08-18 17:12:27,374 INFO L226 Difference]: Without dead ends: 91 [2020-08-18 17:12:27,375 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 17:12:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-18 17:12:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-08-18 17:12:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-18 17:12:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-08-18 17:12:27,400 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-08-18 17:12:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:27,400 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-08-18 17:12:27,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:12:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-08-18 17:12:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 17:12:27,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:27,402 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 17:12:27,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:12:27,402 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:27,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-08-18 17:12:27,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:27,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022855186] [2020-08-18 17:12:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 17:12:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,557 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 17:12:27,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022855186] [2020-08-18 17:12:27,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:27,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:12:27,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515828636] [2020-08-18 17:12:27,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:12:27,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:27,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:12:27,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:12:27,563 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-08-18 17:12:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:27,843 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-08-18 17:12:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:12:27,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-18 17:12:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:27,845 INFO L225 Difference]: With dead ends: 136 [2020-08-18 17:12:27,845 INFO L226 Difference]: Without dead ends: 92 [2020-08-18 17:12:27,847 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 17:12:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-18 17:12:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-08-18 17:12:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 17:12:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-08-18 17:12:27,869 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-08-18 17:12:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:27,870 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-08-18 17:12:27,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:12:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-08-18 17:12:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 17:12:27,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:27,874 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 17:12:27,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:12:27,875 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:27,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-08-18 17:12:27,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:27,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780002086] [2020-08-18 17:12:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 17:12:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:27,987 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 17:12:27,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780002086] [2020-08-18 17:12:27,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:27,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:12:27,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451393477] [2020-08-18 17:12:27,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:12:27,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:12:27,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:12:27,990 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-08-18 17:12:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:28,194 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-08-18 17:12:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:12:28,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 17:12:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:28,201 INFO L225 Difference]: With dead ends: 138 [2020-08-18 17:12:28,201 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 17:12:28,202 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 17:12:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 17:12:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-08-18 17:12:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 17:12:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-08-18 17:12:28,223 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-08-18 17:12:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:28,223 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-08-18 17:12:28,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:12:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-08-18 17:12:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 17:12:28,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:28,229 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 17:12:28,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:12:28,229 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:28,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-08-18 17:12:28,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:28,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224586716] [2020-08-18 17:12:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 17:12:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,302 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 17:12:28,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224586716] [2020-08-18 17:12:28,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:28,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:12:28,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306240707] [2020-08-18 17:12:28,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:12:28,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:12:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:12:28,305 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-08-18 17:12:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:28,400 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-08-18 17:12:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:12:28,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-18 17:12:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:28,403 INFO L225 Difference]: With dead ends: 124 [2020-08-18 17:12:28,403 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 17:12:28,404 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 17:12:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 17:12:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-08-18 17:12:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 17:12:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-18 17:12:28,413 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-08-18 17:12:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:28,413 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-18 17:12:28,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:12:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-18 17:12:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 17:12:28,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:28,415 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 17:12:28,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:12:28,415 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:28,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-08-18 17:12:28,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:28,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100315491] [2020-08-18 17:12:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 17:12:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,474 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 17:12:28,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100315491] [2020-08-18 17:12:28,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:28,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 17:12:28,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036298738] [2020-08-18 17:12:28,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:12:28,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:28,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:12:28,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:12:28,477 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-08-18 17:12:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:28,677 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-08-18 17:12:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:12:28,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-18 17:12:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:28,679 INFO L225 Difference]: With dead ends: 147 [2020-08-18 17:12:28,679 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 17:12:28,680 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 17:12:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 17:12:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-18 17:12:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 17:12:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-08-18 17:12:28,694 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-08-18 17:12:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:28,695 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-08-18 17:12:28,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:12:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-08-18 17:12:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 17:12:28,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:28,696 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 17:12:28,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:12:28,697 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:28,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-08-18 17:12:28,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:28,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688387131] [2020-08-18 17:12:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 17:12:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:28,796 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 17:12:28,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688387131] [2020-08-18 17:12:28,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:12:28,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:12:28,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260590599] [2020-08-18 17:12:28,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:12:28,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:28,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:12:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:12:28,798 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-08-18 17:12:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:29,079 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-08-18 17:12:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:12:29,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-18 17:12:29,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:29,082 INFO L225 Difference]: With dead ends: 107 [2020-08-18 17:12:29,083 INFO L226 Difference]: Without dead ends: 105 [2020-08-18 17:12:29,083 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 17:12:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-18 17:12:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-08-18 17:12:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 17:12:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-08-18 17:12:29,093 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-08-18 17:12:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:29,093 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-08-18 17:12:29,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:12:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-08-18 17:12:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 17:12:29,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:29,096 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 17:12:29,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:12:29,096 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-08-18 17:12:29,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:29,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138174273] [2020-08-18 17:12:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:29,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:29,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 17:12:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:29,163 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 17:12:29,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138174273] [2020-08-18 17:12:29,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:12:29,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:12:29,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238882180] [2020-08-18 17:12:29,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:12:29,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:29,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:12:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:12:29,165 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-08-18 17:12:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:29,375 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-08-18 17:12:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:12:29,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-18 17:12:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:29,379 INFO L225 Difference]: With dead ends: 209 [2020-08-18 17:12:29,379 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 17:12:29,380 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 17:12:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 17:12:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-08-18 17:12:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-18 17:12:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-08-18 17:12:29,389 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-08-18 17:12:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:29,390 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-08-18 17:12:29,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:12:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-08-18 17:12:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 17:12:29,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:29,392 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 17:12:29,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:12:29,392 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:29,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-08-18 17:12:29,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:29,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022524217] [2020-08-18 17:12:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:29,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:29,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 17:12:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:29,571 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 17:12:29,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022524217] [2020-08-18 17:12:29,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:12:29,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:12:29,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952791019] [2020-08-18 17:12:29,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:12:29,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:12:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:12:29,575 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-08-18 17:12:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:30,144 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-08-18 17:12:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:12:30,144 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-08-18 17:12:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:30,148 INFO L225 Difference]: With dead ends: 240 [2020-08-18 17:12:30,148 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 17:12:30,150 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 17:12:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 17:12:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-08-18 17:12:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-18 17:12:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-08-18 17:12:30,169 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-08-18 17:12:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:30,169 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-08-18 17:12:30,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:12:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-08-18 17:12:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 17:12:30,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:30,176 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 17:12:30,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:12:30,176 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-08-18 17:12:30,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:30,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945848766] [2020-08-18 17:12:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:30,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:12:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:30,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 17:12:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:12:30,328 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 17:12:30,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945848766] [2020-08-18 17:12:30,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:12:30,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:12:30,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519207607] [2020-08-18 17:12:30,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:12:30,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:12:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:12:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:12:30,331 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 11 states. [2020-08-18 17:12:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:12:30,731 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-18 17:12:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:12:30,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-18 17:12:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:12:30,735 INFO L225 Difference]: With dead ends: 202 [2020-08-18 17:12:30,735 INFO L226 Difference]: Without dead ends: 200 [2020-08-18 17:12:30,736 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 17:12:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-18 17:12:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-08-18 17:12:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 17:12:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-08-18 17:12:30,749 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-08-18 17:12:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:12:30,750 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-08-18 17:12:30,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:12:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-08-18 17:12:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 17:12:30,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:12:30,758 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 17:12:30,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:12:30,758 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:12:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:12:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-08-18 17:12:30,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:12:30,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82356963] [2020-08-18 17:12:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:12:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:12:30,777 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:12:30,778 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:12:30,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:12:30,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:12:30 BoogieIcfgContainer [2020-08-18 17:12:30,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:12:30,804 INFO L168 Benchmark]: Toolchain (without parser) took 5892.40 ms. Allocated memory was 145.8 MB in the beginning and 276.8 MB in the end (delta: 131.1 MB). Free memory was 101.7 MB in the beginning and 131.7 MB in the end (delta: -30.0 MB). Peak memory consumption was 101.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:12:30,805 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 145.8 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:12:30,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.14 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 101.5 MB in the beginning and 179.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:12:30,807 INFO L168 Benchmark]: Boogie Preprocessor took 47.86 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 176.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:12:30,808 INFO L168 Benchmark]: RCFGBuilder took 566.46 ms. Allocated memory is still 202.9 MB. Free memory was 176.9 MB in the beginning and 148.9 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:12:30,809 INFO L168 Benchmark]: TraceAbstraction took 4872.47 ms. Allocated memory was 202.9 MB in the beginning and 276.8 MB in the end (delta: 73.9 MB). Free memory was 148.9 MB in the beginning and 131.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 91.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:12:30,812 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 145.8 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 400.14 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 101.5 MB in the beginning and 179.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.86 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 176.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 566.46 ms. Allocated memory is still 202.9 MB. Free memory was 176.9 MB in the beginning and 148.9 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4872.47 ms. Allocated memory was 202.9 MB in the beginning and 276.8 MB in the end (delta: 73.9 MB). Free memory was 148.9 MB in the beginning and 131.7 MB in the end (delta: 17.2 MB). Peak memory consumption was 91.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 901 SDslu, 1287 SDs, 0 SdLazy, 1834 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s 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, 0.9s 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...