/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -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 [2020-08-19 06:56:14,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:56:14,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:56:14,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:56:14,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:56:14,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:56:14,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:56:14,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:56:14,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:56:14,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:56:14,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:56:14,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:56:14,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:56:14,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:56:14,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:56:14,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:56:14,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:56:14,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:56:14,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:56:14,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:56:14,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:56:14,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:56:14,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:56:14,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:56:14,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:56:14,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:56:14,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:56:14,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:56:14,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:56:14,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:56:14,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:56:14,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:56:14,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:56:14,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:56:14,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:56:14,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:56:14,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:56:14,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:56:14,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:56:14,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:56:14,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:56:14,324 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 [2020-08-19 06:56:14,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:56:14,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:56:14,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:56:14,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:56:14,348 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:56:14,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:56:14,348 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:56:14,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:56:14,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:56:14,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:56:14,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:56:14,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:56:14,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:56:14,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:56:14,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:56:14,350 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:56:14,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:56:14,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:56:14,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:56:14,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:56:14,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:56:14,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:56:14,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:56:14,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:56:14,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:56:14,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:56:14,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:56:14,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:56:14,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:56:14,353 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=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:56:14,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:56:14,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:56:14,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:56:14,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:56:14,680 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:56:14,681 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-19 06:56:14,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb5e0653/3b1fda12ab5647fb8f5d62bea6b51e5e/FLAG847beadb3 [2020-08-19 06:56:15,255 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:56:15,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-19 06:56:15,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb5e0653/3b1fda12ab5647fb8f5d62bea6b51e5e/FLAG847beadb3 [2020-08-19 06:56:15,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbb5e0653/3b1fda12ab5647fb8f5d62bea6b51e5e [2020-08-19 06:56:15,626 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:56:15,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:56:15,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:15,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:56:15,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:56:15,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265a33a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15, skipping insertion in model container [2020-08-19 06:56:15,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:56:15,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:56:15,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:15,870 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:56:15,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:16,007 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:56:16,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16 WrapperNode [2020-08-19 06:56:16,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:16,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:56:16,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:56:16,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:56:16,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (1/1) ... [2020-08-19 06:56:16,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (1/1) ... [2020-08-19 06:56:16,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (1/1) ... [2020-08-19 06:56:16,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (1/1) ... [2020-08-19 06:56:16,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (1/1) ... [2020-08-19 06:56:16,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (1/1) ... [2020-08-19 06:56:16,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (1/1) ... [2020-08-19 06:56:16,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:56:16,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:56:16,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:56:16,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:56:16,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (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 [2020-08-19 06:56:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:56:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:56:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:56:16,120 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-19 06:56:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-19 06:56:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:56:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:56:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:56:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-19 06:56:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-19 06:56:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-19 06:56:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-19 06:56:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-19 06:56:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-19 06:56:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-19 06:56:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-19 06:56:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-19 06:56:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-19 06:56:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-19 06:56:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-19 06:56:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-19 06:56:16,126 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-19 06:56:16,126 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-19 06:56:16,126 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-19 06:56:16,126 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-19 06:56:16,126 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-19 06:56:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-19 06:56:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-19 06:56:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-19 06:56:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-19 06:56:16,127 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-19 06:56:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-19 06:56:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-19 06:56:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-19 06:56:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 06:56:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 06:56:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 06:56:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 06:56:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:56:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:56:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:56:16,564 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:56:16,565 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-19 06:56:16,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:16 BoogieIcfgContainer [2020-08-19 06:56:16,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:56:16,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:56:16,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:56:16,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:56:16,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:56:15" (1/3) ... [2020-08-19 06:56:16,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d5f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:16, skipping insertion in model container [2020-08-19 06:56:16,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:16" (2/3) ... [2020-08-19 06:56:16,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d5f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:16, skipping insertion in model container [2020-08-19 06:56:16,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:16" (3/3) ... [2020-08-19 06:56:16,578 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-19 06:56:16,598 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:56:16,608 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:56:16,623 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:56:16,657 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:56:16,657 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:56:16,657 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:56:16,657 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:56:16,657 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:56:16,658 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:56:16,658 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:56:16,658 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:56:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-08-19 06:56:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 06:56:16,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:16,685 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] [2020-08-19 06:56:16,685 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-08-19 06:56:16,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:16,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151743927] [2020-08-19 06:56:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-19 06:56:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:16,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151743927] [2020-08-19 06:56:16,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:16,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:56:16,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329727282] [2020-08-19 06:56:16,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:56:16,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:56:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:56:16,988 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2020-08-19 06:56:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:17,154 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-08-19 06:56:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:56:17,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 06:56:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:17,166 INFO L225 Difference]: With dead ends: 93 [2020-08-19 06:56:17,166 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 06:56:17,170 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 [2020-08-19 06:56:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 06:56:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-19 06:56:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 06:56:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-08-19 06:56:17,216 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-08-19 06:56:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:17,217 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-08-19 06:56:17,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:56:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-08-19 06:56:17,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 06:56:17,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:17,219 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] [2020-08-19 06:56:17,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:56:17,219 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-08-19 06:56:17,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:17,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715190107] [2020-08-19 06:56:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:17,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715190107] [2020-08-19 06:56:17,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:17,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:56:17,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311970729] [2020-08-19 06:56:17,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:56:17,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:56:17,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:56:17,340 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-08-19 06:56:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:17,476 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-08-19 06:56:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:56:17,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-08-19 06:56:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:17,478 INFO L225 Difference]: With dead ends: 78 [2020-08-19 06:56:17,479 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 06:56:17,480 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 [2020-08-19 06:56:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 06:56:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-08-19 06:56:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-19 06:56:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-08-19 06:56:17,502 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-08-19 06:56:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:17,503 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-08-19 06:56:17,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:56:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-08-19 06:56:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 06:56:17,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:17,505 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] [2020-08-19 06:56:17,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:56:17,505 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:17,506 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-08-19 06:56:17,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:17,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771618362] [2020-08-19 06:56:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:17,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771618362] [2020-08-19 06:56:17,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:17,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:56:17,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525362462] [2020-08-19 06:56:17,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:56:17,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:56:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:17,653 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-08-19 06:56:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:17,995 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-08-19 06:56:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:56:17,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-19 06:56:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:17,999 INFO L225 Difference]: With dead ends: 140 [2020-08-19 06:56:17,999 INFO L226 Difference]: Without dead ends: 91 [2020-08-19 06:56:18,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:56:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-19 06:56:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-08-19 06:56:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-19 06:56:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-08-19 06:56:18,022 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-08-19 06:56:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,023 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-08-19 06:56:18,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:56:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-08-19 06:56:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 06:56:18,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,024 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] [2020-08-19 06:56:18,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:56:18,025 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1743223006, now seen corresponding path program 1 times [2020-08-19 06:56:18,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706366397] [2020-08-19 06:56:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:18,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706366397] [2020-08-19 06:56:18,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:18,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:56:18,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978531483] [2020-08-19 06:56:18,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:18,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:18,157 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 7 states. [2020-08-19 06:56:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:18,394 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-08-19 06:56:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:56:18,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-19 06:56:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:18,396 INFO L225 Difference]: With dead ends: 136 [2020-08-19 06:56:18,397 INFO L226 Difference]: Without dead ends: 92 [2020-08-19 06:56:18,398 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 [2020-08-19 06:56:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-19 06:56:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-08-19 06:56:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 06:56:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-08-19 06:56:18,411 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 33 [2020-08-19 06:56:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,411 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-08-19 06:56:18,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-08-19 06:56:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 06:56:18,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,413 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] [2020-08-19 06:56:18,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:56:18,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1042158428, now seen corresponding path program 1 times [2020-08-19 06:56:18,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375729095] [2020-08-19 06:56:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:56:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:18,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375729095] [2020-08-19 06:56:18,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:18,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:56:18,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764445607] [2020-08-19 06:56:18,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:18,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:18,529 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 6 states. [2020-08-19 06:56:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:18,722 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2020-08-19 06:56:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:56:18,722 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-19 06:56:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:18,724 INFO L225 Difference]: With dead ends: 138 [2020-08-19 06:56:18,724 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 06:56:18,725 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 [2020-08-19 06:56:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 06:56:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-08-19 06:56:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 06:56:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-08-19 06:56:18,735 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 33 [2020-08-19 06:56:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,736 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-08-19 06:56:18,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-08-19 06:56:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-19 06:56:18,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,738 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] [2020-08-19 06:56:18,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:56:18,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash -151257089, now seen corresponding path program 1 times [2020-08-19 06:56:18,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251206912] [2020-08-19 06:56:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 06:56:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:18,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251206912] [2020-08-19 06:56:18,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:18,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:56:18,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409651881] [2020-08-19 06:56:18,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:56:18,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:18,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:56:18,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:18,815 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 5 states. [2020-08-19 06:56:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:18,916 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2020-08-19 06:56:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:56:18,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-19 06:56:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:18,918 INFO L225 Difference]: With dead ends: 124 [2020-08-19 06:56:18,919 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 06:56:18,919 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 [2020-08-19 06:56:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 06:56:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-08-19 06:56:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 06:56:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-08-19 06:56:18,929 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 35 [2020-08-19 06:56:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,929 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-08-19 06:56:18,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:56:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-08-19 06:56:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-19 06:56:18,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,931 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] [2020-08-19 06:56:18,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:56:18,931 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1172325443, now seen corresponding path program 1 times [2020-08-19 06:56:18,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183726680] [2020-08-19 06:56:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 06:56:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:19,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183726680] [2020-08-19 06:56:19,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:19,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:56:19,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370365769] [2020-08-19 06:56:19,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:19,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:19,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:19,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:19,002 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 7 states. [2020-08-19 06:56:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:19,152 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-08-19 06:56:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:56:19,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-08-19 06:56:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:19,153 INFO L225 Difference]: With dead ends: 147 [2020-08-19 06:56:19,154 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 06:56:19,154 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 [2020-08-19 06:56:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 06:56:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-08-19 06:56:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 06:56:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-08-19 06:56:19,176 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 35 [2020-08-19 06:56:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:19,177 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-08-19 06:56:19,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-08-19 06:56:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 06:56:19,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:19,180 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] [2020-08-19 06:56:19,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:56:19,181 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1310821647, now seen corresponding path program 1 times [2020-08-19 06:56:19,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:19,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759958104] [2020-08-19 06:56:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 06:56:19,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759958104] [2020-08-19 06:56:19,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:19,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:56:19,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539626629] [2020-08-19 06:56:19,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:56:19,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:56:19,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:19,322 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 8 states. [2020-08-19 06:56:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:19,569 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-08-19 06:56:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:56:19,569 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-08-19 06:56:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:19,571 INFO L225 Difference]: With dead ends: 107 [2020-08-19 06:56:19,571 INFO L226 Difference]: Without dead ends: 105 [2020-08-19 06:56:19,572 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 [2020-08-19 06:56:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-19 06:56:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-08-19 06:56:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-19 06:56:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-08-19 06:56:19,580 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 38 [2020-08-19 06:56:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:19,581 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-08-19 06:56:19,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:56:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-08-19 06:56:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 06:56:19,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:19,584 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] [2020-08-19 06:56:19,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:56:19,584 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:19,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:19,585 INFO L82 PathProgramCache]: Analyzing trace with hash 888728936, now seen corresponding path program 1 times [2020-08-19 06:56:19,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:19,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627338622] [2020-08-19 06:56:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:56:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:19,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627338622] [2020-08-19 06:56:19,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:19,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:56:19,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697908580] [2020-08-19 06:56:19,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:56:19,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:19,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:56:19,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:19,656 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 8 states. [2020-08-19 06:56:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:19,831 INFO L93 Difference]: Finished difference Result 209 states and 263 transitions. [2020-08-19 06:56:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:56:19,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 06:56:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:19,834 INFO L225 Difference]: With dead ends: 209 [2020-08-19 06:56:19,834 INFO L226 Difference]: Without dead ends: 136 [2020-08-19 06:56:19,835 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 [2020-08-19 06:56:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-19 06:56:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2020-08-19 06:56:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-19 06:56:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-08-19 06:56:19,843 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 40 [2020-08-19 06:56:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:19,844 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-08-19 06:56:19,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:56:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-08-19 06:56:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 06:56:19,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:19,846 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] [2020-08-19 06:56:19,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:56:19,846 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 2 times [2020-08-19 06:56:19,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:19,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984259338] [2020-08-19 06:56:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 06:56:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:20,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984259338] [2020-08-19 06:56:20,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:20,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:56:20,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65545435] [2020-08-19 06:56:20,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:56:20,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:20,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:56:20,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:56:20,019 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 12 states. [2020-08-19 06:56:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:20,597 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-08-19 06:56:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:56:20,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-08-19 06:56:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:20,601 INFO L225 Difference]: With dead ends: 240 [2020-08-19 06:56:20,601 INFO L226 Difference]: Without dead ends: 189 [2020-08-19 06:56:20,603 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 [2020-08-19 06:56:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-19 06:56:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-08-19 06:56:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-19 06:56:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2020-08-19 06:56:20,614 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 45 [2020-08-19 06:56:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:20,614 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2020-08-19 06:56:20,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:56:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2020-08-19 06:56:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 06:56:20,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:20,619 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] [2020-08-19 06:56:20,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:56:20,619 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-08-19 06:56:20,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:20,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239653226] [2020-08-19 06:56:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:20,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:20,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 06:56:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:20,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239653226] [2020-08-19 06:56:20,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:20,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:56:20,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586809616] [2020-08-19 06:56:20,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:56:20,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:20,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:56:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:56:20,810 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand 11 states. [2020-08-19 06:56:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:21,197 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-08-19 06:56:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:56:21,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-19 06:56:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:21,201 INFO L225 Difference]: With dead ends: 202 [2020-08-19 06:56:21,201 INFO L226 Difference]: Without dead ends: 200 [2020-08-19 06:56:21,202 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 [2020-08-19 06:56:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-19 06:56:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2020-08-19 06:56:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-19 06:56:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 187 transitions. [2020-08-19 06:56:21,219 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 187 transitions. Word has length 45 [2020-08-19 06:56:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:21,220 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 187 transitions. [2020-08-19 06:56:21,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:56:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 187 transitions. [2020-08-19 06:56:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 06:56:21,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:21,232 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] [2020-08-19 06:56:21,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:56:21,233 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-08-19 06:56:21,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:21,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298810824] [2020-08-19 06:56:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:56:21,271 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:56:21,272 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:56:21,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:56:21,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:56:21 BoogieIcfgContainer [2020-08-19 06:56:21,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:56:21,303 INFO L168 Benchmark]: Toolchain (without parser) took 5674.52 ms. Allocated memory was 141.0 MB in the beginning and 274.2 MB in the end (delta: 133.2 MB). Free memory was 103.0 MB in the beginning and 111.3 MB in the end (delta: -8.3 MB). Peak memory consumption was 124.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:21,304 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:56:21,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.46 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 102.8 MB in the beginning and 181.6 MB in the end (delta: -78.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:21,311 INFO L168 Benchmark]: Boogie Preprocessor took 51.34 ms. Allocated memory is still 204.5 MB. Free memory was 181.6 MB in the beginning and 178.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:21,312 INFO L168 Benchmark]: RCFGBuilder took 509.47 ms. Allocated memory is still 204.5 MB. Free memory was 178.7 MB in the beginning and 151.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:21,314 INFO L168 Benchmark]: TraceAbstraction took 4729.88 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 150.7 MB in the beginning and 111.3 MB in the end (delta: 39.4 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:21,325 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 379.46 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 102.8 MB in the beginning and 181.6 MB in the end (delta: -78.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.34 ms. Allocated memory is still 204.5 MB. Free memory was 181.6 MB in the beginning and 178.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 509.47 ms. Allocated memory is still 204.5 MB. Free memory was 178.7 MB in the beginning and 151.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4729.88 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 150.7 MB in the beginning and 111.3 MB in the end (delta: 39.4 MB). Peak memory consumption was 109.1 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: 4.6s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 901 SDslu, 1287 SDs, 0 SdLazy, 1834 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s 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...