/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -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-c90d42b [2020-09-24 15:07:45,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:07:45,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:07:45,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:07:45,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:07:45,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:07:45,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:07:45,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:07:45,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:07:45,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:07:45,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:07:45,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:07:45,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:07:45,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:07:45,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:07:45,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:07:45,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:07:45,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:07:45,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:07:45,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:07:46,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:07:46,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:07:46,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:07:46,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:07:46,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:07:46,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:07:46,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:07:46,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:07:46,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:07:46,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:07:46,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:07:46,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:07:46,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:07:46,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:07:46,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:07:46,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:07:46,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:07:46,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:07:46,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:07:46,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:07:46,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:07:46,035 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 [2020-09-24 15:07:46,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:07:46,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:07:46,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:07:46,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:07:46,092 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:07:46,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:07:46,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:07:46,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:07:46,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:07:46,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:07:46,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:07:46,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:07:46,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:07:46,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:07:46,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:07:46,094 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:07:46,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:07:46,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:07:46,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:07:46,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:07:46,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:07:46,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:07:46,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:07:46,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:07:46,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:07:46,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:07:46,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:07:46,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:07:46,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:07:46,097 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:07:46,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:07:46,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:07:46,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:07:46,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:07:46,643 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:07:46,645 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 15:07:46,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f70fd9bd/69ecd6cd90914287b81ea030a4f75d7a/FLAGd1f8b8a43 [2020-09-24 15:07:47,329 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:07:47,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 15:07:47,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f70fd9bd/69ecd6cd90914287b81ea030a4f75d7a/FLAGd1f8b8a43 [2020-09-24 15:07:47,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f70fd9bd/69ecd6cd90914287b81ea030a4f75d7a [2020-09-24 15:07:47,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:07:47,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:07:47,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:47,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:07:47,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:07:47,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:47" (1/1) ... [2020-09-24 15:07:47,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa7080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:47, skipping insertion in model container [2020-09-24 15:07:47,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:47" (1/1) ... [2020-09-24 15:07:47,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:07:47,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:07:47,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:47,997 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:07:48,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:48,150 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:07:48,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48 WrapperNode [2020-09-24 15:07:48,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:48,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:07:48,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:07:48,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:07:48,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (1/1) ... [2020-09-24 15:07:48,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:07:48,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:07:48,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:07:48,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:07:48,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (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 [2020-09-24 15:07:48,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:07:48,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:07:48,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:07:48,285 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-24 15:07:48,285 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-24 15:07:48,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:07:48,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:07:48,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:07:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-24 15:07:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-24 15:07:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-24 15:07:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-24 15:07:48,286 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-24 15:07:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-24 15:07:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-24 15:07:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-24 15:07:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-24 15:07:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-24 15:07:48,287 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-24 15:07:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-24 15:07:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-24 15:07:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-24 15:07:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-24 15:07:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-24 15:07:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-24 15:07:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-24 15:07:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-24 15:07:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-24 15:07:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-24 15:07:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-24 15:07:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-24 15:07:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-24 15:07:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-24 15:07:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-24 15:07:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 15:07:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 15:07:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 15:07:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 15:07:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:07:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:07:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:07:48,760 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:07:48,760 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 15:07:48,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:48 BoogieIcfgContainer [2020-09-24 15:07:48,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:07:48,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:07:48,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:07:48,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:07:48,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:07:47" (1/3) ... [2020-09-24 15:07:48,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1570d46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:48, skipping insertion in model container [2020-09-24 15:07:48,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:48" (2/3) ... [2020-09-24 15:07:48,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1570d46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:48, skipping insertion in model container [2020-09-24 15:07:48,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:48" (3/3) ... [2020-09-24 15:07:48,778 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 15:07:48,790 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:07:48,801 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:07:48,822 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:07:48,850 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:07:48,850 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:07:48,850 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:07:48,851 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:07:48,851 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:07:48,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:07:48,851 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:07:48,851 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:07:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-09-24 15:07:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 15:07:48,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:48,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:48,889 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-09-24 15:07:48,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:48,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157886773] [2020-09-24 15:07:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:07:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:49,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157886773] [2020-09-24 15:07:49,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:49,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 15:07:49,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101556097] [2020-09-24 15:07:49,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 15:07:49,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 15:07:49,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 15:07:49,246 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-09-24 15:07:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:49,534 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2020-09-24 15:07:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 15:07:49,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-09-24 15:07:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:49,550 INFO L225 Difference]: With dead ends: 227 [2020-09-24 15:07:49,550 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 15:07:49,555 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 [2020-09-24 15:07:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 15:07:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-09-24 15:07:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 15:07:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-09-24 15:07:49,618 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 48 [2020-09-24 15:07:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:49,619 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-09-24 15:07:49,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 15:07:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-09-24 15:07:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 15:07:49,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:49,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:49,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:07:49,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:49,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1227098254, now seen corresponding path program 1 times [2020-09-24 15:07:49,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:49,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544383468] [2020-09-24 15:07:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 15:07:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:49,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544383468] [2020-09-24 15:07:49,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:49,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:07:49,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410702409] [2020-09-24 15:07:49,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:07:49,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:49,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:07:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:07:49,803 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 4 states. [2020-09-24 15:07:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:50,014 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-09-24 15:07:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:07:50,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-09-24 15:07:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:50,017 INFO L225 Difference]: With dead ends: 189 [2020-09-24 15:07:50,017 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 15:07:50,019 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 [2020-09-24 15:07:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 15:07:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-24 15:07:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 15:07:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-09-24 15:07:50,031 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 60 [2020-09-24 15:07:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:50,032 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-09-24 15:07:50,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:07:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-09-24 15:07:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 15:07:50,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:50,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:50,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:07:50,035 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1578191403, now seen corresponding path program 1 times [2020-09-24 15:07:50,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:50,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435698060] [2020-09-24 15:07:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 15:07:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:50,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435698060] [2020-09-24 15:07:50,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:50,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:07:50,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242324684] [2020-09-24 15:07:50,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:07:50,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:50,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:07:50,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:50,261 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 8 states. [2020-09-24 15:07:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:50,662 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2020-09-24 15:07:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:07:50,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 15:07:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:50,669 INFO L225 Difference]: With dead ends: 365 [2020-09-24 15:07:50,669 INFO L226 Difference]: Without dead ends: 275 [2020-09-24 15:07:50,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:07:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-24 15:07:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 140. [2020-09-24 15:07:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-24 15:07:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2020-09-24 15:07:50,695 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 62 [2020-09-24 15:07:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:50,696 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2020-09-24 15:07:50,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:07:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2020-09-24 15:07:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 15:07:50,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:50,703 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:50,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:07:50,704 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:50,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-09-24 15:07:50,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:50,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995879897] [2020-09-24 15:07:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 15:07:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:51,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995879897] [2020-09-24 15:07:51,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:51,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:07:51,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757974928] [2020-09-24 15:07:51,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:07:51,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:07:51,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:07:51,007 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand 10 states. [2020-09-24 15:07:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:51,570 INFO L93 Difference]: Finished difference Result 430 states and 486 transitions. [2020-09-24 15:07:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:07:51,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-09-24 15:07:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:51,574 INFO L225 Difference]: With dead ends: 430 [2020-09-24 15:07:51,574 INFO L226 Difference]: Without dead ends: 340 [2020-09-24 15:07:51,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:07:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-24 15:07:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 144. [2020-09-24 15:07:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 15:07:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-09-24 15:07:51,607 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 65 [2020-09-24 15:07:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:51,607 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-09-24 15:07:51,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:07:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-09-24 15:07:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 15:07:51,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:51,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:51,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:07:51,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:51,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1492663361, now seen corresponding path program 1 times [2020-09-24 15:07:51,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:51,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920798535] [2020-09-24 15:07:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 15:07:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:51,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920798535] [2020-09-24 15:07:51,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:51,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:07:51,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290259209] [2020-09-24 15:07:51,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:07:51,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:07:51,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:07:51,695 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 4 states. [2020-09-24 15:07:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:51,881 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2020-09-24 15:07:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:07:51,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-09-24 15:07:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:51,884 INFO L225 Difference]: With dead ends: 233 [2020-09-24 15:07:51,884 INFO L226 Difference]: Without dead ends: 145 [2020-09-24 15:07:51,885 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 [2020-09-24 15:07:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-24 15:07:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-09-24 15:07:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-24 15:07:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-09-24 15:07:51,894 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 65 [2020-09-24 15:07:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:51,894 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-09-24 15:07:51,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:07:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-09-24 15:07:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 15:07:51,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:51,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:51,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:07:51,897 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1492389340, now seen corresponding path program 1 times [2020-09-24 15:07:51,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:51,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851674970] [2020-09-24 15:07:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 15:07:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:52,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851674970] [2020-09-24 15:07:52,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:52,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:07:52,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027047634] [2020-09-24 15:07:52,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:07:52,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:52,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:07:52,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:07:52,173 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 10 states. [2020-09-24 15:07:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:52,682 INFO L93 Difference]: Finished difference Result 388 states and 434 transitions. [2020-09-24 15:07:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:07:52,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-09-24 15:07:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:52,685 INFO L225 Difference]: With dead ends: 388 [2020-09-24 15:07:52,685 INFO L226 Difference]: Without dead ends: 285 [2020-09-24 15:07:52,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-09-24 15:07:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-09-24 15:07:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 155. [2020-09-24 15:07:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-24 15:07:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2020-09-24 15:07:52,695 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 67 [2020-09-24 15:07:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:52,695 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2020-09-24 15:07:52,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:07:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2020-09-24 15:07:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 15:07:52,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:52,697 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:52,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:07:52,698 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash 122758570, now seen corresponding path program 1 times [2020-09-24 15:07:52,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:52,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989242494] [2020-09-24 15:07:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 15:07:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:52,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989242494] [2020-09-24 15:07:52,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:52,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 15:07:52,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835033129] [2020-09-24 15:07:52,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:07:52,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:52,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:07:52,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:07:52,879 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand 12 states. [2020-09-24 15:07:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:53,535 INFO L93 Difference]: Finished difference Result 425 states and 477 transitions. [2020-09-24 15:07:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:07:53,536 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-09-24 15:07:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:53,542 INFO L225 Difference]: With dead ends: 425 [2020-09-24 15:07:53,542 INFO L226 Difference]: Without dead ends: 322 [2020-09-24 15:07:53,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:07:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-24 15:07:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 136. [2020-09-24 15:07:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-24 15:07:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2020-09-24 15:07:53,556 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 70 [2020-09-24 15:07:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:53,557 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2020-09-24 15:07:53,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:07:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2020-09-24 15:07:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 15:07:53,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:53,563 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:53,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:07:53,563 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash -272178825, now seen corresponding path program 1 times [2020-09-24 15:07:53,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:53,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533641913] [2020-09-24 15:07:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:07:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:53,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533641913] [2020-09-24 15:07:53,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:53,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:07:53,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829497769] [2020-09-24 15:07:53,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:07:53,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:53,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:07:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:07:53,656 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand 4 states. [2020-09-24 15:07:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:53,827 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2020-09-24 15:07:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:07:53,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-09-24 15:07:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:53,833 INFO L225 Difference]: With dead ends: 226 [2020-09-24 15:07:53,833 INFO L226 Difference]: Without dead ends: 137 [2020-09-24 15:07:53,834 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 [2020-09-24 15:07:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-24 15:07:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-09-24 15:07:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-24 15:07:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-09-24 15:07:53,840 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 72 [2020-09-24 15:07:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:53,841 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-09-24 15:07:53,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:07:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-09-24 15:07:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 15:07:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:53,844 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:53,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:07:53,847 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 588909148, now seen corresponding path program 1 times [2020-09-24 15:07:53,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:53,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464066179] [2020-09-24 15:07:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-24 15:07:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:54,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464066179] [2020-09-24 15:07:54,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:54,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:07:54,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628519373] [2020-09-24 15:07:54,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:07:54,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:07:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:07:54,017 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 10 states. [2020-09-24 15:07:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:54,632 INFO L93 Difference]: Finished difference Result 389 states and 436 transitions. [2020-09-24 15:07:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:07:54,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-09-24 15:07:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:54,635 INFO L225 Difference]: With dead ends: 389 [2020-09-24 15:07:54,635 INFO L226 Difference]: Without dead ends: 296 [2020-09-24 15:07:54,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:07:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-09-24 15:07:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-09-24 15:07:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 15:07:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2020-09-24 15:07:54,648 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 72 [2020-09-24 15:07:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:54,649 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2020-09-24 15:07:54,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:07:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2020-09-24 15:07:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 15:07:54,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:54,650 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:54,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:07:54,651 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash 69190993, now seen corresponding path program 1 times [2020-09-24 15:07:54,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:54,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549116248] [2020-09-24 15:07:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-24 15:07:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 15:07:54,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549116248] [2020-09-24 15:07:54,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:54,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:07:54,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814647961] [2020-09-24 15:07:54,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:07:54,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:07:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:54,784 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand 8 states. [2020-09-24 15:07:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:55,168 INFO L93 Difference]: Finished difference Result 288 states and 323 transitions. [2020-09-24 15:07:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:07:55,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-09-24 15:07:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:55,172 INFO L225 Difference]: With dead ends: 288 [2020-09-24 15:07:55,172 INFO L226 Difference]: Without dead ends: 286 [2020-09-24 15:07:55,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:07:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-24 15:07:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 254. [2020-09-24 15:07:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-09-24 15:07:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2020-09-24 15:07:55,183 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 73 [2020-09-24 15:07:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:55,183 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2020-09-24 15:07:55,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:07:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2020-09-24 15:07:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 15:07:55,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:55,186 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:55,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:07:55,186 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1474625812, now seen corresponding path program 1 times [2020-09-24 15:07:55,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:55,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209162874] [2020-09-24 15:07:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-24 15:07:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:55,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209162874] [2020-09-24 15:07:55,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:55,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:07:55,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642327102] [2020-09-24 15:07:55,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:07:55,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:07:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:07:55,346 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 12 states. [2020-09-24 15:07:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:56,187 INFO L93 Difference]: Finished difference Result 460 states and 517 transitions. [2020-09-24 15:07:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:07:56,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-24 15:07:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:56,198 INFO L225 Difference]: With dead ends: 460 [2020-09-24 15:07:56,198 INFO L226 Difference]: Without dead ends: 367 [2020-09-24 15:07:56,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:07:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-09-24 15:07:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 258. [2020-09-24 15:07:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-24 15:07:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-09-24 15:07:56,223 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 75 [2020-09-24 15:07:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:56,223 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-09-24 15:07:56,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:07:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-09-24 15:07:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 15:07:56,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:56,226 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:56,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:07:56,227 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1908172287, now seen corresponding path program 1 times [2020-09-24 15:07:56,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:56,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77629268] [2020-09-24 15:07:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:07:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 15:07:56,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77629268] [2020-09-24 15:07:56,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:56,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:07:56,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070545975] [2020-09-24 15:07:56,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:07:56,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:56,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:07:56,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:56,379 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 8 states. [2020-09-24 15:07:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:56,885 INFO L93 Difference]: Finished difference Result 432 states and 485 transitions. [2020-09-24 15:07:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:07:56,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-09-24 15:07:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:56,888 INFO L225 Difference]: With dead ends: 432 [2020-09-24 15:07:56,888 INFO L226 Difference]: Without dead ends: 339 [2020-09-24 15:07:56,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:07:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-09-24 15:07:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 258. [2020-09-24 15:07:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-24 15:07:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-09-24 15:07:56,902 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 76 [2020-09-24 15:07:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:56,902 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-09-24 15:07:56,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:07:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-09-24 15:07:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 15:07:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:56,904 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:56,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:07:56,904 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 116425250, now seen corresponding path program 1 times [2020-09-24 15:07:56,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:56,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664830527] [2020-09-24 15:07:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:07:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 15:07:56,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664830527] [2020-09-24 15:07:56,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:56,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:07:56,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310344043] [2020-09-24 15:07:56,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:07:56,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:56,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:07:56,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:07:56,987 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 5 states. [2020-09-24 15:07:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:57,181 INFO L93 Difference]: Finished difference Result 360 states and 403 transitions. [2020-09-24 15:07:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:07:57,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-09-24 15:07:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:57,183 INFO L225 Difference]: With dead ends: 360 [2020-09-24 15:07:57,183 INFO L226 Difference]: Without dead ends: 271 [2020-09-24 15:07:57,184 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 [2020-09-24 15:07:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-09-24 15:07:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 260. [2020-09-24 15:07:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-24 15:07:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2020-09-24 15:07:57,194 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 76 [2020-09-24 15:07:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:57,194 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2020-09-24 15:07:57,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:07:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2020-09-24 15:07:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-24 15:07:57,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:57,197 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:57,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:07:57,197 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:57,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1122457453, now seen corresponding path program 1 times [2020-09-24 15:07:57,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:57,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846327906] [2020-09-24 15:07:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:07:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 15:07:57,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846327906] [2020-09-24 15:07:57,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:57,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:07:57,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180542289] [2020-09-24 15:07:57,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:07:57,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:07:57,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:07:57,276 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand 6 states. [2020-09-24 15:07:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:57,539 INFO L93 Difference]: Finished difference Result 411 states and 459 transitions. [2020-09-24 15:07:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 15:07:57,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-09-24 15:07:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:57,545 INFO L225 Difference]: With dead ends: 411 [2020-09-24 15:07:57,545 INFO L226 Difference]: Without dead ends: 297 [2020-09-24 15:07:57,547 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 [2020-09-24 15:07:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-24 15:07:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 253. [2020-09-24 15:07:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-09-24 15:07:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 281 transitions. [2020-09-24 15:07:57,562 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 281 transitions. Word has length 77 [2020-09-24 15:07:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:57,563 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 281 transitions. [2020-09-24 15:07:57,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:07:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 281 transitions. [2020-09-24 15:07:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 15:07:57,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:57,565 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:57,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:07:57,566 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:57,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2031617893, now seen corresponding path program 1 times [2020-09-24 15:07:57,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:57,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838588692] [2020-09-24 15:07:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-24 15:07:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 15:07:57,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838588692] [2020-09-24 15:07:57,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:57,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:07:57,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795764284] [2020-09-24 15:07:57,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:07:57,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:07:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:57,676 INFO L87 Difference]: Start difference. First operand 253 states and 281 transitions. Second operand 8 states. [2020-09-24 15:07:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:58,127 INFO L93 Difference]: Finished difference Result 521 states and 577 transitions. [2020-09-24 15:07:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:07:58,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-09-24 15:07:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:58,129 INFO L225 Difference]: With dead ends: 521 [2020-09-24 15:07:58,129 INFO L226 Difference]: Without dead ends: 331 [2020-09-24 15:07:58,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:07:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-09-24 15:07:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 264. [2020-09-24 15:07:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-24 15:07:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-09-24 15:07:58,141 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 292 transitions. Word has length 78 [2020-09-24 15:07:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:58,142 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-09-24 15:07:58,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:07:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 292 transitions. [2020-09-24 15:07:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 15:07:58,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:58,144 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:58,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:07:58,144 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1446971750, now seen corresponding path program 1 times [2020-09-24 15:07:58,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:58,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603402916] [2020-09-24 15:07:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:07:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:58,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603402916] [2020-09-24 15:07:58,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:58,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:07:58,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410169903] [2020-09-24 15:07:58,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:07:58,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:58,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:07:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:07:58,255 INFO L87 Difference]: Start difference. First operand 264 states and 292 transitions. Second operand 10 states. [2020-09-24 15:07:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:58,742 INFO L93 Difference]: Finished difference Result 599 states and 665 transitions. [2020-09-24 15:07:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:07:58,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-09-24 15:07:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:58,749 INFO L225 Difference]: With dead ends: 599 [2020-09-24 15:07:58,749 INFO L226 Difference]: Without dead ends: 435 [2020-09-24 15:07:58,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:07:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-09-24 15:07:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 355. [2020-09-24 15:07:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-09-24 15:07:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 393 transitions. [2020-09-24 15:07:58,767 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 393 transitions. Word has length 79 [2020-09-24 15:07:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:58,767 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 393 transitions. [2020-09-24 15:07:58,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:07:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 393 transitions. [2020-09-24 15:07:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-24 15:07:58,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:58,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:58,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 15:07:58,769 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:58,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1140392269, now seen corresponding path program 2 times [2020-09-24 15:07:58,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:58,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233844703] [2020-09-24 15:07:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 15:07:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:58,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233844703] [2020-09-24 15:07:58,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:58,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:07:58,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29126726] [2020-09-24 15:07:58,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:07:58,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:58,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:07:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:07:58,923 INFO L87 Difference]: Start difference. First operand 355 states and 393 transitions. Second operand 12 states. [2020-09-24 15:07:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:59,652 INFO L93 Difference]: Finished difference Result 694 states and 770 transitions. [2020-09-24 15:07:59,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:07:59,653 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-09-24 15:07:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:59,657 INFO L225 Difference]: With dead ends: 694 [2020-09-24 15:07:59,657 INFO L226 Difference]: Without dead ends: 525 [2020-09-24 15:07:59,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:07:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-09-24 15:07:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 390. [2020-09-24 15:07:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-09-24 15:07:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 432 transitions. [2020-09-24 15:07:59,677 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 432 transitions. Word has length 82 [2020-09-24 15:07:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:59,677 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 432 transitions. [2020-09-24 15:07:59,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:07:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 432 transitions. [2020-09-24 15:07:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 15:07:59,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:59,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:59,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 15:07:59,680 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1836590973, now seen corresponding path program 2 times [2020-09-24 15:07:59,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:59,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513306330] [2020-09-24 15:07:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:59,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:59,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-24 15:07:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:59,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513306330] [2020-09-24 15:07:59,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:59,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 15:07:59,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113436420] [2020-09-24 15:07:59,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 15:07:59,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:59,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 15:07:59,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:07:59,852 INFO L87 Difference]: Start difference. First operand 390 states and 432 transitions. Second operand 14 states. [2020-09-24 15:08:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:00,822 INFO L93 Difference]: Finished difference Result 680 states and 754 transitions. [2020-09-24 15:08:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 15:08:00,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-09-24 15:08:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:00,826 INFO L225 Difference]: With dead ends: 680 [2020-09-24 15:08:00,826 INFO L226 Difference]: Without dead ends: 428 [2020-09-24 15:08:00,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-09-24 15:08:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-09-24 15:08:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 247. [2020-09-24 15:08:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-09-24 15:08:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 270 transitions. [2020-09-24 15:08:00,842 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 270 transitions. Word has length 85 [2020-09-24 15:08:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:00,843 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 270 transitions. [2020-09-24 15:08:00,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 15:08:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 270 transitions. [2020-09-24 15:08:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 15:08:00,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:00,844 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:00,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 15:08:00,845 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:00,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1723821108, now seen corresponding path program 2 times [2020-09-24 15:08:00,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:00,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973562430] [2020-09-24 15:08:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:00,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:00,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 15:08:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-24 15:08:00,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973562430] [2020-09-24 15:08:00,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:00,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:08:00,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254783980] [2020-09-24 15:08:00,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:08:00,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:08:00,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:00,924 INFO L87 Difference]: Start difference. First operand 247 states and 270 transitions. Second operand 6 states. [2020-09-24 15:08:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:01,174 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2020-09-24 15:08:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:01,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-09-24 15:08:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:01,177 INFO L225 Difference]: With dead ends: 387 [2020-09-24 15:08:01,177 INFO L226 Difference]: Without dead ends: 290 [2020-09-24 15:08:01,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-24 15:08:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 247. [2020-09-24 15:08:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-09-24 15:08:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 269 transitions. [2020-09-24 15:08:01,186 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 269 transitions. Word has length 90 [2020-09-24 15:08:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:01,187 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 269 transitions. [2020-09-24 15:08:01,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:08:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 269 transitions. [2020-09-24 15:08:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-24 15:08:01,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:01,188 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:01,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 15:08:01,189 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash 888855281, now seen corresponding path program 1 times [2020-09-24 15:08:01,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:01,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708173888] [2020-09-24 15:08:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 15:08:01,219 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 15:08:01,220 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 15:08:01,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 15:08:01,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:08:01 BoogieIcfgContainer [2020-09-24 15:08:01,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:08:01,260 INFO L168 Benchmark]: Toolchain (without parser) took 13607.71 ms. Allocated memory was 138.4 MB in the beginning and 350.7 MB in the end (delta: 212.3 MB). Free memory was 101.1 MB in the beginning and 143.7 MB in the end (delta: -42.6 MB). Peak memory consumption was 169.8 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:01,265 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:08:01,266 INFO L168 Benchmark]: CACSL2BoogieTranslator took 491.15 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.4 MB in the beginning and 178.4 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:01,268 INFO L168 Benchmark]: Boogie Preprocessor took 52.49 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 176.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:01,269 INFO L168 Benchmark]: RCFGBuilder took 563.01 ms. Allocated memory is still 201.3 MB. Free memory was 176.3 MB in the beginning and 143.5 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:01,270 INFO L168 Benchmark]: TraceAbstraction took 12487.09 ms. Allocated memory was 201.3 MB in the beginning and 350.7 MB in the end (delta: 149.4 MB). Free memory was 142.8 MB in the beginning and 143.7 MB in the end (delta: -820.5 kB). Peak memory consumption was 148.6 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:01,277 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 491.15 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.4 MB in the beginning and 178.4 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.49 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 176.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 563.01 ms. Allocated memory is still 201.3 MB. Free memory was 176.3 MB in the beginning and 143.5 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12487.09 ms. Allocated memory was 201.3 MB in the beginning and 350.7 MB in the end (delta: 149.4 MB). Free memory was 142.8 MB in the beginning and 143.7 MB in the end (delta: -820.5 kB). Peak memory consumption was 148.6 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, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.3s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2567 SDtfs, 3630 SDslu, 9320 SDs, 0 SdLazy, 6170 SolverSat, 276 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 323 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 1526 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 1464 NumberOfCodeBlocks, 1464 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1353 ConstructedInterpolants, 0 QuantifiedInterpolants, 257869 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 14 PerfectInterpolantSequences, 60/100 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...