/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/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:07:44,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:07:44,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:07:44,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:07:44,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:07:44,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:07:44,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:07:44,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:07:44,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:07:44,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:07:44,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:07:44,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:07:44,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:07:44,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:07:44,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:07:44,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:07:44,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:07:44,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:07:44,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:07:44,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:07:44,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:07:44,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:07:44,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:07:44,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:07:44,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 15:07:44,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 15:07:44,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 15:07:44,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 15:07:44,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 15:07:44,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 15:07:44,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 15:07:44,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 15:07:44,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 15:07:44,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 15:07:44,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 15:07:44,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 15:07:44,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 15:07:44,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 15:07:44,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:07:44,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:07:44,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:07:44,823 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 15:07:44,850 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:07:44,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:07:44,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:07:44,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:07:44,852 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:07:44,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:07:44,853 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:07:44,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:07:44,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:07:44,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:07:44,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:07:44,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:07:44,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:07:44,854 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:07:44,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:07:44,854 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:07:44,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:07:44,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:07:44,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:07:44,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:07:44,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:07:44,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:07:44,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:07:44,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:07:44,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:07:44,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:07:44,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:07:44,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:07:44,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:07:44,857 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 15:07:45,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:07:45,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:07:45,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:07:45,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:07:45,354 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:07:45,355 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 15:07:45,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21442a53/2ee08baa59b34fc0bca3d02ed1202933/FLAG68b1e8b9d [2020-09-24 15:07:46,023 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:07:46,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 15:07:46,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21442a53/2ee08baa59b34fc0bca3d02ed1202933/FLAG68b1e8b9d [2020-09-24 15:07:46,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21442a53/2ee08baa59b34fc0bca3d02ed1202933 [2020-09-24 15:07:46,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:07:46,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:07:46,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:46,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:07:46,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:07:46,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d228d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46, skipping insertion in model container [2020-09-24 15:07:46,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:07:46,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:07:46,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:46,692 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:07:46,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:46,841 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:07:46,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46 WrapperNode [2020-09-24 15:07:46,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:46,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:07:46,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:07:46,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:07:46,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (1/1) ... [2020-09-24 15:07:46,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:07:46,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:07:46,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:07:46,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:07:46,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (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 15:07:46,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:07:46,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:07:46,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:07:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-24 15:07:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-24 15:07:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:07:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:07:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 15:07:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:07:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-24 15:07:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-24 15:07:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-24 15:07:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-24 15:07:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-24 15:07:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-24 15:07:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-24 15:07:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-24 15:07:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-24 15:07:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-24 15:07:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-24 15:07:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-24 15:07:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-24 15:07:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-24 15:07:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-24 15:07:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-24 15:07:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-24 15:07:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-24 15:07:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-24 15:07:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-24 15:07:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-24 15:07:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-24 15:07:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-24 15:07:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-24 15:07:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-24 15:07:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-24 15:07:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 15:07:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 15:07:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 15:07:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 15:07:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:07:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:07:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:07:47,506 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:07:47,507 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 15:07:47,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:47 BoogieIcfgContainer [2020-09-24 15:07:47,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:07:47,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:07:47,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:07:47,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:07:47,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:07:46" (1/3) ... [2020-09-24 15:07:47,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715ae354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:47, skipping insertion in model container [2020-09-24 15:07:47,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:46" (2/3) ... [2020-09-24 15:07:47,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715ae354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:47, skipping insertion in model container [2020-09-24 15:07:47,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:47" (3/3) ... [2020-09-24 15:07:47,524 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-24 15:07:47,537 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:07:47,548 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:07:47,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:07:47,601 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:07:47,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:07:47,601 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:07:47,601 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:07:47,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:07:47,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:07:47,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:07:47,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:07:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-09-24 15:07:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 15:07:47,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:47,644 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] [2020-09-24 15:07:47,644 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash 593727157, now seen corresponding path program 1 times [2020-09-24 15:07:47,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:47,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190940009] [2020-09-24 15:07:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:47,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 15:07:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:47,924 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 15:07:47,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190940009] [2020-09-24 15:07:47,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:47,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 15:07:47,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666894028] [2020-09-24 15:07:47,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 15:07:47,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 15:07:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 15:07:47,959 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-09-24 15:07:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:48,313 INFO L93 Difference]: Finished difference Result 254 states and 290 transitions. [2020-09-24 15:07:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 15:07:48,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-09-24 15:07:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:48,329 INFO L225 Difference]: With dead ends: 254 [2020-09-24 15:07:48,330 INFO L226 Difference]: Without dead ends: 111 [2020-09-24 15:07:48,336 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 15:07:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-24 15:07:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-09-24 15:07:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-24 15:07:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-09-24 15:07:48,415 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 51 [2020-09-24 15:07:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:48,415 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-09-24 15:07:48,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 15:07:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-09-24 15:07:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 15:07:48,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:48,419 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] [2020-09-24 15:07:48,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:07:48,420 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1128985001, now seen corresponding path program 1 times [2020-09-24 15:07:48,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:48,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213515097] [2020-09-24 15:07:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:07:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,558 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 15:07:48,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213515097] [2020-09-24 15:07:48,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:48,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:07:48,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817807451] [2020-09-24 15:07:48,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:07:48,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:48,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:07:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:07:48,565 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 4 states. [2020-09-24 15:07:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:48,813 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2020-09-24 15:07:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:07:48,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-09-24 15:07:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:48,816 INFO L225 Difference]: With dead ends: 212 [2020-09-24 15:07:48,816 INFO L226 Difference]: Without dead ends: 117 [2020-09-24 15:07:48,818 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 15:07:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-24 15:07:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-09-24 15:07:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-24 15:07:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-09-24 15:07:48,830 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 63 [2020-09-24 15:07:48,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:48,830 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-09-24 15:07:48,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:07:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-09-24 15:07:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 15:07:48,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:48,832 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 15:07:48,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:07:48,833 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:48,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1210839627, now seen corresponding path program 1 times [2020-09-24 15:07:48,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:48,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575801645] [2020-09-24 15:07:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-24 15:07:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:48,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575801645] [2020-09-24 15:07:48,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:48,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 15:07:48,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795034088] [2020-09-24 15:07:48,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:07:48,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:07:48,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:07:48,955 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 6 states. [2020-09-24 15:07:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:49,213 INFO L93 Difference]: Finished difference Result 219 states and 239 transitions. [2020-09-24 15:07:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:07:49,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-09-24 15:07:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:49,215 INFO L225 Difference]: With dead ends: 219 [2020-09-24 15:07:49,215 INFO L226 Difference]: Without dead ends: 124 [2020-09-24 15:07:49,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-24 15:07:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-09-24 15:07:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-24 15:07:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-09-24 15:07:49,227 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 70 [2020-09-24 15:07:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:49,228 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-09-24 15:07:49,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:07:49,228 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-09-24 15:07:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-24 15:07:49,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:49,230 INFO L422 BasicCegarLoop]: trace histogram [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 15:07:49,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:07:49,231 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:49,231 INFO L82 PathProgramCache]: Analyzing trace with hash -257337495, now seen corresponding path program 2 times [2020-09-24 15:07:49,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:49,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493248672] [2020-09-24 15:07:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 15:07:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:49,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493248672] [2020-09-24 15:07:49,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:49,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:07:49,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923121834] [2020-09-24 15:07:49,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:07:49,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:07:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:49,370 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 8 states. [2020-09-24 15:07:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:49,687 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2020-09-24 15:07:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:07:49,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-09-24 15:07:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:49,689 INFO L225 Difference]: With dead ends: 226 [2020-09-24 15:07:49,689 INFO L226 Difference]: Without dead ends: 131 [2020-09-24 15:07:49,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:07:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-24 15:07:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-09-24 15:07:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-24 15:07:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-09-24 15:07:49,701 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 77 [2020-09-24 15:07:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:49,701 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-09-24 15:07:49,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:07:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-09-24 15:07:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 15:07:49,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:49,703 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:49,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:07:49,704 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash 883135627, now seen corresponding path program 3 times [2020-09-24 15:07:49,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:49,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993644992] [2020-09-24 15:07:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:07:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:49,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993644992] [2020-09-24 15:07:49,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:49,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:07:49,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127468257] [2020-09-24 15:07:49,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:07:49,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:49,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:07:49,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:07:49,853 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand 10 states. [2020-09-24 15:07:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:50,195 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-09-24 15:07:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:07:50,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-09-24 15:07:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:50,199 INFO L225 Difference]: With dead ends: 233 [2020-09-24 15:07:50,199 INFO L226 Difference]: Without dead ends: 138 [2020-09-24 15:07:50,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:07:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-24 15:07:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-09-24 15:07:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-24 15:07:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-09-24 15:07:50,209 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 84 [2020-09-24 15:07:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:50,210 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-09-24 15:07:50,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:07:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-09-24 15:07:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 15:07:50,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:50,212 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:50,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:07:50,212 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash -687690455, now seen corresponding path program 4 times [2020-09-24 15:07:50,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:50,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437357764] [2020-09-24 15:07:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 15:07:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:50,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437357764] [2020-09-24 15:07:50,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:50,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 15:07:50,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136258638] [2020-09-24 15:07:50,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:07:50,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:07:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:07:50,407 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 12 states. [2020-09-24 15:07:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:50,847 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2020-09-24 15:07:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:07:50,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-09-24 15:07:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:50,849 INFO L225 Difference]: With dead ends: 240 [2020-09-24 15:07:50,849 INFO L226 Difference]: Without dead ends: 145 [2020-09-24 15:07:50,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 15:07:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-24 15:07:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-09-24 15:07:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-24 15:07:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-09-24 15:07:50,860 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 91 [2020-09-24 15:07:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:50,860 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-09-24 15:07:50,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:07:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-09-24 15:07:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-24 15:07:50,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:50,862 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:50,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:07:50,862 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash -722319669, now seen corresponding path program 5 times [2020-09-24 15:07:50,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:50,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167164349] [2020-09-24 15:07:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-24 15:07:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:51,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167164349] [2020-09-24 15:07:51,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:51,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 15:07:51,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067511521] [2020-09-24 15:07:51,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 15:07:51,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 15:07:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:07:51,059 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 14 states. [2020-09-24 15:07:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:51,532 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2020-09-24 15:07:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:07:51,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-09-24 15:07:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:51,534 INFO L225 Difference]: With dead ends: 247 [2020-09-24 15:07:51,534 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 15:07:51,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 15:07:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 15:07:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-09-24 15:07:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-24 15:07:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-09-24 15:07:51,546 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 98 [2020-09-24 15:07:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:51,547 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-09-24 15:07:51,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 15:07:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-09-24 15:07:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-24 15:07:51,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:51,549 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:51,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:07:51,550 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:51,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1819472617, now seen corresponding path program 6 times [2020-09-24 15:07:51,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:51,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398730656] [2020-09-24 15:07:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 15:07:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:51,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398730656] [2020-09-24 15:07:51,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:51,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 15:07:51,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68270710] [2020-09-24 15:07:51,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 15:07:51,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 15:07:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:07:51,769 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-09-24 15:07:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:52,390 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2020-09-24 15:07:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:07:52,391 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-09-24 15:07:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:52,393 INFO L225 Difference]: With dead ends: 254 [2020-09-24 15:07:52,393 INFO L226 Difference]: Without dead ends: 159 [2020-09-24 15:07:52,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 15:07:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-24 15:07:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-09-24 15:07:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 15:07:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-09-24 15:07:52,403 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 105 [2020-09-24 15:07:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:52,404 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-09-24 15:07:52,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 15:07:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-09-24 15:07:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-24 15:07:52,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:52,406 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:52,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:07:52,406 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash -612628213, now seen corresponding path program 7 times [2020-09-24 15:07:52,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:52,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57919027] [2020-09-24 15:07:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 15:07:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:52,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57919027] [2020-09-24 15:07:52,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:52,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 15:07:52,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022654095] [2020-09-24 15:07:52,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 15:07:52,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:52,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 15:07:52,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:07:52,683 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 18 states. [2020-09-24 15:07:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:53,382 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2020-09-24 15:07:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 15:07:53,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-09-24 15:07:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:53,384 INFO L225 Difference]: With dead ends: 256 [2020-09-24 15:07:53,384 INFO L226 Difference]: Without dead ends: 161 [2020-09-24 15:07:53,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 15:07:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-24 15:07:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-09-24 15:07:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-24 15:07:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2020-09-24 15:07:53,392 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 112 [2020-09-24 15:07:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:53,393 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2020-09-24 15:07:53,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 15:07:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2020-09-24 15:07:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 15:07:53,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:53,395 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:53,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:07:53,395 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1175857321, now seen corresponding path program 8 times [2020-09-24 15:07:53,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:53,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148751246] [2020-09-24 15:07:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-24 15:07:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:53,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148751246] [2020-09-24 15:07:53,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:53,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:07:53,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543760479] [2020-09-24 15:07:53,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:07:53,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:53,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:07:53,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:07:53,469 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand 4 states. [2020-09-24 15:07:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:53,655 INFO L93 Difference]: Finished difference Result 249 states and 269 transitions. [2020-09-24 15:07:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:07:53,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-09-24 15:07:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:53,657 INFO L225 Difference]: With dead ends: 249 [2020-09-24 15:07:53,657 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 15:07:53,658 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 15:07:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 15:07:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-09-24 15:07:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-24 15:07:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2020-09-24 15:07:53,663 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 119 [2020-09-24 15:07:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:53,664 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2020-09-24 15:07:53,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:07:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2020-09-24 15:07:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-24 15:07:53,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:53,666 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:53,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:07:53,667 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1395739916, now seen corresponding path program 1 times [2020-09-24 15:07:53,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:53,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132630363] [2020-09-24 15:07:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 15:07:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:53,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132630363] [2020-09-24 15:07:53,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:53,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:07:53,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208252321] [2020-09-24 15:07:53,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:07:53,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:07:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:53,826 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand 8 states. [2020-09-24 15:07:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:54,311 INFO L93 Difference]: Finished difference Result 427 states and 473 transitions. [2020-09-24 15:07:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:07:54,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-09-24 15:07:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:54,326 INFO L225 Difference]: With dead ends: 427 [2020-09-24 15:07:54,326 INFO L226 Difference]: Without dead ends: 336 [2020-09-24 15:07:54,328 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 15:07:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-09-24 15:07:54,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 199. [2020-09-24 15:07:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-09-24 15:07:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 217 transitions. [2020-09-24 15:07:54,367 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 217 transitions. Word has length 121 [2020-09-24 15:07:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:54,368 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 217 transitions. [2020-09-24 15:07:54,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:07:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 217 transitions. [2020-09-24 15:07:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-24 15:07:54,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:54,381 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:54,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:07:54,382 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 454539305, now seen corresponding path program 1 times [2020-09-24 15:07:54,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:54,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867101220] [2020-09-24 15:07:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 15:07:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:54,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867101220] [2020-09-24 15:07:54,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:54,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:07:54,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211210274] [2020-09-24 15:07:54,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:07:54,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:07:54,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:07:54,506 INFO L87 Difference]: Start difference. First operand 199 states and 217 transitions. Second operand 4 states. [2020-09-24 15:07:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:54,730 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2020-09-24 15:07:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:07:54,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-09-24 15:07:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:54,734 INFO L225 Difference]: With dead ends: 289 [2020-09-24 15:07:54,734 INFO L226 Difference]: Without dead ends: 200 [2020-09-24 15:07:54,738 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 15:07:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-24 15:07:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-09-24 15:07:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 15:07:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 217 transitions. [2020-09-24 15:07:54,751 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 217 transitions. Word has length 124 [2020-09-24 15:07:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:54,752 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 217 transitions. [2020-09-24 15:07:54,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:07:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 217 transitions. [2020-09-24 15:07:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-24 15:07:54,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:54,756 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:54,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:07:54,757 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:54,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1684557317, now seen corresponding path program 1 times [2020-09-24 15:07:54,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:54,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584149588] [2020-09-24 15:07:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 15:07:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584149588] [2020-09-24 15:07:55,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:55,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:07:55,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533378219] [2020-09-24 15:07:55,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:07:55,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:55,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:07:55,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:07:55,006 INFO L87 Difference]: Start difference. First operand 200 states and 217 transitions. Second operand 10 states. [2020-09-24 15:07:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:55,681 INFO L93 Difference]: Finished difference Result 499 states and 555 transitions. [2020-09-24 15:07:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:07:55,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-09-24 15:07:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:55,684 INFO L225 Difference]: With dead ends: 499 [2020-09-24 15:07:55,685 INFO L226 Difference]: Without dead ends: 406 [2020-09-24 15:07:55,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:07:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-09-24 15:07:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 204. [2020-09-24 15:07:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-24 15:07:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 221 transitions. [2020-09-24 15:07:55,696 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 221 transitions. Word has length 124 [2020-09-24 15:07:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:55,696 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 221 transitions. [2020-09-24 15:07:55,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:07:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 221 transitions. [2020-09-24 15:07:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-24 15:07:55,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:55,699 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:55,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:07:55,699 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1120204730, now seen corresponding path program 1 times [2020-09-24 15:07:55,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:55,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217365146] [2020-09-24 15:07:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 15:07:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:55,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217365146] [2020-09-24 15:07:55,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:55,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:07:55,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364468292] [2020-09-24 15:07:55,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:07:55,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:07:55,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:07:55,852 INFO L87 Difference]: Start difference. First operand 204 states and 221 transitions. Second operand 10 states. [2020-09-24 15:07:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:56,456 INFO L93 Difference]: Finished difference Result 450 states and 497 transitions. [2020-09-24 15:07:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:07:56,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-09-24 15:07:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:56,460 INFO L225 Difference]: With dead ends: 450 [2020-09-24 15:07:56,460 INFO L226 Difference]: Without dead ends: 346 [2020-09-24 15:07:56,462 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 15:07:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-09-24 15:07:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 214. [2020-09-24 15:07:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-24 15:07:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 233 transitions. [2020-09-24 15:07:56,474 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 233 transitions. Word has length 126 [2020-09-24 15:07:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:56,474 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 233 transitions. [2020-09-24 15:07:56,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:07:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 233 transitions. [2020-09-24 15:07:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-24 15:07:56,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:56,479 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:07:56,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:07:56,480 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2135603949, now seen corresponding path program 1 times [2020-09-24 15:07:56,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:56,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394006626] [2020-09-24 15:07:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-09-24 15:07:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:56,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394006626] [2020-09-24 15:07:56,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:56,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 15:07:56,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433863204] [2020-09-24 15:07:56,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 15:07:56,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:56,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 15:07:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:07:56,678 INFO L87 Difference]: Start difference. First operand 214 states and 233 transitions. Second operand 12 states. [2020-09-24 15:07:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:57,296 INFO L93 Difference]: Finished difference Result 488 states and 541 transitions. [2020-09-24 15:07:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:07:57,297 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-09-24 15:07:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:57,300 INFO L225 Difference]: With dead ends: 488 [2020-09-24 15:07:57,300 INFO L226 Difference]: Without dead ends: 384 [2020-09-24 15:07:57,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:07:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-09-24 15:07:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 195. [2020-09-24 15:07:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-09-24 15:07:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 211 transitions. [2020-09-24 15:07:57,315 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 211 transitions. Word has length 129 [2020-09-24 15:07:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:57,315 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 211 transitions. [2020-09-24 15:07:57,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 15:07:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 211 transitions. [2020-09-24 15:07:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 15:07:57,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:57,318 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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 15:07:57,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:07:57,318 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash -374659365, now seen corresponding path program 1 times [2020-09-24 15:07:57,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:57,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670925162] [2020-09-24 15:07:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 15:07:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:57,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670925162] [2020-09-24 15:07:57,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:57,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:07:57,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446627082] [2020-09-24 15:07:57,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:07:57,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:07:57,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:57,473 INFO L87 Difference]: Start difference. First operand 195 states and 211 transitions. Second operand 8 states. [2020-09-24 15:07:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:58,025 INFO L93 Difference]: Finished difference Result 454 states and 505 transitions. [2020-09-24 15:07:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:07:58,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-09-24 15:07:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:58,028 INFO L225 Difference]: With dead ends: 454 [2020-09-24 15:07:58,029 INFO L226 Difference]: Without dead ends: 361 [2020-09-24 15:07:58,030 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 15:07:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-09-24 15:07:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2020-09-24 15:07:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-24 15:07:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 284 transitions. [2020-09-24 15:07:58,039 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 284 transitions. Word has length 131 [2020-09-24 15:07:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:58,040 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 284 transitions. [2020-09-24 15:07:58,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:07:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 284 transitions. [2020-09-24 15:07:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 15:07:58,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:58,042 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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 15:07:58,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 15:07:58,042 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:58,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1298582752, now seen corresponding path program 1 times [2020-09-24 15:07:58,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:58,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096630097] [2020-09-24 15:07:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 15:07:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2020-09-24 15:07:58,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096630097] [2020-09-24 15:07:58,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:58,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:07:58,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863903082] [2020-09-24 15:07:58,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:07:58,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:58,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:07:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:07:58,109 INFO L87 Difference]: Start difference. First operand 258 states and 284 transitions. Second operand 4 states. [2020-09-24 15:07:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:58,290 INFO L93 Difference]: Finished difference Result 375 states and 415 transitions. [2020-09-24 15:07:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 15:07:58,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-09-24 15:07:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:58,292 INFO L225 Difference]: With dead ends: 375 [2020-09-24 15:07:58,293 INFO L226 Difference]: Without dead ends: 259 [2020-09-24 15:07:58,293 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 15:07:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-24 15:07:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-09-24 15:07:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-09-24 15:07:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 283 transitions. [2020-09-24 15:07:58,301 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 283 transitions. Word has length 131 [2020-09-24 15:07:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:58,302 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 283 transitions. [2020-09-24 15:07:58,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:07:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 283 transitions. [2020-09-24 15:07:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-24 15:07:58,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:58,304 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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 15:07:58,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 15:07:58,304 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:58,305 INFO L82 PathProgramCache]: Analyzing trace with hash -729212679, now seen corresponding path program 1 times [2020-09-24 15:07:58,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:58,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713443844] [2020-09-24 15:07:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 15:07:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-24 15:07:58,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713443844] [2020-09-24 15:07:58,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:58,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:07:58,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143789867] [2020-09-24 15:07:58,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:07:58,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:58,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:07:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:07:58,394 INFO L87 Difference]: Start difference. First operand 259 states and 283 transitions. Second operand 6 states. [2020-09-24 15:07:58,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:58,631 INFO L93 Difference]: Finished difference Result 259 states and 283 transitions. [2020-09-24 15:07:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:07:58,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2020-09-24 15:07:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:58,632 INFO L225 Difference]: With dead ends: 259 [2020-09-24 15:07:58,632 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:07:58,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:07:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:07:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:07:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:07:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:07:58,634 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 132 [2020-09-24 15:07:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:58,635 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:07:58,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:07:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:07:58,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:07:58,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 15:07:58,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:07:58,800 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,800 INFO L268 CegarLoopResult]: For program point L60-1(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,800 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,800 INFO L268 CegarLoopResult]: For program point L60-4(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,800 INFO L268 CegarLoopResult]: For program point L60-5(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,801 INFO L268 CegarLoopResult]: For program point L60-6(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,801 INFO L268 CegarLoopResult]: For program point L60-7(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,801 INFO L268 CegarLoopResult]: For program point L60-8(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,801 INFO L268 CegarLoopResult]: For program point L60-9(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,801 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-09-24 15:07:58,801 INFO L268 CegarLoopResult]: For program point L60-11(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,801 INFO L271 CegarLoopResult]: At program point L52-3(lines 52 73) the Hoare annotation is: true [2020-09-24 15:07:58,802 INFO L268 CegarLoopResult]: For program point L60-12(line 60) no Hoare annotation was computed. [2020-09-24 15:07:58,803 INFO L268 CegarLoopResult]: For program point L52-4(lines 52 73) no Hoare annotation was computed. [2020-09-24 15:07:58,803 INFO L268 CegarLoopResult]: For program point L60-13(lines 54 72) no Hoare annotation was computed. [2020-09-24 15:07:58,803 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-09-24 15:07:58,803 INFO L268 CegarLoopResult]: For program point L53(line 53) no Hoare annotation was computed. [2020-09-24 15:07:58,803 INFO L268 CegarLoopResult]: For program point L53-1(line 53) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L54(line 54) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L54-1(line 54) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L54-2(lines 54 72) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L54-3(line 54) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L63(line 63) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-09-24 15:07:58,804 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,805 INFO L268 CegarLoopResult]: For program point L56-2(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,805 INFO L268 CegarLoopResult]: For program point L56-4(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,805 INFO L268 CegarLoopResult]: For program point L56-5(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,805 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,805 INFO L268 CegarLoopResult]: For program point L56-7(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,806 INFO L268 CegarLoopResult]: For program point L56-8(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,806 INFO L268 CegarLoopResult]: For program point L56-9(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,806 INFO L268 CegarLoopResult]: For program point L56-11(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,806 INFO L268 CegarLoopResult]: For program point L56-12(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,807 INFO L268 CegarLoopResult]: For program point L56-13(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,807 INFO L268 CegarLoopResult]: For program point L56-14(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,807 INFO L268 CegarLoopResult]: For program point L56-15(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,807 INFO L268 CegarLoopResult]: For program point L73(lines 52 73) no Hoare annotation was computed. [2020-09-24 15:07:58,807 INFO L268 CegarLoopResult]: For program point L56-16(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,807 INFO L268 CegarLoopResult]: For program point L73-1(line 73) no Hoare annotation was computed. [2020-09-24 15:07:58,807 INFO L271 CegarLoopResult]: At program point L56-17(line 56) the Hoare annotation is: true [2020-09-24 15:07:58,808 INFO L268 CegarLoopResult]: For program point L73-2(line 73) no Hoare annotation was computed. [2020-09-24 15:07:58,808 INFO L268 CegarLoopResult]: For program point L56-18(line 56) no Hoare annotation was computed. [2020-09-24 15:07:58,808 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-24 15:07:58,808 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-09-24 15:07:58,808 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-09-24 15:07:58,808 INFO L268 CegarLoopResult]: For program point L57-1(line 57) no Hoare annotation was computed. [2020-09-24 15:07:58,809 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-09-24 15:07:58,809 INFO L268 CegarLoopResult]: For program point L57-3(line 57) no Hoare annotation was computed. [2020-09-24 15:07:58,809 INFO L268 CegarLoopResult]: For program point L57-4(line 57) no Hoare annotation was computed. [2020-09-24 15:07:58,809 INFO L268 CegarLoopResult]: For program point L57-6(line 57) no Hoare annotation was computed. [2020-09-24 15:07:58,809 INFO L268 CegarLoopResult]: For program point L57-7(line 57) no Hoare annotation was computed. [2020-09-24 15:07:58,809 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-09-24 15:07:58,810 INFO L268 CegarLoopResult]: For program point L49-1(line 49) no Hoare annotation was computed. [2020-09-24 15:07:58,810 INFO L268 CegarLoopResult]: For program point L49-2(line 49) no Hoare annotation was computed. [2020-09-24 15:07:58,810 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-24 15:07:58,810 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-09-24 15:07:58,810 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-09-24 15:07:58,810 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-24 15:07:58,810 INFO L268 CegarLoopResult]: For program point L50(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,811 INFO L268 CegarLoopResult]: For program point L50-1(lines 48 75) no Hoare annotation was computed. [2020-09-24 15:07:58,811 INFO L268 CegarLoopResult]: For program point L50-2(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,811 INFO L268 CegarLoopResult]: For program point L50-3(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,812 INFO L268 CegarLoopResult]: For program point L50-4(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,812 INFO L268 CegarLoopResult]: For program point L50-5(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point L50-6(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point L50-7(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point L50-8(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point L50-9(line 50) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point L67(lines 61 70) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,813 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L59-3(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L59-7(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L59-8(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L59-10(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,814 INFO L268 CegarLoopResult]: For program point L59-11(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,815 INFO L268 CegarLoopResult]: For program point L59-12(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,815 INFO L268 CegarLoopResult]: For program point L59-13(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,815 INFO L268 CegarLoopResult]: For program point L59-14(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,815 INFO L268 CegarLoopResult]: For program point L59-16(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,815 INFO L268 CegarLoopResult]: For program point L59-17(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,816 INFO L268 CegarLoopResult]: For program point L59-18(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,816 INFO L268 CegarLoopResult]: For program point L59-19(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,816 INFO L268 CegarLoopResult]: For program point L59-20(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,817 INFO L268 CegarLoopResult]: For program point L59-21(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,817 INFO L268 CegarLoopResult]: For program point L59-22(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,817 INFO L271 CegarLoopResult]: At program point L59-23(line 59) the Hoare annotation is: true [2020-09-24 15:07:58,817 INFO L268 CegarLoopResult]: For program point L59-24(line 59) no Hoare annotation was computed. [2020-09-24 15:07:58,817 INFO L268 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-09-24 15:07:58,818 INFO L268 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-09-24 15:07:58,818 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-24 15:07:58,818 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-24 15:07:58,818 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:07:58,818 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-09-24 15:07:58,818 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-24 15:07:58,818 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-09-24 15:07:58,819 INFO L268 CegarLoopResult]: For program point L31-2(line 31) no Hoare annotation was computed. [2020-09-24 15:07:58,819 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-09-24 15:07:58,819 INFO L268 CegarLoopResult]: For program point L31-3(line 31) no Hoare annotation was computed. [2020-09-24 15:07:58,819 INFO L268 CegarLoopResult]: For program point L31-4(line 31) no Hoare annotation was computed. [2020-09-24 15:07:58,819 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-09-24 15:07:58,819 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:07:58,819 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 15:07:58,819 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point L79-3(line 79) no Hoare annotation was computed. [2020-09-24 15:07:58,820 INFO L268 CegarLoopResult]: For program point L79-4(line 79) no Hoare annotation was computed. [2020-09-24 15:07:58,821 INFO L271 CegarLoopResult]: At program point L79-5(lines 79 81) the Hoare annotation is: true [2020-09-24 15:07:58,821 INFO L268 CegarLoopResult]: For program point L79-6(lines 79 81) no Hoare annotation was computed. [2020-09-24 15:07:58,821 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-24 15:07:58,821 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-09-24 15:07:58,822 INFO L271 CegarLoopResult]: At program point L82(line 82) the Hoare annotation is: true [2020-09-24 15:07:58,823 INFO L268 CegarLoopResult]: For program point L80(line 80) no Hoare annotation was computed. [2020-09-24 15:07:58,823 INFO L268 CegarLoopResult]: For program point L80-1(line 80) no Hoare annotation was computed. [2020-09-24 15:07:58,823 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-09-24 15:07:58,823 INFO L268 CegarLoopResult]: For program point L80-2(line 80) no Hoare annotation was computed. [2020-09-24 15:07:58,823 INFO L268 CegarLoopResult]: For program point L78-1(line 78) no Hoare annotation was computed. [2020-09-24 15:07:58,823 INFO L268 CegarLoopResult]: For program point L78-2(line 78) no Hoare annotation was computed. [2020-09-24 15:07:58,823 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-24 15:07:58,824 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-24 15:07:58,824 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 15:07:58,824 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-24 15:07:58,824 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-24 15:07:58,824 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-24 15:07:58,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:07:58 BoogieIcfgContainer [2020-09-24 15:07:58,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:07:58,843 INFO L168 Benchmark]: Toolchain (without parser) took 12488.61 ms. Allocated memory was 140.0 MB in the beginning and 375.9 MB in the end (delta: 235.9 MB). Free memory was 103.1 MB in the beginning and 325.4 MB in the end (delta: -222.3 MB). Peak memory consumption was 215.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:58,844 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:07:58,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 480.83 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.5 MB in the beginning and 180.0 MB in the end (delta: -77.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:58,845 INFO L168 Benchmark]: Boogie Preprocessor took 55.58 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 177.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:58,846 INFO L168 Benchmark]: RCFGBuilder took 615.71 ms. Allocated memory is still 202.9 MB. Free memory was 177.4 MB in the beginning and 142.8 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:58,847 INFO L168 Benchmark]: TraceAbstraction took 11324.18 ms. Allocated memory was 202.9 MB in the beginning and 375.9 MB in the end (delta: 173.0 MB). Free memory was 142.1 MB in the beginning and 325.4 MB in the end (delta: -183.3 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:58,850 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 480.83 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 102.5 MB in the beginning and 180.0 MB in the end (delta: -77.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.58 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 177.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 615.71 ms. Allocated memory is still 202.9 MB. Free memory was 177.4 MB in the beginning and 142.8 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11324.18 ms. Allocated memory was 202.9 MB in the beginning and 375.9 MB in the end (delta: 173.0 MB). Free memory was 142.1 MB in the beginning and 325.4 MB in the end (delta: -183.3 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 135 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.0s, OverallIterations: 18, TraceHistogramMax: 8, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2219 SDtfs, 2079 SDslu, 9057 SDs, 0 SdLazy, 4857 SolverSat, 185 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred 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, 18 MinimizatonAttempts, 798 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 102 PreInvPairs, 123 NumberOfFragments, 35 HoareAnnotationTreeSize, 102 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 1888 NumberOfCodeBlocks, 1888 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1870 ConstructedInterpolants, 0 QuantifiedInterpolants, 401187 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 10 PerfectInterpolantSequences, 1845/2269 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 correct! Received shutdown request...