/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:56:02,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:56:02,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:56:02,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:56:02,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:56:02,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:56:02,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:56:02,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:56:02,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:56:02,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:56:02,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:56:02,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:56:02,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:56:02,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:56:02,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:56:02,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:56:02,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:56:02,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:56:02,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:56:02,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:56:02,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:56:02,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:56:02,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:56:02,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:56:02,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:56:02,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:56:02,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:56:02,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:56:02,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:56:02,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:56:02,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:56:02,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:56:02,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:56:02,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:56:02,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:56:02,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:56:02,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:56:02,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:56:02,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:56:02,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:56:02,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:56:02,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:56:02,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:56:02,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:56:02,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:56:02,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:56:02,916 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:56:02,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:56:02,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:56:02,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:56:02,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:56:02,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:56:02,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:56:02,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:56:02,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:56:02,919 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:56:02,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:56:02,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:56:02,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:56:02,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:56:02,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:56:02,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:56:02,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:56:02,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:56:02,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:56:02,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:56:02,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:56:02,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:56:02,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:56:02,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:56:02,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:56:02,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:56:03,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:56:03,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:56:03,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:56:03,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:56:03,277 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:56:03,277 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 14:56:03,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6b7e156a/5274fb0994944cc987b68a34cd01f135/FLAG1815e9bec [2020-08-21 14:56:03,950 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:56:03,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 14:56:03,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6b7e156a/5274fb0994944cc987b68a34cd01f135/FLAG1815e9bec [2020-08-21 14:56:04,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c6b7e156a/5274fb0994944cc987b68a34cd01f135 [2020-08-21 14:56:04,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:56:04,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:56:04,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:04,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:56:04,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:56:04,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:04,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@702e2c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04, skipping insertion in model container [2020-08-21 14:56:04,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:04,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:56:04,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:56:04,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:04,804 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:56:04,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:04,962 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:56:04,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04 WrapperNode [2020-08-21 14:56:04,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:04,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:56:04,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:56:04,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:56:04,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:04,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:04,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:05,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:05,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:05,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:05,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... [2020-08-21 14:56:05,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:56:05,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:56:05,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:56:05,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:56:05,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:56:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:56:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:56:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 14:56:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 14:56:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 14:56:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-21 14:56:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-21 14:56:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-21 14:56:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-21 14:56:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-21 14:56:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-21 14:56:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-21 14:56:05,119 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-21 14:56:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-21 14:56:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-21 14:56:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-21 14:56:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-21 14:56:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-21 14:56:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-21 14:56:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-21 14:56:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-21 14:56:05,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:56:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:56:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 14:56:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 14:56:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 14:56:05,122 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 14:56:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 14:56:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 14:56:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 14:56:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 14:56:05,123 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 14:56:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 14:56:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 14:56:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 14:56:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 14:56:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 14:56:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 14:56:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 14:56:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 14:56:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 14:56:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 14:56:05,125 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 14:56:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 14:56:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 14:56:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 14:56:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 14:56:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 14:56:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 14:56:05,126 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 14:56:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 14:56:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 14:56:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 14:56:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 14:56:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 14:56:05,127 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 14:56:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 14:56:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 14:56:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 14:56:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 14:56:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 14:56:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 14:56:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 14:56:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 14:56:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 14:56:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 14:56:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 14:56:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 14:56:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 14:56:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 14:56:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 14:56:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 14:56:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 14:56:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 14:56:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 14:56:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:56:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 14:56:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 14:56:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:56:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 14:56:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 14:56:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 14:56:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 14:56:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 14:56:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 14:56:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 14:56:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 14:56:05,132 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 14:56:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 14:56:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 14:56:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 14:56:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 14:56:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 14:56:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 14:56:05,133 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 14:56:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 14:56:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 14:56:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 14:56:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 14:56:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 14:56:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 14:56:05,134 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 14:56:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 14:56:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 14:56:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 14:56:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 14:56:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 14:56:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 14:56:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 14:56:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 14:56:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 14:56:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 14:56:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 14:56:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 14:56:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 14:56:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 14:56:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 14:56:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 14:56:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 14:56:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 14:56:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 14:56:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 14:56:05,137 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 14:56:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 14:56:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 14:56:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 14:56:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 14:56:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 14:56:05,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:56:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-21 14:56:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-21 14:56:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:56:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:56:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-21 14:56:05,139 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-21 14:56:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:56:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-21 14:56:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:56:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 14:56:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 14:56:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:56:05,140 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-21 14:56:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-21 14:56:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-21 14:56:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-21 14:56:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-21 14:56:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-21 14:56:05,141 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-21 14:56:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-21 14:56:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-21 14:56:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-21 14:56:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-21 14:56:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:56:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:56:05,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:56:05,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:56:05,995 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-21 14:56:06,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:06 BoogieIcfgContainer [2020-08-21 14:56:06,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:56:06,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:56:06,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:56:06,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:56:06,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:56:04" (1/3) ... [2020-08-21 14:56:06,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626b734b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:06, skipping insertion in model container [2020-08-21 14:56:06,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:04" (2/3) ... [2020-08-21 14:56:06,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626b734b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:06, skipping insertion in model container [2020-08-21 14:56:06,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:06" (3/3) ... [2020-08-21 14:56:06,009 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-21 14:56:06,021 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:56:06,029 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:56:06,044 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:56:06,069 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:56:06,069 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:56:06,069 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:56:06,070 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:56:06,070 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:56:06,070 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:56:06,070 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:56:06,070 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:56:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-21 14:56:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 14:56:06,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:06,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:06,106 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-21 14:56:06,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:06,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51482471] [2020-08-21 14:56:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:56:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 14:56:06,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51482471] [2020-08-21 14:56:06,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:06,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:56:06,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307402436] [2020-08-21 14:56:06,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:56:06,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:56:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:06,628 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-21 14:56:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:07,232 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-21 14:56:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:56:07,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-21 14:56:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:07,270 INFO L225 Difference]: With dead ends: 343 [2020-08-21 14:56:07,271 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 14:56:07,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:56:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 14:56:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-21 14:56:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 14:56:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-21 14:56:07,366 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-21 14:56:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:07,367 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-21 14:56:07,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:56:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-21 14:56:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 14:56:07,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:07,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:07,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:56:07,372 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:07,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:07,372 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-21 14:56:07,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:07,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058391439] [2020-08-21 14:56:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:56:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 14:56:07,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058391439] [2020-08-21 14:56:07,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:07,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:56:07,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214997029] [2020-08-21 14:56:07,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:56:07,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:56:07,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:56:07,809 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-21 14:56:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:09,083 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-21 14:56:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:56:09,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-21 14:56:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:09,087 INFO L225 Difference]: With dead ends: 327 [2020-08-21 14:56:09,089 INFO L226 Difference]: Without dead ends: 179 [2020-08-21 14:56:09,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:56:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-21 14:56:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-21 14:56:09,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 14:56:09,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-21 14:56:09,119 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-21 14:56:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:09,119 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-21 14:56:09,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:56:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-21 14:56:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 14:56:09,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:09,126 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:09,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:56:09,127 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-21 14:56:09,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:09,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322299224] [2020-08-21 14:56:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:56:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 14:56:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-21 14:56:11,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322299224] [2020-08-21 14:56:11,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:11,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 14:56:11,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124890638] [2020-08-21 14:56:11,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 14:56:11,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:11,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 14:56:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:56:11,023 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-21 14:56:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:14,130 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-21 14:56:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:56:14,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 14:56:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:14,137 INFO L225 Difference]: With dead ends: 348 [2020-08-21 14:56:14,137 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 14:56:14,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 14:56:14,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 14:56:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-21 14:56:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-21 14:56:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-21 14:56:14,178 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-21 14:56:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:14,178 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-21 14:56:14,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 14:56:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-21 14:56:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 14:56:14,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:14,182 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:14,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:56:14,182 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:14,183 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-21 14:56:14,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:14,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988065414] [2020-08-21 14:56:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:56:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 14:56:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-21 14:56:15,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988065414] [2020-08-21 14:56:15,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:15,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 14:56:15,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196019061] [2020-08-21 14:56:15,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 14:56:15,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:15,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 14:56:15,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:56:15,516 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-21 14:56:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:17,671 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-21 14:56:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:56:17,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-21 14:56:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:17,677 INFO L225 Difference]: With dead ends: 360 [2020-08-21 14:56:17,677 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 14:56:17,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:56:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 14:56:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-21 14:56:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 14:56:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-21 14:56:17,714 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-21 14:56:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:17,715 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-21 14:56:17,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 14:56:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-21 14:56:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 14:56:17,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:17,718 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:17,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:56:17,719 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-21 14:56:17,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:17,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144154396] [2020-08-21 14:56:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:17,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:56:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:17,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 14:56:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-21 14:56:18,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144154396] [2020-08-21 14:56:18,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:18,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 14:56:18,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368208500] [2020-08-21 14:56:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 14:56:18,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 14:56:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:56:18,925 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-21 14:56:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:21,694 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-21 14:56:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:56:21,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 14:56:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:21,700 INFO L225 Difference]: With dead ends: 371 [2020-08-21 14:56:21,700 INFO L226 Difference]: Without dead ends: 198 [2020-08-21 14:56:21,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 14:56:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-21 14:56:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-21 14:56:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 14:56:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-21 14:56:21,719 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-21 14:56:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:21,720 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-21 14:56:21,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 14:56:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-21 14:56:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 14:56:21,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:21,723 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:21,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:56:21,723 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:21,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-21 14:56:21,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:21,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36221816] [2020-08-21 14:56:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:21,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:21,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:56:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 14:56:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:22,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-21 14:56:23,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36221816] [2020-08-21 14:56:23,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:23,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 14:56:23,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903105558] [2020-08-21 14:56:23,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 14:56:23,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:23,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 14:56:23,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:56:23,146 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-21 14:56:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:25,507 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-21 14:56:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 14:56:25,507 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-21 14:56:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:25,516 INFO L225 Difference]: With dead ends: 323 [2020-08-21 14:56:25,516 INFO L226 Difference]: Without dead ends: 254 [2020-08-21 14:56:25,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 14:56:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-21 14:56:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-21 14:56:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 14:56:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-21 14:56:25,545 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-21 14:56:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:25,547 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-21 14:56:25,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 14:56:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-21 14:56:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 14:56:25,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:25,556 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:25,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:56:25,557 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-21 14:56:25,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:25,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641541567] [2020-08-21 14:56:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:25,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:25,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:56:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:26,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:26,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:26,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:26,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:27,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:27,782 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-21 14:56:28,616 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-21 14:56:29,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:29,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:29,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:29,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:56:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:29,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:29,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:30,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 14:56:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:30,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:56:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:30,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:56:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:31,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:56:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:31,855 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-21 14:56:31,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat