/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:26:58,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:26:58,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:26:59,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:26:59,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:26:59,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:26:59,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:26:59,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:26:59,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:26:59,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:26:59,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:26:59,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:26:59,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:26:59,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:26:59,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:26:59,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:26:59,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:26:59,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:26:59,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:26:59,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:26:59,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:26:59,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:26:59,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:26:59,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:26:59,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:26:59,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:26:59,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:26:59,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:26:59,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:26:59,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 01:26:59,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 01:26:59,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 01:26:59,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 01:26:59,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 01:26:59,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 01:26:59,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 01:26:59,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 01:26:59,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 01:26:59,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:26:59,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:26:59,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:26:59,061 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 [2020-08-22 01:26:59,086 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:26:59,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:26:59,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:26:59,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:26:59,088 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:26:59,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:26:59,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:26:59,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:26:59,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:26:59,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:26:59,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:26:59,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:26:59,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:26:59,090 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:26:59,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:26:59,093 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:26:59,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:26:59,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:26:59,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:26:59,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:26:59,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:26:59,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:26:59,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:26:59,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:26:59,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:26:59,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:26:59,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:26:59,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:26:59,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:26:59,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:26:59,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:26:59,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:26:59,450 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:26:59,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:26:59,452 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:26:59,452 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-22 01:26:59,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e66e2828a/706c5798146546e49702a627826f697c/FLAGe56b01f09 [2020-08-22 01:27:00,141 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:27:00,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-22 01:27:00,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e66e2828a/706c5798146546e49702a627826f697c/FLAGe56b01f09 [2020-08-22 01:27:00,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e66e2828a/706c5798146546e49702a627826f697c [2020-08-22 01:27:00,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:27:00,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:27:00,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:27:00,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:27:00,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:27:00,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:27:00" (1/1) ... [2020-08-22 01:27:00,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec95236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:00, skipping insertion in model container [2020-08-22 01:27:00,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:27:00" (1/1) ... [2020-08-22 01:27:00,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:27:00,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:27:00,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:27:00,956 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:27:01,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:27:01,088 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:27:01,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01 WrapperNode [2020-08-22 01:27:01,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:27:01,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:27:01,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:27:01,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:27:01,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (1/1) ... [2020-08-22 01:27:01,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (1/1) ... [2020-08-22 01:27:01,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (1/1) ... [2020-08-22 01:27:01,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (1/1) ... [2020-08-22 01:27:01,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (1/1) ... [2020-08-22 01:27:01,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (1/1) ... [2020-08-22 01:27:01,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (1/1) ... [2020-08-22 01:27:01,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:27:01,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:27:01,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:27:01,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:27:01,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (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 [2020-08-22 01:27:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:27:01,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:27:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 01:27:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 01:27:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 01:27:01,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:27:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:27:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:27:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 01:27:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 01:27:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 01:27:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 01:27:01,261 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 01:27:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 01:27:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 01:27:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 01:27:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 01:27:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 01:27:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 01:27:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 01:27:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 01:27:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 01:27:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 01:27:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 01:27:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 01:27:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 01:27:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 01:27:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 01:27:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 01:27:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 01:27:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 01:27:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 01:27:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 01:27:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 01:27:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 01:27:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 01:27:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 01:27:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 01:27:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 01:27:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 01:27:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 01:27:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 01:27:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 01:27:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 01:27:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 01:27:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 01:27:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 01:27:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 01:27:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 01:27:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 01:27:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 01:27:01,272 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 01:27:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 01:27:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 01:27:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 01:27:01,273 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 01:27:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 01:27:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 01:27:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 01:27:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 01:27:01,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 01:27:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 01:27:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 01:27:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 01:27:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 01:27:01,275 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 01:27:01,276 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 01:27:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 01:27:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 01:27:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 01:27:01,277 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 01:27:01,278 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 01:27:01,279 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 01:27:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 01:27:01,280 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 01:27:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 01:27:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 01:27:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 01:27:01,281 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 01:27:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 01:27:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 01:27:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 01:27:01,282 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 01:27:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 01:27:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 01:27:01,283 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 01:27:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 01:27:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 01:27:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 01:27:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 01:27:01,284 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 01:27:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 01:27:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 01:27:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 01:27:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 01:27:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 01:27:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 01:27:01,285 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 01:27:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 01:27:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 01:27:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 01:27:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 01:27:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 01:27:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 01:27:01,286 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 01:27:01,287 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 01:27:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 01:27:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:27:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 01:27:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 01:27:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 01:27:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:27:01,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 01:27:01,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 01:27:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:27:01,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:27:01,745 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 01:27:02,114 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:27:02,114 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-22 01:27:02,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:27:02 BoogieIcfgContainer [2020-08-22 01:27:02,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:27:02,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:27:02,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:27:02,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:27:02,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:27:00" (1/3) ... [2020-08-22 01:27:02,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5099db13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:27:02, skipping insertion in model container [2020-08-22 01:27:02,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:27:01" (2/3) ... [2020-08-22 01:27:02,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5099db13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:27:02, skipping insertion in model container [2020-08-22 01:27:02,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:27:02" (3/3) ... [2020-08-22 01:27:02,129 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-08-22 01:27:02,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:27:02,147 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:27:02,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:27:02,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:27:02,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:27:02,180 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:27:02,180 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:27:02,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:27:02,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:27:02,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:27:02,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:27:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-08-22 01:27:02,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:27:02,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:02,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:02,209 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-08-22 01:27:02,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:02,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154627716] [2020-08-22 01:27:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:02,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:27:02,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154627716] [2020-08-22 01:27:02,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:27:02,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:27:02,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711066938] [2020-08-22 01:27:02,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:27:02,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:27:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:27:02,467 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-08-22 01:27:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:02,739 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-08-22 01:27:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:27:02,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 01:27:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:02,751 INFO L225 Difference]: With dead ends: 108 [2020-08-22 01:27:02,751 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 01:27:02,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:27:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 01:27:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-22 01:27:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 01:27:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-08-22 01:27:02,806 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-08-22 01:27:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:02,806 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-08-22 01:27:02,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:27:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-08-22 01:27:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:27:02,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:02,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:02,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:27:02,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-08-22 01:27:02,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:02,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991402678] [2020-08-22 01:27:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:02,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:27:02,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991402678] [2020-08-22 01:27:02,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:27:02,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:27:02,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618067351] [2020-08-22 01:27:02,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:27:02,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:02,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:27:02,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:27:02,968 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-08-22 01:27:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:03,154 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-08-22 01:27:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:27:03,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-22 01:27:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:03,158 INFO L225 Difference]: With dead ends: 75 [2020-08-22 01:27:03,158 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 01:27:03,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:27:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 01:27:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-22 01:27:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 01:27:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-08-22 01:27:03,170 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-08-22 01:27:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:03,171 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-08-22 01:27:03,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:27:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-08-22 01:27:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:27:03,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:03,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:03,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:27:03,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-08-22 01:27:03,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:03,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426928677] [2020-08-22 01:27:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:03,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:27:03,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426928677] [2020-08-22 01:27:03,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:27:03,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:27:03,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028756331] [2020-08-22 01:27:03,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:27:03,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:03,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:27:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:27:03,239 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-08-22 01:27:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:03,401 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-08-22 01:27:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:27:03,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-22 01:27:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:03,403 INFO L225 Difference]: With dead ends: 93 [2020-08-22 01:27:03,404 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 01:27:03,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:27:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 01:27:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 01:27:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 01:27:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-08-22 01:27:03,413 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-08-22 01:27:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:03,413 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-08-22 01:27:03,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:27:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-08-22 01:27:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 01:27:03,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:03,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:03,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:27:03,416 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:03,416 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-08-22 01:27:03,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:03,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210363054] [2020-08-22 01:27:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:03,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:03,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210363054] [2020-08-22 01:27:03,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:27:03,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:27:03,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767688110] [2020-08-22 01:27:03,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:27:03,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:27:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:27:03,514 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-08-22 01:27:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:03,749 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-08-22 01:27:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:27:03,749 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-22 01:27:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:03,751 INFO L225 Difference]: With dead ends: 82 [2020-08-22 01:27:03,751 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 01:27:03,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:27:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 01:27:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-22 01:27:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 01:27:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-08-22 01:27:03,762 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-08-22 01:27:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:03,763 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-08-22 01:27:03,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:27:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-08-22 01:27:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 01:27:03,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:03,765 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:03,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:27:03,766 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-08-22 01:27:03,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:03,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053103377] [2020-08-22 01:27:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:03,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:03,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053103377] [2020-08-22 01:27:03,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:27:03,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:27:03,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344480731] [2020-08-22 01:27:03,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:27:03,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:27:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:27:03,945 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-08-22 01:27:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:04,252 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-22 01:27:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:27:04,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 01:27:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:04,254 INFO L225 Difference]: With dead ends: 84 [2020-08-22 01:27:04,254 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 01:27:04,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:27:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 01:27:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-08-22 01:27:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 01:27:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-08-22 01:27:04,269 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-08-22 01:27:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:04,270 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-08-22 01:27:04,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:27:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-08-22 01:27:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 01:27:04,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:04,272 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:04,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:27:04,272 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-08-22 01:27:04,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:04,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764079815] [2020-08-22 01:27:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:04,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:04,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764079815] [2020-08-22 01:27:04,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:27:04,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:27:04,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543023900] [2020-08-22 01:27:04,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:27:04,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:27:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:27:04,339 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-08-22 01:27:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:04,564 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-22 01:27:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:27:04,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 01:27:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:04,567 INFO L225 Difference]: With dead ends: 84 [2020-08-22 01:27:04,567 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 01:27:04,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:27:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 01:27:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-08-22 01:27:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 01:27:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-08-22 01:27:04,575 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-08-22 01:27:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:04,575 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-08-22 01:27:04,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:27:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-08-22 01:27:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 01:27:04,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:04,577 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:04,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:27:04,578 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-08-22 01:27:04,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:04,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652239215] [2020-08-22 01:27:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:04,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:04,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652239215] [2020-08-22 01:27:04,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:04,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:27:04,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741390514] [2020-08-22 01:27:04,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:27:04,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:04,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:27:04,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:27:04,724 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-08-22 01:27:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:05,065 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-08-22 01:27:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:27:05,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-22 01:27:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:05,067 INFO L225 Difference]: With dead ends: 86 [2020-08-22 01:27:05,067 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 01:27:05,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:27:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 01:27:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-08-22 01:27:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 01:27:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-08-22 01:27:05,075 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-08-22 01:27:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:05,076 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-08-22 01:27:05,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:27:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-08-22 01:27:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 01:27:05,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:05,078 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:05,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:27:05,078 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:05,078 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-08-22 01:27:05,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:05,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196096587] [2020-08-22 01:27:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:05,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:05,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196096587] [2020-08-22 01:27:05,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:05,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:27:05,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196600555] [2020-08-22 01:27:05,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:27:05,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:05,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:27:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:27:05,251 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-08-22 01:27:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:05,644 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-08-22 01:27:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:27:05,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-22 01:27:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:05,646 INFO L225 Difference]: With dead ends: 95 [2020-08-22 01:27:05,647 INFO L226 Difference]: Without dead ends: 91 [2020-08-22 01:27:05,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:27:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-22 01:27:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-08-22 01:27:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 01:27:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-08-22 01:27:05,656 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-08-22 01:27:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:05,657 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-08-22 01:27:05,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:27:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-08-22 01:27:05,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 01:27:05,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:05,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:05,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:27:05,659 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:05,660 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-08-22 01:27:05,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:05,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765173631] [2020-08-22 01:27:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:05,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765173631] [2020-08-22 01:27:05,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:05,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:27:05,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678547654] [2020-08-22 01:27:05,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:27:05,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:27:05,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:27:05,920 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-08-22 01:27:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:06,381 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-08-22 01:27:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:27:06,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-22 01:27:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:06,383 INFO L225 Difference]: With dead ends: 99 [2020-08-22 01:27:06,384 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 01:27:06,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:27:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 01:27:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-08-22 01:27:06,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 01:27:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-08-22 01:27:06,392 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-08-22 01:27:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:06,392 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-08-22 01:27:06,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:27:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-08-22 01:27:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 01:27:06,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:06,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:06,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:27:06,394 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-08-22 01:27:06,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:06,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451096232] [2020-08-22 01:27:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:06,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:06,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451096232] [2020-08-22 01:27:06,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:06,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:27:06,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487663305] [2020-08-22 01:27:06,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:27:06,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:27:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:27:06,637 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-08-22 01:27:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:07,041 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-08-22 01:27:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:27:07,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-22 01:27:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:07,043 INFO L225 Difference]: With dead ends: 101 [2020-08-22 01:27:07,044 INFO L226 Difference]: Without dead ends: 91 [2020-08-22 01:27:07,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:27:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-22 01:27:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-08-22 01:27:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 01:27:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-08-22 01:27:07,050 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-08-22 01:27:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:07,050 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-08-22 01:27:07,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:27:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-08-22 01:27:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 01:27:07,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:07,051 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:07,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:27:07,052 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:07,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-08-22 01:27:07,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:07,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755059039] [2020-08-22 01:27:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:07,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755059039] [2020-08-22 01:27:07,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:07,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:27:07,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375394189] [2020-08-22 01:27:07,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:27:07,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:27:07,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:27:07,253 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-08-22 01:27:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:07,682 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-22 01:27:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:27:07,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-22 01:27:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:07,684 INFO L225 Difference]: With dead ends: 94 [2020-08-22 01:27:07,684 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 01:27:07,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:27:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 01:27:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-08-22 01:27:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 01:27:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-08-22 01:27:07,691 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-08-22 01:27:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:07,692 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-08-22 01:27:07,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:27:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-08-22 01:27:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 01:27:07,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:07,702 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:07,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:27:07,702 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-08-22 01:27:07,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:07,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510417636] [2020-08-22 01:27:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:07,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:07,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510417636] [2020-08-22 01:27:07,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:07,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:27:07,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193786799] [2020-08-22 01:27:07,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:27:07,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:27:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:27:07,905 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 13 states. [2020-08-22 01:27:08,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:08,514 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-22 01:27:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:27:08,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-22 01:27:08,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:08,516 INFO L225 Difference]: With dead ends: 94 [2020-08-22 01:27:08,516 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 01:27:08,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:27:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 01:27:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-08-22 01:27:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 01:27:08,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-08-22 01:27:08,524 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 39 [2020-08-22 01:27:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:08,526 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-08-22 01:27:08,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:27:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-08-22 01:27:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 01:27:08,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:08,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:08,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:27:08,532 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-08-22 01:27:08,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:08,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567394318] [2020-08-22 01:27:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:08,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:08,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567394318] [2020-08-22 01:27:08,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:08,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:27:08,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790100723] [2020-08-22 01:27:08,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:27:08,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:08,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:27:08,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:27:08,750 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 13 states. [2020-08-22 01:27:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:09,455 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2020-08-22 01:27:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:27:09,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-22 01:27:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:09,457 INFO L225 Difference]: With dead ends: 107 [2020-08-22 01:27:09,457 INFO L226 Difference]: Without dead ends: 103 [2020-08-22 01:27:09,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:27:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-22 01:27:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-08-22 01:27:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 01:27:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-08-22 01:27:09,468 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 39 [2020-08-22 01:27:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:09,469 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-08-22 01:27:09,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:27:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-08-22 01:27:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 01:27:09,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:09,470 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:09,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:27:09,470 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:09,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2037263357, now seen corresponding path program 1 times [2020-08-22 01:27:09,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:09,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821806792] [2020-08-22 01:27:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:09,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:09,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821806792] [2020-08-22 01:27:09,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:09,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:27:09,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470172007] [2020-08-22 01:27:09,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:27:09,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:27:09,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:27:09,681 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 13 states. [2020-08-22 01:27:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:10,204 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2020-08-22 01:27:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:27:10,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-22 01:27:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:10,206 INFO L225 Difference]: With dead ends: 109 [2020-08-22 01:27:10,206 INFO L226 Difference]: Without dead ends: 101 [2020-08-22 01:27:10,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:27:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-22 01:27:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-08-22 01:27:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 01:27:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-08-22 01:27:10,212 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 41 [2020-08-22 01:27:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:10,213 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-08-22 01:27:10,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:27:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-08-22 01:27:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 01:27:10,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:10,214 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:10,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:27:10,214 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-08-22 01:27:10,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:10,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658116828] [2020-08-22 01:27:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:10,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:27:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:27:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:27:10,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658116828] [2020-08-22 01:27:10,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:27:10,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:27:10,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527132294] [2020-08-22 01:27:10,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:27:10,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:27:10,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:27:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:27:10,579 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 13 states. [2020-08-22 01:27:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:27:11,320 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-08-22 01:27:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:27:11,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-22 01:27:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:27:11,322 INFO L225 Difference]: With dead ends: 116 [2020-08-22 01:27:11,322 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 01:27:11,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:27:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 01:27:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-08-22 01:27:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 01:27:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-08-22 01:27:11,330 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 41 [2020-08-22 01:27:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:27:11,331 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-08-22 01:27:11,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:27:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-08-22 01:27:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 01:27:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:27:11,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:27:11,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:27:11,332 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:27:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:27:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-08-22 01:27:11,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:27:11,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656811498] [2020-08-22 01:27:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:27:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 01:27:11,353 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 01:27:11,353 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 01:27:11,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:27:11,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:27:11 BoogieIcfgContainer [2020-08-22 01:27:11,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:27:11,381 INFO L168 Benchmark]: Toolchain (without parser) took 11020.06 ms. Allocated memory was 139.5 MB in the beginning and 313.5 MB in the end (delta: 174.1 MB). Free memory was 100.8 MB in the beginning and 165.5 MB in the end (delta: -64.7 MB). Peak memory consumption was 109.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:27:11,382 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 01:27:11,382 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.82 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 167.8 MB in the end (delta: -67.3 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-08-22 01:27:11,383 INFO L168 Benchmark]: Boogie Preprocessor took 103.89 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 164.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:27:11,384 INFO L168 Benchmark]: RCFGBuilder took 925.20 ms. Allocated memory is still 201.9 MB. Free memory was 163.9 MB in the beginning and 107.7 MB in the end (delta: 56.2 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2020-08-22 01:27:11,385 INFO L168 Benchmark]: TraceAbstraction took 9257.11 ms. Allocated memory was 201.9 MB in the beginning and 313.5 MB in the end (delta: 111.7 MB). Free memory was 107.0 MB in the beginning and 165.5 MB in the end (delta: -58.4 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-08-22 01:27:11,389 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 728.82 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 167.8 MB in the end (delta: -67.3 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.89 ms. Allocated memory is still 201.9 MB. Free memory was 167.8 MB in the beginning and 164.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 925.20 ms. Allocated memory is still 201.9 MB. Free memory was 163.9 MB in the beginning and 107.7 MB in the end (delta: 56.2 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9257.11 ms. Allocated memory was 201.9 MB in the beginning and 313.5 MB in the end (delta: 111.7 MB). Free memory was 107.0 MB in the beginning and 165.5 MB in the end (delta: -58.4 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 855 SDtfs, 581 SDslu, 3411 SDs, 0 SdLazy, 3002 SolverSat, 254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 559 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 106880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 25/71 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...