/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:28:44,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:28:44,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:28:44,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:28:44,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:28:44,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:28:44,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:28:44,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:28:44,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:28:44,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:28:44,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:28:44,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:28:44,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:28:44,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:28:44,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:28:44,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:28:44,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:28:44,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:28:44,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:28:44,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:28:44,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:28:44,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:28:44,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:28:44,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:28:44,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:28:44,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:28:44,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:28:44,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:28:44,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:28:44,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:28:44,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:28:44,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:28:44,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:28:44,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:28:44,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:28:44,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:28:44,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:28:44,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:28:44,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:28:44,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:28:44,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:28:44,128 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 05:28:44,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:28:44,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:28:44,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:28:44,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:28:44,160 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:28:44,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:28:44,161 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:28:44,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:28:44,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:28:44,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:28:44,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:28:44,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:28:44,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:28:44,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:28:44,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:28:44,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:28:44,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:28:44,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:28:44,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:28:44,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:28:44,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:28:44,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:28:44,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:28:44,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:28:44,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:28:44,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:28:44,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:28:44,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:28:44,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:28:44,167 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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:28:44,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:28:44,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:28:44,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:28:44,505 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:28:44,505 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:28:44,506 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 05:28:44,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ed1a20e5/bcc30c31bc4d46abac4e36ed949e21d3/FLAGfaf5186cf [2020-08-22 05:28:45,106 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:28:45,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 05:28:45,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ed1a20e5/bcc30c31bc4d46abac4e36ed949e21d3/FLAGfaf5186cf [2020-08-22 05:28:45,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ed1a20e5/bcc30c31bc4d46abac4e36ed949e21d3 [2020-08-22 05:28:45,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:28:45,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:28:45,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:28:45,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:28:45,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:28:45,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:28:45" (1/1) ... [2020-08-22 05:28:45,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7225e1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:45, skipping insertion in model container [2020-08-22 05:28:45,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:28:45" (1/1) ... [2020-08-22 05:28:45,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:28:45,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:28:45,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:28:45,918 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:28:45,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:28:46,059 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:28:46,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46 WrapperNode [2020-08-22 05:28:46,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:28:46,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:28:46,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:28:46,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:28:46,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... [2020-08-22 05:28:46,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... [2020-08-22 05:28:46,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... [2020-08-22 05:28:46,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... [2020-08-22 05:28:46,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... [2020-08-22 05:28:46,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... [2020-08-22 05:28:46,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... [2020-08-22 05:28:46,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:28:46,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:28:46,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:28:46,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:28:46,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:28:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:28:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:28:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 05:28:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 05:28:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-22 05:28:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-22 05:28:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-22 05:28:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 05:28:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:28:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:28:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:28:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 05:28:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 05:28:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 05:28:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 05:28:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 05:28:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 05:28:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 05:28:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 05:28:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 05:28:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 05:28:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 05:28:46,221 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 05:28:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 05:28:46,222 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 05:28:46,224 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 05:28:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 05:28:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 05:28:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 05:28:46,225 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-22 05:28:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-22 05:28:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-22 05:28:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 05:28:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 05:28:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 05:28:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 05:28:46,226 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 05:28:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 05:28:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 05:28:46,227 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 05:28:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 05:28:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 05:28:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 05:28:46,228 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 05:28:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 05:28:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 05:28:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 05:28:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 05:28:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 05:28:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 05:28:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 05:28:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 05:28:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 05:28:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 05:28:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 05:28:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 05:28:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 05:28:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 05:28:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 05:28:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 05:28:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 05:28:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 05:28:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 05:28:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 05:28:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 05:28:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 05:28:46,233 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 05:28:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 05:28:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 05:28:46,234 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 05:28:46,235 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 05:28:46,235 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 05:28:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 05:28:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 05:28:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 05:28:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 05:28:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 05:28:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 05:28:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 05:28:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 05:28:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 05:28:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 05:28:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 05:28:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 05:28:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 05:28:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 05:28:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 05:28:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 05:28:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 05:28:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 05:28:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 05:28:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 05:28:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:28:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 05:28:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 05:28:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 05:28:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 05:28:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 05:28:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:28:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:28:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 05:28:46,634 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 05:28:46,790 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:28:46,790 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 05:28:46,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:28:46 BoogieIcfgContainer [2020-08-22 05:28:46,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:28:46,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:28:46,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:28:46,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:28:46,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:28:45" (1/3) ... [2020-08-22 05:28:46,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff6a631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:28:46, skipping insertion in model container [2020-08-22 05:28:46,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:46" (2/3) ... [2020-08-22 05:28:46,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff6a631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:28:46, skipping insertion in model container [2020-08-22 05:28:46,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:28:46" (3/3) ... [2020-08-22 05:28:46,802 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-08-22 05:28:46,813 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:28:46,821 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:28:46,835 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:28:46,859 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:28:46,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:28:46,860 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:28:46,860 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:28:46,860 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:28:46,860 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:28:46,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:28:46,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:28:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 05:28:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 05:28:46,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:46,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:46,885 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-08-22 05:28:46,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:46,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686249728] [2020-08-22 05:28:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,084 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 05:28:47,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686249728] [2020-08-22 05:28:47,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:47,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:47,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061850180] [2020-08-22 05:28:47,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:47,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:47,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:47,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:47,111 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 05:28:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:47,225 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-22 05:28:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:47,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 05:28:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:47,237 INFO L225 Difference]: With dead ends: 56 [2020-08-22 05:28:47,237 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 05:28:47,241 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 05:28:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 05:28:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 05:28:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 05:28:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-08-22 05:28:47,282 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-08-22 05:28:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:47,283 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-08-22 05:28:47,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-08-22 05:28:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 05:28:47,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:47,284 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 05:28:47,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:28:47,285 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-08-22 05:28:47,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:47,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453545510] [2020-08-22 05:28:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,419 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 05:28:47,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453545510] [2020-08-22 05:28:47,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:47,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:28:47,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820591944] [2020-08-22 05:28:47,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:28:47,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:28:47,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:28:47,423 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-08-22 05:28:47,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:47,602 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-22 05:28:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:28:47,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 05:28:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:47,606 INFO L225 Difference]: With dead ends: 50 [2020-08-22 05:28:47,607 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 05:28:47,608 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 05:28:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 05:28:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-08-22 05:28:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 05:28:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-08-22 05:28:47,625 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-08-22 05:28:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:47,626 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-08-22 05:28:47,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:28:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-08-22 05:28:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:47,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:47,629 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] [2020-08-22 05:28:47,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:28:47,631 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-08-22 05:28:47,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:47,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742466963] [2020-08-22 05:28:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:47,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742466963] [2020-08-22 05:28:47,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:47,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:28:47,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842684251] [2020-08-22 05:28:47,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:28:47,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:47,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:28:47,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:28:47,757 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-08-22 05:28:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:47,882 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-22 05:28:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:28:47,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 05:28:47,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:47,884 INFO L225 Difference]: With dead ends: 52 [2020-08-22 05:28:47,884 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 05:28:47,885 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 05:28:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 05:28:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-08-22 05:28:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 05:28:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-08-22 05:28:47,892 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-08-22 05:28:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:47,892 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-08-22 05:28:47,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:28:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-08-22 05:28:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:47,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:47,894 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] [2020-08-22 05:28:47,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:28:47,894 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:47,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-08-22 05:28:47,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:47,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343226538] [2020-08-22 05:28:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:47,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343226538] [2020-08-22 05:28:47,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:47,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 05:28:47,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709722707] [2020-08-22 05:28:47,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:28:47,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:28:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:28:47,981 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-08-22 05:28:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:48,083 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-22 05:28:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:28:48,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 05:28:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:48,085 INFO L225 Difference]: With dead ends: 52 [2020-08-22 05:28:48,085 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 05:28:48,086 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 05:28:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 05:28:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-08-22 05:28:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 05:28:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 05:28:48,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-08-22 05:28:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:48,092 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 05:28:48,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:28:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 05:28:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:48,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:48,093 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] [2020-08-22 05:28:48,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:28:48,094 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:48,094 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-08-22 05:28:48,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:48,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805772609] [2020-08-22 05:28:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:48,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:48,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805772609] [2020-08-22 05:28:48,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:48,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:28:48,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130946710] [2020-08-22 05:28:48,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:28:48,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:28:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:28:48,284 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-08-22 05:28:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:48,549 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-22 05:28:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:28:48,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-22 05:28:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:48,551 INFO L225 Difference]: With dead ends: 54 [2020-08-22 05:28:48,551 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 05:28:48,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:28:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 05:28:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-08-22 05:28:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 05:28:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-08-22 05:28:48,559 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-08-22 05:28:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:48,559 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-08-22 05:28:48,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:28:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-08-22 05:28:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:48,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:48,574 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] [2020-08-22 05:28:48,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:28:48,574 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:48,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-08-22 05:28:48,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:48,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496152454] [2020-08-22 05:28:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:48,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:48,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496152454] [2020-08-22 05:28:48,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:48,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:28:48,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256314035] [2020-08-22 05:28:48,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:28:48,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:48,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:28:48,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:28:48,690 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-08-22 05:28:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:48,954 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-08-22 05:28:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:28:48,955 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-22 05:28:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:48,956 INFO L225 Difference]: With dead ends: 63 [2020-08-22 05:28:48,956 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 05:28:48,957 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 05:28:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 05:28:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-08-22 05:28:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 05:28:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-08-22 05:28:48,965 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-08-22 05:28:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:48,965 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-08-22 05:28:48,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:28:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-08-22 05:28:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 05:28:48,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:48,967 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] [2020-08-22 05:28:48,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:28:48,967 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:48,971 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-08-22 05:28:48,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:48,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491571134] [2020-08-22 05:28:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:49,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:49,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491571134] [2020-08-22 05:28:49,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:49,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:28:49,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859193906] [2020-08-22 05:28:49,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:28:49,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:49,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:28:49,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:28:49,190 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-08-22 05:28:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:49,473 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-08-22 05:28:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:28:49,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-22 05:28:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:49,475 INFO L225 Difference]: With dead ends: 67 [2020-08-22 05:28:49,475 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 05:28:49,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 05:28:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 05:28:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-08-22 05:28:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 05:28:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-08-22 05:28:49,482 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-08-22 05:28:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:49,482 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-08-22 05:28:49,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:28:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-08-22 05:28:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:28:49,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:49,484 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] [2020-08-22 05:28:49,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:28:49,484 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:49,485 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-08-22 05:28:49,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:49,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130277637] [2020-08-22 05:28:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:49,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:49,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130277637] [2020-08-22 05:28:49,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:49,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:28:49,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687767779] [2020-08-22 05:28:49,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:28:49,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:49,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:28:49,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:28:49,653 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 10 states. [2020-08-22 05:28:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:49,931 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-08-22 05:28:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:28:49,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 05:28:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:49,933 INFO L225 Difference]: With dead ends: 69 [2020-08-22 05:28:49,933 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 05:28:49,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 05:28:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 05:28:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-08-22 05:28:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 05:28:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-08-22 05:28:49,949 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-08-22 05:28:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:49,949 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-08-22 05:28:49,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:28:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-08-22 05:28:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:28:49,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:49,950 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] [2020-08-22 05:28:49,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:28:49,954 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:49,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-08-22 05:28:49,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:49,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174742634] [2020-08-22 05:28:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:50,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:50,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174742634] [2020-08-22 05:28:50,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:50,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:28:50,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811141963] [2020-08-22 05:28:50,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:28:50,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:50,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:28:50,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:28:50,149 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-08-22 05:28:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:50,413 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 05:28:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:28:50,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 05:28:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:50,415 INFO L225 Difference]: With dead ends: 62 [2020-08-22 05:28:50,415 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 05:28:50,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 05:28:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 05:28:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-08-22 05:28:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 05:28:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-08-22 05:28:50,420 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-08-22 05:28:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:50,421 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-08-22 05:28:50,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:28:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-08-22 05:28:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:28:50,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:50,422 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] [2020-08-22 05:28:50,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:28:50,423 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-08-22 05:28:50,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:50,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145717022] [2020-08-22 05:28:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:50,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:50,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145717022] [2020-08-22 05:28:50,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:50,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:28:50,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982241161] [2020-08-22 05:28:50,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:28:50,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:50,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:28:50,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:28:50,615 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 13 states. [2020-08-22 05:28:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:50,999 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 05:28:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 05:28:51,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-22 05:28:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:51,001 INFO L225 Difference]: With dead ends: 62 [2020-08-22 05:28:51,001 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 05:28:51,002 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 05:28:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 05:28:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-08-22 05:28:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 05:28:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-22 05:28:51,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2020-08-22 05:28:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:51,010 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-22 05:28:51,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:28:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-22 05:28:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:28:51,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:51,019 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] [2020-08-22 05:28:51,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:28:51,019 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:51,020 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-08-22 05:28:51,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:51,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019621660] [2020-08-22 05:28:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:51,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:51,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019621660] [2020-08-22 05:28:51,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:51,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:28:51,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788926023] [2020-08-22 05:28:51,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:28:51,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:28:51,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:28:51,241 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-08-22 05:28:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:51,775 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-08-22 05:28:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 05:28:51,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-22 05:28:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:51,777 INFO L225 Difference]: With dead ends: 75 [2020-08-22 05:28:51,777 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 05:28:51,779 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 05:28:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 05:28:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-08-22 05:28:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 05:28:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-08-22 05:28:51,794 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 28 [2020-08-22 05:28:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:51,794 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-08-22 05:28:51,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:28:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-08-22 05:28:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 05:28:51,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:51,798 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] [2020-08-22 05:28:51,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:28:51,799 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1819088671, now seen corresponding path program 1 times [2020-08-22 05:28:51,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:51,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6865404] [2020-08-22 05:28:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:52,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:52,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6865404] [2020-08-22 05:28:52,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:52,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:28:52,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508633626] [2020-08-22 05:28:52,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:28:52,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:28:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:28:52,058 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 13 states. [2020-08-22 05:28:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:52,456 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-08-22 05:28:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 05:28:52,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 05:28:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:52,457 INFO L225 Difference]: With dead ends: 77 [2020-08-22 05:28:52,457 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 05:28:52,458 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 05:28:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 05:28:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-08-22 05:28:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 05:28:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-08-22 05:28:52,464 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 30 [2020-08-22 05:28:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:52,465 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-08-22 05:28:52,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:28:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-08-22 05:28:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 05:28:52,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:52,466 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] [2020-08-22 05:28:52,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 05:28:52,467 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-08-22 05:28:52,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:52,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866661197] [2020-08-22 05:28:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:52,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:52,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866661197] [2020-08-22 05:28:52,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:52,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:28:52,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027702440] [2020-08-22 05:28:52,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:28:52,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:28:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:28:52,724 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 13 states. [2020-08-22 05:28:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:53,308 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-08-22 05:28:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 05:28:53,309 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 05:28:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:53,310 INFO L225 Difference]: With dead ends: 84 [2020-08-22 05:28:53,310 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 05:28:53,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:28:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 05:28:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-22 05:28:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 05:28:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-08-22 05:28:53,317 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 30 [2020-08-22 05:28:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:53,318 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-08-22 05:28:53,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:28:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-08-22 05:28:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 05:28:53,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:53,319 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] [2020-08-22 05:28:53,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 05:28:53,319 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:53,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:53,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-08-22 05:28:53,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:53,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722952351] [2020-08-22 05:28:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 05:28:53,342 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 05:28:53,343 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 05:28:53,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 05:28:53,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:28:53 BoogieIcfgContainer [2020-08-22 05:28:53,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:28:53,371 INFO L168 Benchmark]: Toolchain (without parser) took 7942.49 ms. Allocated memory was 145.8 MB in the beginning and 314.6 MB in the end (delta: 168.8 MB). Free memory was 100.3 MB in the beginning and 250.0 MB in the end (delta: -149.7 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:53,372 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 05:28:53,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.89 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 100.1 MB in the beginning and 166.2 MB in the end (delta: -66.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:53,374 INFO L168 Benchmark]: Boogie Preprocessor took 88.54 ms. Allocated memory is still 201.9 MB. Free memory was 166.2 MB in the beginning and 162.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:53,374 INFO L168 Benchmark]: RCFGBuilder took 643.05 ms. Allocated memory is still 201.9 MB. Free memory was 162.8 MB in the beginning and 117.7 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:53,375 INFO L168 Benchmark]: TraceAbstraction took 6573.05 ms. Allocated memory was 201.9 MB in the beginning and 314.6 MB in the end (delta: 112.7 MB). Free memory was 117.0 MB in the beginning and 250.0 MB in the end (delta: -133.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 05:28:53,378 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 632.89 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 100.1 MB in the beginning and 166.2 MB in the end (delta: -66.1 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.54 ms. Allocated memory is still 201.9 MB. Free memory was 166.2 MB in the beginning and 162.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 643.05 ms. Allocated memory is still 201.9 MB. Free memory was 162.8 MB in the beginning and 117.7 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6573.05 ms. Allocated memory was 201.9 MB in the beginning and 314.6 MB in the end (delta: 112.7 MB). Free memory was 117.0 MB in the beginning and 250.0 MB in the end (delta: -133.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 265 SDtfs, 552 SDslu, 1158 SDs, 0 SdLazy, 2018 SolverSat, 252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=13, 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, 13 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 356 NumberOfCodeBlocks, 356 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 313 ConstructedInterpolants, 0 QuantifiedInterpolants, 70246 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 12/58 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...