/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:56:06,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:56:06,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:56:06,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:56:06,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:56:06,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:56:06,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:56:06,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:56:06,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:56:06,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:56:06,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:56:06,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:56:06,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:56:06,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:56:06,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:56:06,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:56:06,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:56:06,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:56:06,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:56:06,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:56:06,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:56:06,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:56:06,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:56:06,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:56:06,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:56:06,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:56:06,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:56:06,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:56:06,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:56:06,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:56:06,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:56:06,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:56:06,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:56:06,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:56:06,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:56:06,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:56:06,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:56:06,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:56:06,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:56:06,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:56:06,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:56:06,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:56:06,301 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:56:06,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:56:06,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:56:06,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:56:06,304 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:56:06,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:56:06,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:56:06,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:56:06,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:56:06,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:56:06,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:56:06,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:56:06,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:56:06,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:56:06,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:56:06,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:56:06,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:56:06,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:56:06,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:56:06,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:56:06,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:56:06,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:56:06,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:56:06,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:56:06,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:56:06,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:56:06,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:56:06,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:56:06,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:56:06,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:56:06,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:56:06,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:56:06,700 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:56:06,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:56:06,703 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:56:06,703 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-08-21 14:56:06,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3178508df/1f347a14681c495689978c0d8c559dea/FLAG1108720c2 [2020-08-21 14:56:07,344 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:56:07,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-08-21 14:56:07,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3178508df/1f347a14681c495689978c0d8c559dea/FLAG1108720c2 [2020-08-21 14:56:07,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3178508df/1f347a14681c495689978c0d8c559dea [2020-08-21 14:56:07,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:56:07,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:56:07,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:07,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:56:07,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:56:07,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:07" (1/1) ... [2020-08-21 14:56:07,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eab0e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:07, skipping insertion in model container [2020-08-21 14:56:07,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:07" (1/1) ... [2020-08-21 14:56:07,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:56:07,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:56:08,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:08,123 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:56:08,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:08,244 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:56:08,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08 WrapperNode [2020-08-21 14:56:08,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:08,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:56:08,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:56:08,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:56:08,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... [2020-08-21 14:56:08,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... [2020-08-21 14:56:08,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... [2020-08-21 14:56:08,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... [2020-08-21 14:56:08,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... [2020-08-21 14:56:08,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... [2020-08-21 14:56:08,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... [2020-08-21 14:56:08,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:56:08,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:56:08,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:56:08,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:56:08,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:56:08,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:56:08,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:56:08,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 14:56:08,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 14:56:08,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-21 14:56:08,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-21 14:56:08,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-21 14:56:08,378 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-21 14:56:08,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:56:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:56:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:56:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 14:56:08,378 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 14:56:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 14:56:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 14:56:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 14:56:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 14:56:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 14:56:08,379 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 14:56:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 14:56:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 14:56:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 14:56:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 14:56:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 14:56:08,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 14:56:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 14:56:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 14:56:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 14:56:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 14:56:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-21 14:56:08,381 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-21 14:56:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-21 14:56:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 14:56:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 14:56:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 14:56:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 14:56:08,382 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 14:56:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 14:56:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 14:56:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 14:56:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 14:56:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 14:56:08,383 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 14:56:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 14:56:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 14:56:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 14:56:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 14:56:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 14:56:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 14:56:08,384 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 14:56:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 14:56:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 14:56:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 14:56:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 14:56:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 14:56:08,385 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 14:56:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 14:56:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 14:56:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 14:56:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 14:56:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 14:56:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 14:56:08,386 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 14:56:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 14:56:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 14:56:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 14:56:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:56:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 14:56:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 14:56:08,387 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:56:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 14:56:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 14:56:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 14:56:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 14:56:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 14:56:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 14:56:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 14:56:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 14:56:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 14:56:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 14:56:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 14:56:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 14:56:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 14:56:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 14:56:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 14:56:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 14:56:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 14:56:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 14:56:08,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 14:56:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 14:56:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 14:56:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 14:56:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 14:56:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 14:56:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 14:56:08,391 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 14:56:08,392 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 14:56:08,392 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 14:56:08,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 14:56:08,392 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 14:56:08,392 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 14:56:08,392 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 14:56:08,392 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 14:56:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 14:56:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 14:56:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 14:56:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 14:56:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 14:56:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 14:56:08,393 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 14:56:08,394 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 14:56:08,394 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 14:56:08,394 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 14:56:08,394 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 14:56:08,394 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 14:56:08,394 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 14:56:08,394 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 14:56:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 14:56:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-21 14:56:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:56:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:56:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:56:08,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:56:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:56:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:56:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:56:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:56:08,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:56:08,777 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-21 14:56:08,940 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:56:08,940 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 14:56:08,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:08 BoogieIcfgContainer [2020-08-21 14:56:08,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:56:08,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:56:08,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:56:08,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:56:08,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:56:07" (1/3) ... [2020-08-21 14:56:08,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1761369a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:08, skipping insertion in model container [2020-08-21 14:56:08,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:08" (2/3) ... [2020-08-21 14:56:08,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1761369a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:08, skipping insertion in model container [2020-08-21 14:56:08,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:08" (3/3) ... [2020-08-21 14:56:08,954 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-08-21 14:56:08,962 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:56:08,970 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:56:08,982 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:56:09,004 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:56:09,005 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:56:09,005 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:56:09,005 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:56:09,005 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:56:09,006 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:56:09,006 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:56:09,006 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:56:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 14:56:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 14:56:09,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:09,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:09,032 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:09,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-08-21 14:56:09,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:09,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313735861] [2020-08-21 14:56:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:09,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313735861] [2020-08-21 14:56:09,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:09,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:09,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567595444] [2020-08-21 14:56:09,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:09,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:09,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:09,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:09,285 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-21 14:56:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:09,409 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-21 14:56:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:09,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 14:56:09,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:09,421 INFO L225 Difference]: With dead ends: 56 [2020-08-21 14:56:09,421 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 14:56:09,425 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 [2020-08-21 14:56:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 14:56:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 14:56:09,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 14:56:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-08-21 14:56:09,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-08-21 14:56:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:09,471 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-08-21 14:56:09,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-08-21 14:56:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:09,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:09,473 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] [2020-08-21 14:56:09,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:56:09,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-08-21 14:56:09,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:09,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664535842] [2020-08-21 14:56:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:09,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664535842] [2020-08-21 14:56:09,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:09,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:56:09,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028778786] [2020-08-21 14:56:09,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:56:09,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:09,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:56:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:09,632 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-08-21 14:56:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:09,781 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 14:56:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:56:09,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 14:56:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:09,785 INFO L225 Difference]: With dead ends: 50 [2020-08-21 14:56:09,785 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 14:56:09,786 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 [2020-08-21 14:56:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 14:56:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-08-21 14:56:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 14:56:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-08-21 14:56:09,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-08-21 14:56:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:09,796 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-08-21 14:56:09,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:56:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-08-21 14:56:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:56:09,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:09,798 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] [2020-08-21 14:56:09,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:56:09,798 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-08-21 14:56:09,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:09,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395819318] [2020-08-21 14:56:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:09,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395819318] [2020-08-21 14:56:09,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:09,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:56:09,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361366301] [2020-08-21 14:56:09,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:56:09,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:56:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:09,928 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-08-21 14:56:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:10,080 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-21 14:56:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:56:10,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 14:56:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:10,082 INFO L225 Difference]: With dead ends: 52 [2020-08-21 14:56:10,082 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 14:56:10,082 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 [2020-08-21 14:56:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 14:56:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-08-21 14:56:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 14:56:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-08-21 14:56:10,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-08-21 14:56:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:10,090 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-08-21 14:56:10,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:56:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-08-21 14:56:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:56:10,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:10,091 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] [2020-08-21 14:56:10,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:56:10,092 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-08-21 14:56:10,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:10,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214120961] [2020-08-21 14:56:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:10,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214120961] [2020-08-21 14:56:10,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:10,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:56:10,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162002892] [2020-08-21 14:56:10,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:56:10,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:56:10,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:10,177 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-08-21 14:56:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:10,289 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-21 14:56:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:56:10,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 14:56:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:10,291 INFO L225 Difference]: With dead ends: 52 [2020-08-21 14:56:10,291 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 14:56:10,291 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 [2020-08-21 14:56:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 14:56:10,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-08-21 14:56:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 14:56:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 14:56:10,297 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-08-21 14:56:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:10,297 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 14:56:10,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:56:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 14:56:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:56:10,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:10,299 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] [2020-08-21 14:56:10,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:56:10,300 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-08-21 14:56:10,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:10,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154014582] [2020-08-21 14:56:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:10,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154014582] [2020-08-21 14:56:10,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:10,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:56:10,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132978236] [2020-08-21 14:56:10,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:56:10,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:10,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:56:10,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:56:10,439 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-08-21 14:56:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:10,716 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-21 14:56:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:56:10,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-21 14:56:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:10,721 INFO L225 Difference]: With dead ends: 54 [2020-08-21 14:56:10,721 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 14:56:10,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:56:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 14:56:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-08-21 14:56:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 14:56:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-08-21 14:56:10,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-08-21 14:56:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:10,753 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-08-21 14:56:10,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:56:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-08-21 14:56:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:56:10,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:10,754 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] [2020-08-21 14:56:10,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:56:10,755 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:10,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-08-21 14:56:10,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:10,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937913303] [2020-08-21 14:56:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:10,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937913303] [2020-08-21 14:56:10,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:10,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:56:10,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283942149] [2020-08-21 14:56:10,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:56:10,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:56:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:56:10,958 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-08-21 14:56:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:11,218 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-08-21 14:56:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:56:11,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-21 14:56:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:11,219 INFO L225 Difference]: With dead ends: 63 [2020-08-21 14:56:11,219 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 14:56:11,220 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 [2020-08-21 14:56:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 14:56:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-08-21 14:56:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-21 14:56:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-08-21 14:56:11,227 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-08-21 14:56:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:11,227 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-08-21 14:56:11,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:56:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-08-21 14:56:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:56:11,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:11,229 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] [2020-08-21 14:56:11,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:56:11,229 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-08-21 14:56:11,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:11,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032671576] [2020-08-21 14:56:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:11,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:11,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032671576] [2020-08-21 14:56:11,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:11,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:56:11,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198430487] [2020-08-21 14:56:11,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:56:11,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:11,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:56:11,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:56:11,423 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-08-21 14:56:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:11,764 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-08-21 14:56:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:56:11,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-21 14:56:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:11,765 INFO L225 Difference]: With dead ends: 67 [2020-08-21 14:56:11,765 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 14:56:11,766 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 [2020-08-21 14:56:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 14:56:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-08-21 14:56:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 14:56:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-08-21 14:56:11,773 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-08-21 14:56:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:11,774 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-08-21 14:56:11,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:56:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-08-21 14:56:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:56:11,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:11,775 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] [2020-08-21 14:56:11,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:56:11,776 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-08-21 14:56:11,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:11,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026338749] [2020-08-21 14:56:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:11,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:11,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026338749] [2020-08-21 14:56:11,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:11,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:56:11,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555093560] [2020-08-21 14:56:11,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:56:11,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:56:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:56:11,932 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 10 states. [2020-08-21 14:56:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:12,218 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-08-21 14:56:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:56:12,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-21 14:56:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:12,220 INFO L225 Difference]: With dead ends: 69 [2020-08-21 14:56:12,220 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 14:56:12,221 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 [2020-08-21 14:56:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 14:56:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-08-21 14:56:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 14:56:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-08-21 14:56:12,231 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-08-21 14:56:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:12,231 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-08-21 14:56:12,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:56:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-08-21 14:56:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:56:12,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:12,234 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] [2020-08-21 14:56:12,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:56:12,235 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:12,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-08-21 14:56:12,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:12,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021387044] [2020-08-21 14:56:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:12,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:12,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021387044] [2020-08-21 14:56:12,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:12,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:56:12,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416437492] [2020-08-21 14:56:12,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:56:12,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:56:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:56:12,380 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-08-21 14:56:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:12,631 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-21 14:56:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:56:12,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-21 14:56:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:12,633 INFO L225 Difference]: With dead ends: 62 [2020-08-21 14:56:12,633 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 14:56:12,634 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 [2020-08-21 14:56:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 14:56:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-08-21 14:56:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 14:56:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-08-21 14:56:12,641 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-08-21 14:56:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:12,641 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-08-21 14:56:12,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:56:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-08-21 14:56:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:56:12,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:12,644 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] [2020-08-21 14:56:12,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:56:12,647 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:12,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:12,647 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-08-21 14:56:12,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:12,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168219446] [2020-08-21 14:56:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:12,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:12,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168219446] [2020-08-21 14:56:12,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:12,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:56:12,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608635906] [2020-08-21 14:56:12,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:56:12,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:56:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:56:12,915 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 13 states. [2020-08-21 14:56:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:13,304 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-21 14:56:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:56:13,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-21 14:56:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:13,305 INFO L225 Difference]: With dead ends: 62 [2020-08-21 14:56:13,305 INFO L226 Difference]: Without dead ends: 58 [2020-08-21 14:56:13,306 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 [2020-08-21 14:56:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-21 14:56:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-08-21 14:56:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 14:56:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-08-21 14:56:13,313 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2020-08-21 14:56:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:13,313 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-08-21 14:56:13,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:56:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-08-21 14:56:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:56:13,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:13,314 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] [2020-08-21 14:56:13,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:56:13,315 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-08-21 14:56:13,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:13,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902510141] [2020-08-21 14:56:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:13,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:13,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902510141] [2020-08-21 14:56:13,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:13,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:56:13,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324184947] [2020-08-21 14:56:13,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:56:13,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:56:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:56:13,481 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-08-21 14:56:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:13,982 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-08-21 14:56:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:56:13,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-08-21 14:56:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:13,984 INFO L225 Difference]: With dead ends: 75 [2020-08-21 14:56:13,984 INFO L226 Difference]: Without dead ends: 71 [2020-08-21 14:56:13,985 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 [2020-08-21 14:56:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-21 14:56:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2020-08-21 14:56:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 14:56:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-08-21 14:56:14,004 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 28 [2020-08-21 14:56:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:14,005 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-08-21 14:56:14,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:56:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-08-21 14:56:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:56:14,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:14,006 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] [2020-08-21 14:56:14,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:56:14,006 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1819088671, now seen corresponding path program 1 times [2020-08-21 14:56:14,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:14,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206284121] [2020-08-21 14:56:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:14,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206284121] [2020-08-21 14:56:14,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:14,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:56:14,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42289541] [2020-08-21 14:56:14,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:56:14,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:14,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:56:14,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:56:14,216 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 13 states. [2020-08-21 14:56:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:14,619 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-08-21 14:56:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:56:14,619 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-21 14:56:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:14,621 INFO L225 Difference]: With dead ends: 77 [2020-08-21 14:56:14,621 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 14:56:14,623 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 [2020-08-21 14:56:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 14:56:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-08-21 14:56:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 14:56:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-08-21 14:56:14,632 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 30 [2020-08-21 14:56:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:14,633 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-08-21 14:56:14,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:56:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-08-21 14:56:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:56:14,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:14,641 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] [2020-08-21 14:56:14,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:56:14,641 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-08-21 14:56:14,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:14,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10179433] [2020-08-21 14:56:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:14,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10179433] [2020-08-21 14:56:14,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:56:14,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:56:14,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089167870] [2020-08-21 14:56:14,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:56:14,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:14,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:56:14,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:56:14,924 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 13 states. [2020-08-21 14:56:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:15,553 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-08-21 14:56:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:56:15,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-21 14:56:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:15,554 INFO L225 Difference]: With dead ends: 84 [2020-08-21 14:56:15,554 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 14:56:15,555 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 [2020-08-21 14:56:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 14:56:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-21 14:56:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 14:56:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-08-21 14:56:15,562 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 30 [2020-08-21 14:56:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:15,562 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-08-21 14:56:15,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:56:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-08-21 14:56:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:56:15,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:15,563 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] [2020-08-21 14:56:15,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:56:15,564 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-08-21 14:56:15,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:15,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382408310] [2020-08-21 14:56:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:56:15,582 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:56:15,583 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:56:15,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:56:15,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:56:15 BoogieIcfgContainer [2020-08-21 14:56:15,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:56:15,608 INFO L168 Benchmark]: Toolchain (without parser) took 7978.83 ms. Allocated memory was 140.0 MB in the beginning and 318.8 MB in the end (delta: 178.8 MB). Free memory was 101.4 MB in the beginning and 239.1 MB in the end (delta: -137.7 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:15,608 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:56:15,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 615.87 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 170.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:15,610 INFO L168 Benchmark]: Boogie Preprocessor took 62.99 ms. Allocated memory is still 203.4 MB. Free memory was 170.0 MB in the beginning and 166.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:15,611 INFO L168 Benchmark]: RCFGBuilder took 635.13 ms. Allocated memory is still 203.4 MB. Free memory was 166.5 MB in the beginning and 121.9 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:15,612 INFO L168 Benchmark]: TraceAbstraction took 6659.41 ms. Allocated memory was 203.4 MB in the beginning and 318.8 MB in the end (delta: 115.3 MB). Free memory was 121.3 MB in the beginning and 239.1 MB in the end (delta: -117.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:56:15,615 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 615.87 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 170.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.99 ms. Allocated memory is still 203.4 MB. Free memory was 170.0 MB in the beginning and 166.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 635.13 ms. Allocated memory is still 203.4 MB. Free memory was 166.5 MB in the beginning and 121.9 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6659.41 ms. Allocated memory was 203.4 MB in the beginning and 318.8 MB in the end (delta: 115.3 MB). Free memory was 121.3 MB in the beginning and 239.1 MB in the end (delta: -117.8 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: 6.5s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 3.9s, 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, 2.5s 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...