/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:23:56,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:23:56,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:23:56,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:23:56,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:23:56,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:23:56,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:23:56,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:23:56,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:23:56,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:23:56,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:23:56,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:23:56,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:23:56,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:23:56,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:23:56,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:23:56,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:23:56,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:23:56,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:23:56,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:23:56,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:23:56,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:23:56,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:23:56,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:23:56,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:23:56,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:23:56,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:23:56,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:23:56,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:23:56,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:23:56,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:23:56,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:23:56,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:23:56,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:23:56,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:23:56,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:23:56,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:23:56,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:23:56,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:23:56,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:23:56,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:23:56,462 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 21:23:56,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:23:56,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:23:56,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:23:56,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:23:56,487 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:23:56,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:23:56,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:23:56,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:23:56,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:23:56,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:23:56,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:23:56,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:23:56,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:23:56,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:23:56,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:23:56,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:23:56,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:23:56,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:23:56,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:23:56,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:23:56,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:23:56,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:23:56,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:23:56,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:23:56,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:23:56,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:23:56,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:23:56,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:23:56,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:23:56,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:23:56,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:23:56,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:23:56,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:23:56,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:23:56,837 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:23:56,838 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-21 21:23:56,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bad8e482e/97344bf62fee46bca55be3a25bae96e4/FLAG5a8004930 [2020-08-21 21:23:57,355 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:23:57,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-08-21 21:23:57,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bad8e482e/97344bf62fee46bca55be3a25bae96e4/FLAG5a8004930 [2020-08-21 21:23:57,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bad8e482e/97344bf62fee46bca55be3a25bae96e4 [2020-08-21 21:23:57,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:23:57,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:23:57,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:23:57,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:23:57,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:23:57,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:23:57" (1/1) ... [2020-08-21 21:23:57,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723eb1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:57, skipping insertion in model container [2020-08-21 21:23:57,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:23:57" (1/1) ... [2020-08-21 21:23:57,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:23:57,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:23:58,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:23:58,217 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:23:58,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:23:58,340 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:23:58,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58 WrapperNode [2020-08-21 21:23:58,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:23:58,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:23:58,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:23:58,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:23:58,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (1/1) ... [2020-08-21 21:23:58,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (1/1) ... [2020-08-21 21:23:58,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (1/1) ... [2020-08-21 21:23:58,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (1/1) ... [2020-08-21 21:23:58,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (1/1) ... [2020-08-21 21:23:58,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (1/1) ... [2020-08-21 21:23:58,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (1/1) ... [2020-08-21 21:23:58,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:23:58,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:23:58,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:23:58,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:23:58,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (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 21:23:58,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:23:58,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:23:58,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 21:23:58,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 21:23:58,494 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-21 21:23:58,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:23:58,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:23:58,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:23:58,496 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 21:23:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 21:23:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 21:23:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 21:23:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 21:23:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 21:23:58,497 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 21:23:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 21:23:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 21:23:58,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 21:23:58,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 21:23:58,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 21:23:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 21:23:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 21:23:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 21:23:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 21:23:58,500 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 21:23:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 21:23:58,501 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 21:23:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 21:23:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 21:23:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 21:23:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 21:23:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 21:23:58,502 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 21:23:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 21:23:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 21:23:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 21:23:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 21:23:58,503 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 21:23:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 21:23:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 21:23:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 21:23:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 21:23:58,504 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 21:23:58,505 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 21:23:58,505 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 21:23:58,506 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 21:23:58,506 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 21:23:58,506 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 21:23:58,506 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 21:23:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 21:23:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 21:23:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 21:23:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 21:23:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 21:23:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 21:23:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 21:23:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 21:23:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 21:23:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 21:23:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 21:23:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 21:23:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 21:23:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 21:23:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 21:23:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 21:23:58,509 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 21:23:58,510 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 21:23:58,511 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 21:23:58,511 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 21:23:58,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 21:23:58,512 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 21:23:58,512 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 21:23:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 21:23:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 21:23:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 21:23:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 21:23:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 21:23:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 21:23:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 21:23:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 21:23:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 21:23:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 21:23:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 21:23:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 21:23:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 21:23:58,517 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 21:23:58,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 21:23:58,517 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 21:23:58,517 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 21:23:58,517 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 21:23:58,517 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 21:23:58,517 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 21:23:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 21:23:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 21:23:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 21:23:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 21:23:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 21:23:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 21:23:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 21:23:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 21:23:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 21:23:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 21:23:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 21:23:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 21:23:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 21:23:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 21:23:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-21 21:23:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:23:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 21:23:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 21:23:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 21:23:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:23:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:23:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:23:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:23:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:23:58,918 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-21 21:23:59,279 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:23:59,279 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-21 21:23:59,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:23:59 BoogieIcfgContainer [2020-08-21 21:23:59,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:23:59,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:23:59,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:23:59,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:23:59,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:23:57" (1/3) ... [2020-08-21 21:23:59,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afc49d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:23:59, skipping insertion in model container [2020-08-21 21:23:59,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:23:58" (2/3) ... [2020-08-21 21:23:59,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afc49d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:23:59, skipping insertion in model container [2020-08-21 21:23:59,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:23:59" (3/3) ... [2020-08-21 21:23:59,292 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-08-21 21:23:59,303 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:23:59,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:23:59,327 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:23:59,359 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:23:59,359 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:23:59,359 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:23:59,369 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:23:59,369 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:23:59,369 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:23:59,370 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:23:59,370 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:23:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-08-21 21:23:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:23:59,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:23:59,408 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 21:23:59,408 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:23:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:23:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-08-21 21:23:59,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:23:59,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471913697] [2020-08-21 21:23:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:23:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:59,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:23:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:23:59,697 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 21:23:59,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471913697] [2020-08-21 21:23:59,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:23:59,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:23:59,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644049336] [2020-08-21 21:23:59,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:23:59,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:23:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:23:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:23:59,727 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-08-21 21:24:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:00,043 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-08-21 21:24:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:24:00,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 21:24:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:00,054 INFO L225 Difference]: With dead ends: 108 [2020-08-21 21:24:00,054 INFO L226 Difference]: Without dead ends: 47 [2020-08-21 21:24:00,059 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 21:24:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-21 21:24:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-21 21:24:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-21 21:24:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-08-21 21:24:00,109 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-08-21 21:24:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:00,109 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-08-21 21:24:00,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:24:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-08-21 21:24:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:24:00,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:00,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:00,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:24:00,112 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-08-21 21:24:00,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:00,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704110683] [2020-08-21 21:24:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:00,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:00,203 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 21:24:00,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704110683] [2020-08-21 21:24:00,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:24:00,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:24:00,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385040478] [2020-08-21 21:24:00,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:24:00,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:24:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:24:00,206 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-08-21 21:24:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:00,358 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-08-21 21:24:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:24:00,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-21 21:24:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:00,362 INFO L225 Difference]: With dead ends: 75 [2020-08-21 21:24:00,362 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 21:24:00,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:24:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 21:24:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-21 21:24:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-21 21:24:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-08-21 21:24:00,374 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-08-21 21:24:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:00,374 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-08-21 21:24:00,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:24:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-08-21 21:24:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 21:24:00,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:00,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:00,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:24:00,376 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-08-21 21:24:00,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:00,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626727495] [2020-08-21 21:24:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:00,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:24:00,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626727495] [2020-08-21 21:24:00,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:24:00,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:24:00,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505748040] [2020-08-21 21:24:00,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:24:00,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:24:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:24:00,436 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-08-21 21:24:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:00,561 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-08-21 21:24:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 21:24:00,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-08-21 21:24:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:00,563 INFO L225 Difference]: With dead ends: 93 [2020-08-21 21:24:00,563 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 21:24:00,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:24:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 21:24:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-21 21:24:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 21:24:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-08-21 21:24:00,572 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-08-21 21:24:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:00,572 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-08-21 21:24:00,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:24:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-08-21 21:24:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 21:24:00,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:00,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:00,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:24:00,574 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-08-21 21:24:00,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:00,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258537366] [2020-08-21 21:24:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:00,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258537366] [2020-08-21 21:24:00,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:24:00,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:24:00,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577341844] [2020-08-21 21:24:00,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:24:00,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:24:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:24:00,706 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-08-21 21:24:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:00,937 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-08-21 21:24:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:24:00,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-21 21:24:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:00,940 INFO L225 Difference]: With dead ends: 82 [2020-08-21 21:24:00,940 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 21:24:00,940 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 21:24:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 21:24:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-08-21 21:24:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 21:24:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-08-21 21:24:00,961 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-08-21 21:24:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:00,962 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-08-21 21:24:00,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:24:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-08-21 21:24:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 21:24:00,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:00,966 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:00,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:24:00,966 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:00,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-08-21 21:24:00,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:00,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857188412] [2020-08-21 21:24:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:01,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:01,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857188412] [2020-08-21 21:24:01,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:24:01,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:24:01,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726960428] [2020-08-21 21:24:01,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:24:01,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:01,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:24:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:24:01,137 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-08-21 21:24:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:01,342 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-21 21:24:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:24:01,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 21:24:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:01,344 INFO L225 Difference]: With dead ends: 84 [2020-08-21 21:24:01,344 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 21:24:01,345 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 21:24:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 21:24:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-08-21 21:24:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 21:24:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-08-21 21:24:01,352 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-08-21 21:24:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:01,353 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-08-21 21:24:01,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:24:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-08-21 21:24:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 21:24:01,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:01,354 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:01,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:24:01,355 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:01,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-08-21 21:24:01,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:01,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138791982] [2020-08-21 21:24:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:01,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:01,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138791982] [2020-08-21 21:24:01,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:24:01,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 21:24:01,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963854863] [2020-08-21 21:24:01,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:24:01,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:01,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:24:01,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:24:01,419 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-08-21 21:24:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:01,618 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-08-21 21:24:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:24:01,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-21 21:24:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:01,620 INFO L225 Difference]: With dead ends: 84 [2020-08-21 21:24:01,620 INFO L226 Difference]: Without dead ends: 73 [2020-08-21 21:24:01,621 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 21:24:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-21 21:24:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-08-21 21:24:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 21:24:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-08-21 21:24:01,633 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-08-21 21:24:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:01,633 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-08-21 21:24:01,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:24:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-08-21 21:24:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 21:24:01,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:01,642 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:01,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:24:01,642 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:01,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-08-21 21:24:01,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:01,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925943456] [2020-08-21 21:24:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:01,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:01,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925943456] [2020-08-21 21:24:01,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:01,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:24:01,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910128324] [2020-08-21 21:24:01,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:24:01,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:01,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:24:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:24:01,812 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-08-21 21:24:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:02,204 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-08-21 21:24:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:24:02,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-21 21:24:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:02,205 INFO L225 Difference]: With dead ends: 86 [2020-08-21 21:24:02,205 INFO L226 Difference]: Without dead ends: 80 [2020-08-21 21:24:02,206 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 21:24:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-21 21:24:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-08-21 21:24:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-21 21:24:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-08-21 21:24:02,223 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-08-21 21:24:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:02,223 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-08-21 21:24:02,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:24:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-08-21 21:24:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 21:24:02,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:02,225 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:02,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:24:02,225 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-08-21 21:24:02,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:02,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884244183] [2020-08-21 21:24:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:02,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:02,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884244183] [2020-08-21 21:24:02,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:02,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:24:02,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889011017] [2020-08-21 21:24:02,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:24:02,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:24:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:24:02,368 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-08-21 21:24:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:02,766 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-08-21 21:24:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:24:02,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-08-21 21:24:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:02,768 INFO L225 Difference]: With dead ends: 95 [2020-08-21 21:24:02,768 INFO L226 Difference]: Without dead ends: 91 [2020-08-21 21:24:02,770 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 21:24:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-21 21:24:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-08-21 21:24:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 21:24:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-08-21 21:24:02,777 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-08-21 21:24:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:02,777 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-08-21 21:24:02,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:24:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-08-21 21:24:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 21:24:02,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:02,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:02,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:24:02,779 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:02,783 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-08-21 21:24:02,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:02,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419111143] [2020-08-21 21:24:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:03,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:03,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419111143] [2020-08-21 21:24:03,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:03,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:24:03,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930913155] [2020-08-21 21:24:03,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:24:03,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:24:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:24:03,045 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-08-21 21:24:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:03,493 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-08-21 21:24:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:24:03,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-21 21:24:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:03,501 INFO L225 Difference]: With dead ends: 99 [2020-08-21 21:24:03,501 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 21:24:03,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:24:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 21:24:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-08-21 21:24:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 21:24:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-08-21 21:24:03,509 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-08-21 21:24:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:03,510 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-08-21 21:24:03,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:24:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-08-21 21:24:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 21:24:03,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:03,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:03,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:24:03,512 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-08-21 21:24:03,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:03,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135164261] [2020-08-21 21:24:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:03,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:03,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135164261] [2020-08-21 21:24:03,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:03,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:24:03,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41111860] [2020-08-21 21:24:03,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:24:03,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:03,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:24:03,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:24:03,731 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-08-21 21:24:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:04,161 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-08-21 21:24:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:24:04,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-21 21:24:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:04,163 INFO L225 Difference]: With dead ends: 101 [2020-08-21 21:24:04,163 INFO L226 Difference]: Without dead ends: 91 [2020-08-21 21:24:04,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:24:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-08-21 21:24:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-08-21 21:24:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 21:24:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-08-21 21:24:04,177 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-08-21 21:24:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:04,178 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-08-21 21:24:04,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:24:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-08-21 21:24:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 21:24:04,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:04,183 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:04,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:24:04,183 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:04,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-08-21 21:24:04,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:04,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899708068] [2020-08-21 21:24:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:04,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:04,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899708068] [2020-08-21 21:24:04,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:04,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:24:04,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720793503] [2020-08-21 21:24:04,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:24:04,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:24:04,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:24:04,388 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-08-21 21:24:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:04,803 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-21 21:24:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:24:04,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-08-21 21:24:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:04,804 INFO L225 Difference]: With dead ends: 94 [2020-08-21 21:24:04,804 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 21:24:04,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-08-21 21:24:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 21:24:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-08-21 21:24:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 21:24:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-08-21 21:24:04,810 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-08-21 21:24:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:04,810 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-08-21 21:24:04,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:24:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-08-21 21:24:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 21:24:04,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:04,811 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:04,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:24:04,812 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-08-21 21:24:04,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:04,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329762059] [2020-08-21 21:24:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:04,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:05,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329762059] [2020-08-21 21:24:05,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:05,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:24:05,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115305639] [2020-08-21 21:24:05,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:24:05,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:05,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:24:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:24:05,008 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 13 states. [2020-08-21 21:24:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:05,631 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-08-21 21:24:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:24:05,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-21 21:24:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:05,633 INFO L225 Difference]: With dead ends: 94 [2020-08-21 21:24:05,633 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 21:24:05,634 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 21:24:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 21:24:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-08-21 21:24:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 21:24:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-08-21 21:24:05,641 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 39 [2020-08-21 21:24:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:05,642 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-08-21 21:24:05,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:24:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-08-21 21:24:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 21:24:05,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:05,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:05,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:24:05,644 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:05,644 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-08-21 21:24:05,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:05,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174395613] [2020-08-21 21:24:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:05,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:05,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174395613] [2020-08-21 21:24:05,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:05,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:24:05,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699615807] [2020-08-21 21:24:05,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:24:05,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:24:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:24:05,840 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 13 states. [2020-08-21 21:24:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:06,509 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2020-08-21 21:24:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 21:24:06,510 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-08-21 21:24:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:06,512 INFO L225 Difference]: With dead ends: 107 [2020-08-21 21:24:06,512 INFO L226 Difference]: Without dead ends: 103 [2020-08-21 21:24:06,513 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 21:24:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-21 21:24:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-08-21 21:24:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 21:24:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-08-21 21:24:06,518 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 39 [2020-08-21 21:24:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:06,518 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-08-21 21:24:06,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:24:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-08-21 21:24:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 21:24:06,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:06,519 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:06,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:24:06,520 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2037263357, now seen corresponding path program 1 times [2020-08-21 21:24:06,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:06,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554183054] [2020-08-21 21:24:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:06,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554183054] [2020-08-21 21:24:06,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:06,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:24:06,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229428180] [2020-08-21 21:24:06,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:24:06,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:24:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:24:06,713 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 13 states. [2020-08-21 21:24:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:07,313 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2020-08-21 21:24:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:24:07,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-21 21:24:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:07,315 INFO L225 Difference]: With dead ends: 109 [2020-08-21 21:24:07,315 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 21:24:07,315 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 21:24:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 21:24:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-08-21 21:24:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 21:24:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-08-21 21:24:07,321 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 41 [2020-08-21 21:24:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:07,321 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-08-21 21:24:07,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:24:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-08-21 21:24:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 21:24:07,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:07,322 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:07,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:24:07,322 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:07,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-08-21 21:24:07,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:07,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302937699] [2020-08-21 21:24:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:07,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:24:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:24:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:24:07,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302937699] [2020-08-21 21:24:07,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:24:07,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:24:07,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970477624] [2020-08-21 21:24:07,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:24:07,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:24:07,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:24:07,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:24:07,678 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 13 states. [2020-08-21 21:24:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:24:08,487 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-08-21 21:24:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:24:08,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-08-21 21:24:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:24:08,488 INFO L225 Difference]: With dead ends: 116 [2020-08-21 21:24:08,489 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 21:24:08,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-21 21:24:08,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 21:24:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-08-21 21:24:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-21 21:24:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-08-21 21:24:08,499 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 41 [2020-08-21 21:24:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:24:08,499 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-08-21 21:24:08,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:24:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-08-21 21:24:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 21:24:08,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:24:08,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:24:08,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:24:08,500 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:24:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:24:08,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-08-21 21:24:08,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:24:08,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591364015] [2020-08-21 21:24:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:24:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:24:08,521 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:24:08,521 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:24:08,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:24:08,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:24:08 BoogieIcfgContainer [2020-08-21 21:24:08,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:24:08,563 INFO L168 Benchmark]: Toolchain (without parser) took 10890.92 ms. Allocated memory was 141.0 MB in the beginning and 317.2 MB in the end (delta: 176.2 MB). Free memory was 103.2 MB in the beginning and 248.9 MB in the end (delta: -145.7 MB). Peak memory consumption was 30.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:24:08,563 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:24:08,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.44 ms. Allocated memory was 141.0 MB in the beginning and 206.6 MB in the end (delta: 65.5 MB). Free memory was 103.0 MB in the beginning and 170.6 MB in the end (delta: -67.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:24:08,568 INFO L168 Benchmark]: Boogie Preprocessor took 73.51 ms. Allocated memory is still 206.6 MB. Free memory was 170.6 MB in the beginning and 167.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:24:08,569 INFO L168 Benchmark]: RCFGBuilder took 867.82 ms. Allocated memory is still 206.6 MB. Free memory was 167.2 MB in the beginning and 110.5 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:24:08,572 INFO L168 Benchmark]: TraceAbstraction took 9275.84 ms. Allocated memory was 206.6 MB in the beginning and 317.2 MB in the end (delta: 110.6 MB). Free memory was 109.9 MB in the beginning and 248.9 MB in the end (delta: -139.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:24:08,577 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 668.44 ms. Allocated memory was 141.0 MB in the beginning and 206.6 MB in the end (delta: 65.5 MB). Free memory was 103.0 MB in the beginning and 170.6 MB in the end (delta: -67.6 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.51 ms. Allocated memory is still 206.6 MB. Free memory was 170.6 MB in the beginning and 167.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 867.82 ms. Allocated memory is still 206.6 MB. Free memory was 167.2 MB in the beginning and 110.5 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9275.84 ms. Allocated memory was 206.6 MB in the beginning and 317.2 MB in the end (delta: 110.6 MB). Free memory was 109.9 MB in the beginning and 248.9 MB in the end (delta: -139.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 855 SDtfs, 581 SDslu, 3411 SDs, 0 SdLazy, 3002 SolverSat, 254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 559 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 106880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 25/71 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...