/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-manipulation/tree-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:37:25,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:37:25,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:37:25,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:37:25,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:37:25,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:37:25,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:37:25,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:37:25,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:37:25,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:37:25,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:37:25,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:37:25,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:37:25,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:37:25,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:37:25,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:37:25,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:37:25,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:37:25,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:37:25,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:37:25,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:37:25,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:37:25,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:37:25,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:37:25,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:37:25,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:37:25,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:37:25,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:37:25,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:37:25,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:37:25,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:37:25,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:37:25,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:37:25,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:37:25,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:37:25,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:37:25,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:37:25,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:37:25,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:37:25,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:37:25,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:37:25,477 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 [2020-10-28 14:37:25,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:37:25,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:37:25,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:37:25,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:37:25,514 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:37:25,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:37:25,515 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:37:25,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:37:25,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:37:25,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:37:25,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:37:25,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:37:25,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:37:25,516 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:37:25,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:37:25,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:37:25,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:37:25,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:37:25,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:37:25,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:37:25,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:37:25,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:37:25,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:37:25,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:37:25,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:37:25,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:37:25,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:37:25,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:37:25,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:37:25,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:37:25,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:37:25,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:37:25,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:37:25,974 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:37:25,975 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:37:25,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/tree-2.i [2020-10-28 14:37:26,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/550c91c38/25439925d6fa4de895ad363b064221ad/FLAGe281482fd [2020-10-28 14:37:26,823 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:37:26,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/tree-2.i [2020-10-28 14:37:26,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/550c91c38/25439925d6fa4de895ad363b064221ad/FLAGe281482fd [2020-10-28 14:37:27,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/550c91c38/25439925d6fa4de895ad363b064221ad [2020-10-28 14:37:27,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:37:27,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:37:27,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:37:27,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:37:27,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:37:27,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124df078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27, skipping insertion in model container [2020-10-28 14:37:27,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:37:27,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:37:27,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:37:27,528 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:37:27,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:37:27,698 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:37:27,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27 WrapperNode [2020-10-28 14:37:27,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:37:27,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:37:27,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:37:27,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:37:27,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (1/1) ... [2020-10-28 14:37:27,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:37:27,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:37:27,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:37:27,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:37:27,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (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 [2020-10-28 14:37:27,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:37:27,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:37:27,881 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:37:27,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:37:27,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:37:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-28 14:37:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2020-10-28 14:37:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure create_tree [2020-10-28 14:37:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tree [2020-10-28 14:37:27,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:37:27,882 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:37:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:37:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:37:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:37:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:37:27,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:37:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:37:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:37:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:37:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:37:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:37:27,884 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:37:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:37:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:37:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:37:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:37:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:37:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:37:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:37:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:37:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:37:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:37:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:37:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:37:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:37:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:37:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:37:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:37:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:37:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:37:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:37:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:37:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:37:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:37:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:37:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:37:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:37:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:37:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:37:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:37:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:37:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:37:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:37:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:37:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:37:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:37:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:37:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:37:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:37:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:37:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:37:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:37:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:37:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:37:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:37:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:37:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:37:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:37:27,892 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:37:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:37:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:37:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:37:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:37:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:37:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:37:27,894 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:37:27,894 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:37:27,894 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:37:27,894 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:37:27,894 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:37:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:37:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:37:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:37:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:37:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:37:27,895 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:37:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:37:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:37:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:37:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:37:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:37:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:37:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:37:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:37:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:37:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:37:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:37:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:37:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:37:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:37:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:37:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:37:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:37:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:37:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:37:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:37:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:37:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:37:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:37:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:37:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:37:27,900 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:37:27,900 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:37:27,900 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:37:27,900 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:37:27,900 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:37:27,900 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:37:27,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:37:27,901 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-28 14:37:27,901 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2020-10-28 14:37:27,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:37:27,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:37:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure create_tree [2020-10-28 14:37:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:37:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:37:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:37:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure free_tree [2020-10-28 14:37:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:37:27,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:37:27,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:37:27,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:37:27,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:37:28,521 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:37:28,521 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-28 14:37:28,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:37:28 BoogieIcfgContainer [2020-10-28 14:37:28,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:37:28,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:37:28,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:37:28,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:37:28,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:37:27" (1/3) ... [2020-10-28 14:37:28,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e859441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:37:28, skipping insertion in model container [2020-10-28 14:37:28,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:27" (2/3) ... [2020-10-28 14:37:28,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e859441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:37:28, skipping insertion in model container [2020-10-28 14:37:28,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:37:28" (3/3) ... [2020-10-28 14:37:28,532 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-2.i [2020-10-28 14:37:28,555 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:37:28,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:37:28,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:37:28,601 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:37:28,602 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:37:28,602 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:37:28,602 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:37:28,602 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:37:28,602 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:37:28,602 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:37:28,602 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:37:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-10-28 14:37:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:37:28,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:28,628 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] [2020-10-28 14:37:28,628 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:28,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash -840089546, now seen corresponding path program 1 times [2020-10-28 14:37:28,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:28,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000519785] [2020-10-28 14:37:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:28,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:28,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:29,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:37:29,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:37:29,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-28 14:37:29,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:29,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:29,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:29,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:37:29,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:29,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:37:29,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:29,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:29,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:29,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:29,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:37:29,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:29,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:29,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:29,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 14:37:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:29,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:29,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:29,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 14:37:29,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:29,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:37:29,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:29,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:29,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-28 14:37:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:37:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:29,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000519785] [2020-10-28 14:37:29,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:29,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:37:29,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510909618] [2020-10-28 14:37:29,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:37:29,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:29,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:37:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:37:29,926 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 4 states. [2020-10-28 14:37:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:30,320 INFO L93 Difference]: Finished difference Result 136 states and 211 transitions. [2020-10-28 14:37:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:37:30,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 14:37:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:30,332 INFO L225 Difference]: With dead ends: 136 [2020-10-28 14:37:30,332 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:37:30,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:37:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:37:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-10-28 14:37:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 14:37:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 14:37:30,384 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 21 [2020-10-28 14:37:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:30,384 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 14:37:30,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:37:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 14:37:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:37:30,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:30,386 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] [2020-10-28 14:37:30,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:37:30,386 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:30,387 INFO L82 PathProgramCache]: Analyzing trace with hash 295384942, now seen corresponding path program 1 times [2020-10-28 14:37:30,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:30,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509724471] [2020-10-28 14:37:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:30,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:30,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:30,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:37:30,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:30,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-28 14:37:30,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:30,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:37:30,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:37:30,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:37:30,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:37:30,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:30,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:30,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:30,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:30,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:30,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:37:30,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:30,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:30,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:30,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:30,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:30,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 14:37:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:30,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:30,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:37:30,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:30,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 14:37:30,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:30,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:30,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:30,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:30,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:37:30,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:30,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509724471] [2020-10-28 14:37:30,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:30,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:37:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43310910] [2020-10-28 14:37:30,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:37:30,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:37:30,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:37:30,850 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-28 14:37:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:31,328 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2020-10-28 14:37:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:37:31,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 14:37:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:31,330 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:37:31,330 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:37:31,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:37:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:37:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 14:37:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:37:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-28 14:37:31,342 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 22 [2020-10-28 14:37:31,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:31,343 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-28 14:37:31,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:37:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-28 14:37:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:37:31,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:31,344 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] [2020-10-28 14:37:31,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:37:31,345 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1926558085, now seen corresponding path program 1 times [2020-10-28 14:37:31,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:31,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854534458] [2020-10-28 14:37:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:31,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:31,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:31,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:31,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:32,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:37:32,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:37:32,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-28 14:37:32,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:32,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:32,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:32,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:37:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:37:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:32,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:32,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:32,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:32,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:32,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:37:32,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:32,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:32,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 14:37:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:32,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 14:37:32,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:37:32,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 14:37:32,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:32,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:32,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:37:32,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-28 14:37:32,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:37:32,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:32,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854534458] [2020-10-28 14:37:32,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:32,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:37:32,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380943189] [2020-10-28 14:37:32,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:37:32,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:32,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:37:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:37:32,622 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 5 states. [2020-10-28 14:37:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:32,834 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-28 14:37:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:37:32,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-28 14:37:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:32,836 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:37:32,836 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:37:32,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:37:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:37:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-28 14:37:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:37:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-28 14:37:32,845 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 28 [2020-10-28 14:37:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:32,846 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-28 14:37:32,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:37:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-28 14:37:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:37:32,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:32,847 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] [2020-10-28 14:37:32,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:37:32,847 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1198531180, now seen corresponding path program 1 times [2020-10-28 14:37:32,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:32,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198270853] [2020-10-28 14:37:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:32,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:32,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:33,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:34,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:34,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:37:34,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:37:34,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1347 [2020-10-28 14:37:34,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:34,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 14:37:34,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:37:34,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:34,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:34,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:34,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:34,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:34,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:34,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:37:34,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:34,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:34,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:34,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:34,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 14:37:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:34,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:34,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:34,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:37:34,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:34,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:37:34,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:34,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:34,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:37:34,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198270853] [2020-10-28 14:37:34,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:34,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:37:34,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123075523] [2020-10-28 14:37:34,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:37:34,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:37:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:37:34,365 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2020-10-28 14:37:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:34,675 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-28 14:37:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:37:34,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-28 14:37:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:34,677 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:37:34,677 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:37:34,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:37:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:37:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 14:37:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:37:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-28 14:37:34,686 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2020-10-28 14:37:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:34,686 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-28 14:37:34,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:37:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-28 14:37:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:37:34,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:34,688 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, 1] [2020-10-28 14:37:34,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:37:34,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1270924478, now seen corresponding path program 1 times [2020-10-28 14:37:34,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:34,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019813441] [2020-10-28 14:37:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:34,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:35,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:35,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:37:35,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-28 14:37:35,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:35,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:37:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:37:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:37:35,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:35,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:35,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:35,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:35,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:35,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:35,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:37:35,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:35,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:35,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:35,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:35,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:35,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 14:37:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:35,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:35,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:35,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:37:35,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:35,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-28 14:37:35,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:35,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:37:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:35,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:37:35,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:35,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019813441] [2020-10-28 14:37:35,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:35,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:37:35,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081822100] [2020-10-28 14:37:35,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:37:35,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:37:35,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:37:35,813 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 14 states. [2020-10-28 14:37:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:36,663 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2020-10-28 14:37:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:37:36,663 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 14:37:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:36,665 INFO L225 Difference]: With dead ends: 84 [2020-10-28 14:37:36,665 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:37:36,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:37:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:37:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-10-28 14:37:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:37:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-28 14:37:36,678 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 36 [2020-10-28 14:37:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:36,678 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-28 14:37:36,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:37:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-28 14:37:36,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:37:36,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:36,680 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, 1] [2020-10-28 14:37:36,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:37:36,680 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1862725360, now seen corresponding path program 1 times [2020-10-28 14:37:36,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:36,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848962003] [2020-10-28 14:37:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:36,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:37,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:37,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:37:37,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:37,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-28 14:37:37,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:37,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:37,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:37:37,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:37:37,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:37:37,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:37,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:37,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:37,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:37,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:37,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:37,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:37:37,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:37,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:37,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:37,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:37,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:37,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:37:37,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 14:37:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:37,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:37,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:37,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:37:37,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:37,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-28 14:37:37,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:37,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:37,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:37:37,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:37,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:37:37,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:37:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:37,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848962003] [2020-10-28 14:37:37,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:37:37,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:37:37,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177000004] [2020-10-28 14:37:37,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:37:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:37,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:37:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:37:37,696 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 14 states. [2020-10-28 14:37:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:38,405 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-28 14:37:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:37:38,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-28 14:37:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:38,406 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:37:38,407 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:37:38,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:37:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:37:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-28 14:37:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:37:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-28 14:37:38,418 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 36 [2020-10-28 14:37:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:38,418 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-28 14:37:38,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:37:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-28 14:37:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:37:38,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:38,420 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, 1, 1, 1, 1] [2020-10-28 14:37:38,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:37:38,420 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1540410782, now seen corresponding path program 1 times [2020-10-28 14:37:38,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:38,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789155535] [2020-10-28 14:37:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:37:38,447 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:37:38,447 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:37:38,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:37:38,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:37:38 BoogieIcfgContainer [2020-10-28 14:37:38,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:37:38,473 INFO L168 Benchmark]: Toolchain (without parser) took 11343.10 ms. Allocated memory was 125.8 MB in the beginning and 278.9 MB in the end (delta: 153.1 MB). Free memory was 100.1 MB in the beginning and 96.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 157.3 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:38,474 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 89.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:37:38,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 563.90 ms. Allocated memory is still 125.8 MB. Free memory was 99.4 MB in the beginning and 77.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:38,475 INFO L168 Benchmark]: Boogie Preprocessor took 87.82 ms. Allocated memory is still 125.8 MB. Free memory was 77.0 MB in the beginning and 74.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:38,476 INFO L168 Benchmark]: RCFGBuilder took 734.12 ms. Allocated memory was 125.8 MB in the beginning and 160.4 MB in the end (delta: 34.6 MB). Free memory was 74.1 MB in the beginning and 94.2 MB in the end (delta: -20.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:38,477 INFO L168 Benchmark]: TraceAbstraction took 9945.91 ms. Allocated memory was 160.4 MB in the beginning and 278.9 MB in the end (delta: 118.5 MB). Free memory was 94.2 MB in the beginning and 96.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 116.2 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:38,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 89.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 563.90 ms. Allocated memory is still 125.8 MB. Free memory was 99.4 MB in the beginning and 77.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.82 ms. Allocated memory is still 125.8 MB. Free memory was 77.0 MB in the beginning and 74.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 734.12 ms. Allocated memory was 125.8 MB in the beginning and 160.4 MB in the end (delta: 34.6 MB). Free memory was 74.1 MB in the beginning and 94.2 MB in the end (delta: -20.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9945.91 ms. Allocated memory was 160.4 MB in the beginning and 278.9 MB in the end (delta: 118.5 MB). Free memory was 94.2 MB in the beginning and 96.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 116.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L630] CALL, EXPR create_tree() [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); [L587] COND TRUE __VERIFIER_nondet_int() [L588] node = malloc(sizeof *node) [L589] COND FALSE !(!node) [L591] node->left = ((void *)0) [L592] node->right = nodelast [L593] COND FALSE !(\read(*nodelast)) [L595] int value = __VERIFIER_nondet_int(); [L596] node->value = value [L597] nodelast = node [L587] COND FALSE !(__VERIFIER_nondet_int()) [L599] COND TRUE node != ((void *)0) [L600] node->left = malloc(sizeof *node) [L601] COND FALSE !(!node) [L603] EXPR node->left [L603] node->left->left = ((void *)0) [L604] EXPR node->left [L604] node->left->right = ((void *)0) [L605] EXPR node->left [L605] node->left->value = 42 [L606] EXPR node->left [L606] node->left->parent = node [L607] EXPR node->right [L607] node = node->right [L599] COND FALSE !(node != ((void *)0)) [L609] return nodelast; [L630] RET, EXPR create_tree() [L630] struct node *data = create_tree(); [L631] COND FALSE !(!data) [L633] CALL inspect(data) [L575] COND FALSE !(!(node)) [L576] COND TRUE node != ((void *)0) [L577] node->left [L577] COND TRUE node->left [L578] EXPR node->left [L578] EXPR node->left->value [L578] COND FALSE !(!(node->left->value == 42)) [L579] EXPR node->value [L579] COND TRUE !(node->value) [L579] CALL fail() [L565] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "tree-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.8s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 224 SDtfs, 449 SDslu, 392 SDs, 0 SdLazy, 1232 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 49 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 213 NumberOfCodeBlocks, 213 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 34759 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 9/11 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...