/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:25:52,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:52,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:52,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:52,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:52,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:52,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:52,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:52,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:52,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:52,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:52,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:52,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:52,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:52,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:52,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:52,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:52,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:52,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:52,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:52,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:52,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:52,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:52,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:52,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:52,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:52,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:52,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:52,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:52,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:52,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:52,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:52,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:52,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:52,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:52,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:52,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:52,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:52,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:52,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:52,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:52,431 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 [2020-09-21 12:25:52,479 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:52,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:52,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:52,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:52,482 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:52,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:52,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:52,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:52,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:52,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:52,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:52,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:52,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:52,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:52,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:52,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:52,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:52,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:52,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:52,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:52,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:52,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:52,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:52,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:52,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:52,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:52,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:52,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:52,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:52,487 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:52,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:52,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:52,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:52,943 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:52,944 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:52,945 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-21 12:25:53,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b19ba2213/ac5470e3056b495c80b2d5ca8e1a2517/FLAG045fee81b [2020-09-21 12:25:53,642 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:53,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-21 12:25:53,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b19ba2213/ac5470e3056b495c80b2d5ca8e1a2517/FLAG045fee81b [2020-09-21 12:25:53,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b19ba2213/ac5470e3056b495c80b2d5ca8e1a2517 [2020-09-21 12:25:53,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:53,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:53,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:53,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:53,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:53,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:53" (1/1) ... [2020-09-21 12:25:53,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1d4b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:53, skipping insertion in model container [2020-09-21 12:25:53,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:53" (1/1) ... [2020-09-21 12:25:53,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:54,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:54,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:54,556 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:54,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:54,680 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:54,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54 WrapperNode [2020-09-21 12:25:54,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:54,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:54,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:54,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:54,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (1/1) ... [2020-09-21 12:25:54,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (1/1) ... [2020-09-21 12:25:54,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (1/1) ... [2020-09-21 12:25:54,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (1/1) ... [2020-09-21 12:25:54,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (1/1) ... [2020-09-21 12:25:54,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (1/1) ... [2020-09-21 12:25:54,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (1/1) ... [2020-09-21 12:25:54,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:54,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:54,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:54,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:54,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (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 [2020-09-21 12:25:54,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 12:25:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 12:25:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-21 12:25:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-09-21 12:25:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-09-21 12:25:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-09-21 12:25:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-09-21 12:25:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-09-21 12:25:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-09-21 12:25:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-09-21 12:25:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-09-21 12:25:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 12:25:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 12:25:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:25:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:25:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:25:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:25:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:25:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:25:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:25:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:25:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:25:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:25:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:25:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:25:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:25:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:25:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:25:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:25:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:25:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:25:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:25:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:25:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:25:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:25:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:25:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:25:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:25:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:25:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:25:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:25:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:25:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:25:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:25:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:25:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:25:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:25:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:25:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:25:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:25:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:25:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:25:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:25:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:25:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:25:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:25:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:25:54,864 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:25:54,864 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:25:54,864 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:25:54,864 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:25:54,864 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:25:54,864 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:25:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:25:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:25:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:25:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:25:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 12:25:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:25:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:25:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:25:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:25:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:25:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:25:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:25:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:25:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:25:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:25:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:25:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:25:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:25:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:25:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:25:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:25:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:25:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:25:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:25:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:25:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:25:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:25:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:25:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:25:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:25:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:25:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:25:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:25:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:25:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:25:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:25:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:25:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:25:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:25:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:25:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:25:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:25:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:25:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:25:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:25:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:25:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:25:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:25:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:25:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:25:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:54,872 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-21 12:25:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-09-21 12:25:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:25:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:25:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-09-21 12:25:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:25:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-09-21 12:25:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:25:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-21 12:25:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:25:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-09-21 12:25:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-09-21 12:25:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-09-21 12:25:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-09-21 12:25:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-09-21 12:25:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:54,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:55,571 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:55,572 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-21 12:25:55,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:55 BoogieIcfgContainer [2020-09-21 12:25:55,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:55,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:55,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:55,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:55,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:53" (1/3) ... [2020-09-21 12:25:55,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea4db69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:55, skipping insertion in model container [2020-09-21 12:25:55,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:54" (2/3) ... [2020-09-21 12:25:55,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea4db69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:55, skipping insertion in model container [2020-09-21 12:25:55,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:55" (3/3) ... [2020-09-21 12:25:55,588 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-09-21 12:25:55,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:55,610 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:55,633 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:55,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:55,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:55,666 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:55,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:55,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:55,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:55,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:55,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-09-21 12:25:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:55,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:55,712 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] [2020-09-21 12:25:55,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1243342133, now seen corresponding path program 1 times [2020-09-21 12:25:55,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:55,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715948764] [2020-09-21 12:25:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:55,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:55,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:56,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:25:56,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:56,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-09-21 12:25:56,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:25:56,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:56,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-21 12:25:56,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:56,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:56,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:56,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:56,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:25:56,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:56,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:56,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:56,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:56,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:25:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:56,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:56,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-21 12:25:56,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-21 12:25:56,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-21 12:25:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:56,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:56,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715948764] [2020-09-21 12:25:56,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:56,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:25:56,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511854222] [2020-09-21 12:25:56,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:25:56,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:25:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:56,473 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 4 states. [2020-09-21 12:25:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:56,790 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2020-09-21 12:25:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:25:56,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-09-21 12:25:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:56,808 INFO L225 Difference]: With dead ends: 234 [2020-09-21 12:25:56,809 INFO L226 Difference]: Without dead ends: 118 [2020-09-21 12:25:56,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:25:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-21 12:25:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2020-09-21 12:25:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 12:25:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-09-21 12:25:56,884 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 24 [2020-09-21 12:25:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:56,885 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-09-21 12:25:56,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:25:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-09-21 12:25:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 12:25:56,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:56,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1] [2020-09-21 12:25:56,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:56,889 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:56,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2076611886, now seen corresponding path program 1 times [2020-09-21 12:25:56,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:56,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133047687] [2020-09-21 12:25:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 12:25:58,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-09-21 12:25:58,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 12:25:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:25:58,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 12:25:58,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:58,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:58,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:25:58,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:58,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:58,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:58,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:25:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 12:25:59,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1040 [2020-09-21 12:25:59,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 12:25:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:25:59,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:25:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:25:59,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-21 12:25:59,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:25:59,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:25:59,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:59,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:25:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:25:59,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-21 12:25:59,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:25:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:25:59,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:59,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 12:25:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:26:00,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:00,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-09-21 12:26:00,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:26:00,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:00,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:26:00,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:00,718 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-09-21 12:26:00,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:26:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:00,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:00,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:00,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-21 12:26:00,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:00,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:00,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:00,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:26:01,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133047687] [2020-09-21 12:26:01,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:01,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 12:26:01,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420500630] [2020-09-21 12:26:01,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 12:26:01,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:01,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 12:26:01,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-09-21 12:26:01,062 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 24 states. [2020-09-21 12:26:01,648 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-09-21 12:26:01,886 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-09-21 12:26:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:04,052 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2020-09-21 12:26:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 12:26:04,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-09-21 12:26:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:04,057 INFO L225 Difference]: With dead ends: 160 [2020-09-21 12:26:04,057 INFO L226 Difference]: Without dead ends: 157 [2020-09-21 12:26:04,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 12:26:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-21 12:26:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 120. [2020-09-21 12:26:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 12:26:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2020-09-21 12:26:04,096 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 49 [2020-09-21 12:26:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:04,096 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2020-09-21 12:26:04,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 12:26:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2020-09-21 12:26:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 12:26:04,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:04,101 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1] [2020-09-21 12:26:04,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:26:04,101 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1536063324, now seen corresponding path program 1 times [2020-09-21 12:26:04,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:04,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105128992] [2020-09-21 12:26:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:05,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:05,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:26:05,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:05,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1153 [2020-09-21 12:26:05,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 12:26:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 12:26:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:05,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:05,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:05,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:05,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:05,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:05,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:05,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:05,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:05,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:26:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:06,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:06,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 12:26:06,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:06,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-09-21 12:26:06,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:06,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 12:26:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-21 12:26:06,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:07,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:26:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:07,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:26:07,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-09-21 12:26:07,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:26:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:07,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:26:07,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:07,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:26:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:07,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:07,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:07,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 12:26:07,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:26:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:26:07,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:07,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-21 12:26:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:07,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:07,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:26:07,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:07,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-09-21 12:26:07,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:07,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:26:07,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:07,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:26:07,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:08,000 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-09-21 12:26:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:26:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:08,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:08,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:08,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 12:26:08,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:08,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-21 12:26:08,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-21 12:26:08,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:26:08,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 12:26:08,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105128992] [2020-09-21 12:26:08,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:08,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 12:26:08,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110603347] [2020-09-21 12:26:08,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 12:26:08,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:08,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 12:26:08,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-09-21 12:26:08,250 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 24 states. [2020-09-21 12:26:09,185 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-09-21 12:26:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:11,413 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2020-09-21 12:26:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 12:26:11,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-09-21 12:26:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:11,422 INFO L225 Difference]: With dead ends: 161 [2020-09-21 12:26:11,423 INFO L226 Difference]: Without dead ends: 158 [2020-09-21 12:26:11,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 12:26:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-21 12:26:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 120. [2020-09-21 12:26:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 12:26:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2020-09-21 12:26:11,442 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 51 [2020-09-21 12:26:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:11,443 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2020-09-21 12:26:11,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 12:26:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2020-09-21 12:26:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 12:26:11,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:11,445 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:11,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:26:11,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:11,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1614179064, now seen corresponding path program 1 times [2020-09-21 12:26:11,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:11,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575494675] [2020-09-21 12:26:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:26:11,487 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:26:11,487 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:26:11,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:26:11,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:26:11 BoogieIcfgContainer [2020-09-21 12:26:11,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:26:11,518 INFO L168 Benchmark]: Toolchain (without parser) took 17576.99 ms. Allocated memory was 141.6 MB in the beginning and 390.6 MB in the end (delta: 249.0 MB). Free memory was 103.9 MB in the beginning and 283.9 MB in the end (delta: -179.9 MB). Peak memory consumption was 69.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:11,519 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:26:11,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.71 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 169.9 MB in the end (delta: -66.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:11,520 INFO L168 Benchmark]: Boogie Preprocessor took 92.82 ms. Allocated memory is still 205.0 MB. Free memory was 169.9 MB in the beginning and 166.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:11,521 INFO L168 Benchmark]: RCFGBuilder took 803.13 ms. Allocated memory is still 205.0 MB. Free memory was 166.0 MB in the beginning and 102.6 MB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:11,522 INFO L168 Benchmark]: TraceAbstraction took 15936.84 ms. Allocated memory was 205.0 MB in the beginning and 390.6 MB in the end (delta: 185.6 MB). Free memory was 102.0 MB in the beginning and 283.9 MB in the end (delta: -181.9 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:11,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 734.71 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 169.9 MB in the end (delta: -66.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.82 ms. Allocated memory is still 205.0 MB. Free memory was 169.9 MB in the beginning and 166.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 803.13 ms. Allocated memory is still 205.0 MB. Free memory was 166.0 MB in the beginning and 102.6 MB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15936.84 ms. Allocated memory was 205.0 MB in the beginning and 390.6 MB in the end (delta: 185.6 MB). Free memory was 102.0 MB in the beginning and 283.9 MB in the end (delta: -181.9 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L628] const struct node *p1, *p2; [L629] CALL, EXPR create_sll(&p1, &p2) [L577] struct node *list = ((void *)0); [L579] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L579] RET chain_node(&list) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L581] EXPR \read(*list) [L581] *pp2 = list [L582] COND FALSE !(__VERIFIER_nondet_int()) [L584] EXPR \read(*list) [L584] *pp1 = list [L586] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L586] RET chain_node(&list) [L587] COND FALSE !(__VERIFIER_nondet_int()) [L588] EXPR \read(*list) [L588] return list; [L577] struct node *list = ((void *)0); [L588] return list; [L629] RET, EXPR create_sll(&p1, &p2) [L629] struct node *list = create_sll(&p1, &p2); [L631] EXPR \read(*p1) [L631] EXPR \read(*p2) [L631] CALL check_seq_next(p1, p2) [L615] COND FALSE !(!(beg)) [L616] COND FALSE !(!(end)) [L617] EXPR beg->next [L617] beg = beg->next [L617] COND TRUE end != beg [L618] COND TRUE !(beg) [L618] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 313 SDtfs, 568 SDslu, 1406 SDs, 0 SdLazy, 3471 SolverSat, 330 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=2, 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, 3 MinimizatonAttempts, 85 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 228000 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 12/20 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...