/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/forester-heap/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:27:17,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:27:17,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:27:17,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:27:17,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:27:17,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:27:17,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:27:17,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:27:17,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:27:17,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:27:17,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:27:17,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:27:17,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:27:17,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:27:17,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:27:17,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:27:17,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:27:17,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:27:17,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:27:17,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:27:17,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:27:17,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:27:17,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:27:17,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:27:17,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:27:17,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:27:17,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:27:17,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:27:17,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:27:17,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:27:17,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:27:17,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:27:17,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:27:17,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:27:17,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:27:17,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:27:17,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:27:17,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:27:17,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:27:17,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:27:17,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:27:17,586 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 12:27:17,646 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:27:17,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:27:17,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:27:17,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:27:17,651 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:27:17,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:27:17,651 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:27:17,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:27:17,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:27:17,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:27:17,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:27:17,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:27:17,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:27:17,653 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:27:17,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:27:17,655 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:27:17,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:27:17,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:27:17,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:27:17,656 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:27:17,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:27:17,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:27:17,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:27:17,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:27:17,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:27:17,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:27:17,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:27:17,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:27:17,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:27:17,658 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 12:27:18,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:27:18,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:27:18,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:27:18,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:27:18,173 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:27:18,174 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-09-21 12:27:18,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6de66afa2/72a7d3e9b42347e9886fa0c55c39e1c4/FLAG4dc70064d [2020-09-21 12:27:18,873 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:27:18,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-09-21 12:27:18,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6de66afa2/72a7d3e9b42347e9886fa0c55c39e1c4/FLAG4dc70064d [2020-09-21 12:27:19,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6de66afa2/72a7d3e9b42347e9886fa0c55c39e1c4 [2020-09-21 12:27:19,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:27:19,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:27:19,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:19,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:27:19,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:27:19,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27030054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19, skipping insertion in model container [2020-09-21 12:27:19,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:27:19,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:27:19,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:19,653 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:27:19,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:19,777 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:27:19,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19 WrapperNode [2020-09-21 12:27:19,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:19,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:27:19,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:27:19,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:27:19,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (1/1) ... [2020-09-21 12:27:19,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:27:19,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:27:19,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:27:19,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:27:19,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (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 12:27:19,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:27:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:27:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:27:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:27:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:27:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:27:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:27:19,937 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:27:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:27:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:27:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:27:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:27:19,938 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:27:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:27:19,939 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:27:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:27:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:27:19,940 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:27:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:27:19,941 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:27:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:27:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:27:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:27:19,942 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:27:19,943 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:27:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:27:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:27:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:27:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:27:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:27:19,945 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:27:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:27:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:27:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:27:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:27:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:27:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:27:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:27:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:27:19,947 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:27:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:27:19,948 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:27:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:27:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:27:19,950 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:27:19,951 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:27:19,951 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:27:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:27:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:27:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:27:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:27:19,952 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:27:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:27:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:27:19,953 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:27:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:27:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:27:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 12:27:19,954 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:27:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:27:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:27:19,955 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 12:27:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:27:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:27:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 12:27:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:27:19,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:27:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 12:27:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:27:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:27:19,957 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:27:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:27:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:27:19,958 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:27:19,959 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:27:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:27:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:27:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:27:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:27:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:27:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:27:19,960 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:27:19,961 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:27:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:27:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:27:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:27:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:27:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:27:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:27:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:27:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:27:20,509 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:27:20,509 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-09-21 12:27:20,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:20 BoogieIcfgContainer [2020-09-21 12:27:20,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:27:20,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:27:20,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:27:20,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:27:20,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:27:19" (1/3) ... [2020-09-21 12:27:20,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7ccaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:20, skipping insertion in model container [2020-09-21 12:27:20,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:19" (2/3) ... [2020-09-21 12:27:20,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7ccaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:20, skipping insertion in model container [2020-09-21 12:27:20,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:20" (3/3) ... [2020-09-21 12:27:20,527 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2020-09-21 12:27:20,539 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:27:20,549 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-09-21 12:27:20,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-21 12:27:20,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:27:20,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:27:20,603 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:27:20,603 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:27:20,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:27:20,603 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:27:20,603 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:27:20,603 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:27:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-21 12:27:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 12:27:20,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:20,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:20,640 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-09-21 12:27:20,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:20,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547658347] [2020-09-21 12:27:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:20,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:21,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:21,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-21 12:27:21,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:21,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-09-21 12:27:21,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:27:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:21,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-21 12:27:21,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:21,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:21,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:21,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:21,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:21,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:27:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:21,281 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 12:27:21,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547658347] [2020-09-21 12:27:21,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:21,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:27:21,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596378366] [2020-09-21 12:27:21,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:27:21,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:27:21,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:27:21,330 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-09-21 12:27:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:21,454 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2020-09-21 12:27:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:27:21,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 12:27:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:21,469 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:27:21,470 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 12:27:21,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:27:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 12:27:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 12:27:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 12:27:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-09-21 12:27:21,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-09-21 12:27:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:21,522 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-09-21 12:27:21,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:27:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-09-21 12:27:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:27:21,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:21,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:21,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:27:21,524 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:21,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:21,525 INFO L82 PathProgramCache]: Analyzing trace with hash 622671912, now seen corresponding path program 1 times [2020-09-21 12:27:21,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:21,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965234991] [2020-09-21 12:27:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:21,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:21,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:21,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:27:21,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:21,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 12:27:21,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:21,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:27:21,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:21,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:27:21,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:21,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:21,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:21,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:21,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:21,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:21,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:27:21,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:21,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:21,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:21,699 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 12:27:21,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965234991] [2020-09-21 12:27:21,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:21,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:27:21,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912623651] [2020-09-21 12:27:21,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:27:21,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:27:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:27:21,703 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-09-21 12:27:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:21,811 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-21 12:27:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:27:21,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-21 12:27:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:21,813 INFO L225 Difference]: With dead ends: 35 [2020-09-21 12:27:21,813 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 12:27:21,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:27:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 12:27:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-09-21 12:27:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 12:27:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-09-21 12:27:21,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2020-09-21 12:27:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:21,821 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-09-21 12:27:21,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:27:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-09-21 12:27:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:27:21,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:21,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:21,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:27:21,823 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:21,823 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-09-21 12:27:21,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:21,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11745055] [2020-09-21 12:27:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:21,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:21,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 12:27:21,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:21,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-21 12:27:21,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:21,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:21,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:21,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:27:21,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:22,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:22,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:22,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:22,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:22,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:22,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:27:22,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:22,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:22,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:22,031 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 12:27:22,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11745055] [2020-09-21 12:27:22,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:22,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:27:22,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968194512] [2020-09-21 12:27:22,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:27:22,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:27:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:27:22,033 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-09-21 12:27:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:22,174 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-21 12:27:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:27:22,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-21 12:27:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:22,176 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:27:22,176 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 12:27:22,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:27:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 12:27:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-09-21 12:27:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 12:27:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-09-21 12:27:22,185 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-09-21 12:27:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:22,185 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-09-21 12:27:22,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:27:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-09-21 12:27:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 12:27:22,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:22,187 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:22,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:27:22,187 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:22,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-09-21 12:27:22,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:22,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004777262] [2020-09-21 12:27:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:22,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:22,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:22,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:27:22,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:22,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-09-21 12:27:22,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:22,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:27:22,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:22,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:27:22,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:22,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:22,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:22,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:22,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:22,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:22,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:27:22,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:22,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004777262] [2020-09-21 12:27:22,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:22,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:27:22,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351279372] [2020-09-21 12:27:22,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:27:22,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:22,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:27:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:27:22,871 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-09-21 12:27:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:23,234 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-09-21 12:27:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:27:23,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-09-21 12:27:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:23,239 INFO L225 Difference]: With dead ends: 72 [2020-09-21 12:27:23,239 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 12:27:23,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:27:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 12:27:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2020-09-21 12:27:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 12:27:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-09-21 12:27:23,249 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 17 [2020-09-21 12:27:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:23,249 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-09-21 12:27:23,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:27:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-09-21 12:27:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 12:27:23,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:23,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:23,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:27:23,251 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-09-21 12:27:23,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:23,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686857165] [2020-09-21 12:27:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:23,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:27:23,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:23,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-09-21 12:27:23,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:27:23,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-09-21 12:27:23,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:27:23,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:27:23,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:23,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:23,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:23,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:27:23,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:23,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:23,864 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 12:27:23,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686857165] [2020-09-21 12:27:23,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:23,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:27:23,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376227206] [2020-09-21 12:27:23,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:27:23,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:27:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:27:23,873 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2020-09-21 12:27:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:24,061 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-09-21 12:27:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:27:24,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-21 12:27:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:24,063 INFO L225 Difference]: With dead ends: 68 [2020-09-21 12:27:24,064 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 12:27:24,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:27:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 12:27:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-09-21 12:27:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 12:27:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-09-21 12:27:24,084 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 19 [2020-09-21 12:27:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:24,084 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-09-21 12:27:24,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:27:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-09-21 12:27:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 12:27:24,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:24,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:24,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:27:24,088 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:24,088 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-09-21 12:27:24,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:24,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108772037] [2020-09-21 12:27:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:27:24,114 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:27:24,114 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:27:24,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:27:24,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:27:24 BoogieIcfgContainer [2020-09-21 12:27:24,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:27:24,153 INFO L168 Benchmark]: Toolchain (without parser) took 5029.14 ms. Allocated memory was 139.5 MB in the beginning and 248.0 MB in the end (delta: 108.5 MB). Free memory was 100.1 MB in the beginning and 90.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 117.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:24,155 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:27:24,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 649.64 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 99.4 MB in the beginning and 168.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:24,163 INFO L168 Benchmark]: Boogie Preprocessor took 69.82 ms. Allocated memory is still 201.3 MB. Free memory was 168.1 MB in the beginning and 165.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:24,163 INFO L168 Benchmark]: RCFGBuilder took 665.98 ms. Allocated memory is still 201.3 MB. Free memory was 165.5 MB in the beginning and 120.3 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:24,164 INFO L168 Benchmark]: TraceAbstraction took 3632.82 ms. Allocated memory was 201.3 MB in the beginning and 248.0 MB in the end (delta: 46.7 MB). Free memory was 119.6 MB in the beginning and 90.7 MB in the end (delta: 29.0 MB). Peak memory consumption was 75.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:24,177 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 649.64 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 99.4 MB in the beginning and 168.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.82 ms. Allocated memory is still 201.3 MB. Free memory was 168.1 MB in the beginning and 165.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 665.98 ms. Allocated memory is still 201.3 MB. Free memory was 165.5 MB in the beginning and 120.3 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3632.82 ms. Allocated memory was 201.3 MB in the beginning and 248.0 MB in the end (delta: 46.7 MB). Free memory was 119.6 MB in the beginning and 90.7 MB in the end (delta: 29.0 MB). Peak memory consumption was 75.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L995] SLL* list = malloc(sizeof(SLL)); [L996] list->next = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1023] end = ((void*)0) [L1024] end = list [L1027] COND FALSE !(!(((void*)0) != end)) [L1028] EXPR end->colour [L1028] COND FALSE !(!(BLACK == end->colour)) [L1030] COND TRUE ((void*)0) != end [L1032] EXPR end->colour [L1032] COND FALSE !(RED == end->colour) [L1038] EXPR end->next [L1038] COND TRUE !(end->next) [L1038] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 147 SDslu, 234 SDs, 0 SdLazy, 340 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, 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, 5 MinimizatonAttempts, 71 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 5610 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 0/2 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...