/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:12:16,075 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:12:16,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:12:16,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:12:16,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:12:16,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:12:16,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:12:16,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:12:16,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:12:16,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:12:16,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:12:16,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:12:16,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:12:16,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:12:16,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:12:16,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:12:16,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:12:16,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:12:16,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:12:16,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:12:16,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:12:16,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:12:16,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:12:16,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:12:16,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:12:16,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:12:16,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:12:16,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:12:16,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:12:16,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:12:16,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:12:16,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:12:16,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:12:16,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:12:16,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:12:16,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:12:16,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:12:16,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:12:16,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:12:16,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:12:16,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:12:16,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:12:16,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:12:16,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:12:16,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:12:16,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:12:16,239 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:12:16,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:12:16,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:12:16,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:12:16,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:12:16,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:12:16,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:12:16,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:12:16,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:12:16,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:12:16,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:12:16,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:12:16,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:12:16,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:12:16,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:12:16,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:12:16,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:12:16,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:12:16,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:12:16,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:12:16,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:12:16,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:12:16,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:12:16,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:12:16,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:12:16,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:12:16,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:12:16,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:12:16,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:12:16,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:12:16,804 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:12:16,805 INFO L432 ainManager$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 [2020-10-27 01:12:16,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c12e3ee2b/39309eb9fd2d49929e5af32677061b93/FLAG286726389 [2020-10-27 01:12:17,774 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:12:17,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-10-27 01:12:17,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c12e3ee2b/39309eb9fd2d49929e5af32677061b93/FLAG286726389 [2020-10-27 01:12:17,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c12e3ee2b/39309eb9fd2d49929e5af32677061b93 [2020-10-27 01:12:17,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:12:18,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:12:18,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:12:18,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:12:18,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:12:18,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:12:17" (1/1) ... [2020-10-27 01:12:18,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab76294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18, skipping insertion in model container [2020-10-27 01:12:18,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:12:17" (1/1) ... [2020-10-27 01:12:18,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:12:18,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:12:18,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:12:18,388 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:12:18,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:12:18,551 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:12:18,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18 WrapperNode [2020-10-27 01:12:18,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:12:18,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:12:18,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:12:18,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:12:18,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... [2020-10-27 01:12:18,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... [2020-10-27 01:12:18,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... [2020-10-27 01:12:18,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... [2020-10-27 01:12:18,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... [2020-10-27 01:12:18,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... [2020-10-27 01:12:18,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... [2020-10-27 01:12:18,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:12:18,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:12:18,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:12:18,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:12:18,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:12:18,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:12:18,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:12:18,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:12:18,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:12:18,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:12:18,824 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-10-27 01:12:18,824 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-10-27 01:12:18,824 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-10-27 01:12:18,825 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-10-27 01:12:18,825 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-10-27 01:12:18,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-10-27 01:12:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-10-27 01:12:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-10-27 01:12:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-10-27 01:12:18,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:12:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:12:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:12:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:12:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:12:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:12:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:12:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:12:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:12:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:12:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:12:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:12:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:12:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:12:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:12:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:12:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:12:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:12:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:12:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:12:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:12:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:12:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:12:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:12:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:12:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:12:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:12:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:12:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:12:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:12:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:12:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:12:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:12:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:12:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:12:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:12:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:12:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:12:18,842 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:12:18,842 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:12:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:12:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:12:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:12:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:12:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:12:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:12:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:12:18,844 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:12:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:12:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:12:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:12:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:12:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:12:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:12:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:12:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:12:18,846 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:12:18,847 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:12:18,848 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:12:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:12:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:12:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:12:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:12:18,849 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:12:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:12:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:12:18,850 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:12:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:12:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:12:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:12:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:12:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:12:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:12:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:12:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:12:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:12:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:12:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:12:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:12:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:12:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:12:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:12:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:12:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:12:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:12:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:12:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:12:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:12:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:12:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:12:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:12:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:12:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:12:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:12:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:12:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:12:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:12:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:12:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:12:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:12:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:12:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:12:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:12:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:12:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:12:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:12:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-10-27 01:12:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:12:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-10-27 01:12:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 01:12:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:12:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-10-27 01:12:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-10-27 01:12:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-10-27 01:12:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-10-27 01:12:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-10-27 01:12:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:12:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:12:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:12:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:12:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:12:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:12:19,873 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:12:19,873 INFO L298 CfgBuilder]: Removed 33 assume(true) statements. [2020-10-27 01:12:19,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:12:19 BoogieIcfgContainer [2020-10-27 01:12:19,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:12:19,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:12:19,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:12:19,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:12:19,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:12:17" (1/3) ... [2020-10-27 01:12:19,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d9ce59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:12:19, skipping insertion in model container [2020-10-27 01:12:19,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:12:18" (2/3) ... [2020-10-27 01:12:19,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d9ce59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:12:19, skipping insertion in model container [2020-10-27 01:12:19,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:12:19" (3/3) ... [2020-10-27 01:12:19,885 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-10-27 01:12:19,898 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:12:19,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:12:19,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:12:19,945 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:12:19,946 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:12:19,946 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:12:19,946 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:12:19,946 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:12:19,946 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:12:19,947 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:12:19,947 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:12:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2020-10-27 01:12:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:12:19,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:19,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:12:19,978 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:19,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash -14860730, now seen corresponding path program 1 times [2020-10-27 01:12:19,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:19,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329857652] [2020-10-27 01:12:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:20,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:20,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:12:20,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:12:20,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 01:12:20,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:12:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:20,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:12:20,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:20,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:20,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:20,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:20,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:12:20,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:20,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:20,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:20,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:20,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:20,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:12:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:20,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:20,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:20,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 01:12:20,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:12:20,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 01:12:20,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:20,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:20,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 01:12:20,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:20,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:12:20,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329857652] [2020-10-27 01:12:20,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:12:20,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:12:20,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109891289] [2020-10-27 01:12:20,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:12:20,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:12:20,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:12:20,789 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 4 states. [2020-10-27 01:12:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:21,203 INFO L93 Difference]: Finished difference Result 241 states and 393 transitions. [2020-10-27 01:12:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:12:21,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 01:12:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:21,217 INFO L225 Difference]: With dead ends: 241 [2020-10-27 01:12:21,217 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 01:12:21,223 INFO L677 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 [2020-10-27 01:12:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 01:12:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2020-10-27 01:12:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 01:12:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2020-10-27 01:12:21,287 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 26 [2020-10-27 01:12:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:21,288 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2020-10-27 01:12:21,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:12:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2020-10-27 01:12:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:12:21,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:21,291 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] [2020-10-27 01:12:21,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:12:21,291 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash 112471924, now seen corresponding path program 1 times [2020-10-27 01:12:21,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:21,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675740261] [2020-10-27 01:12:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:21,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:22,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:26,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:26,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:12:26,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:12:26,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:12:26,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:12:26,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:26,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:12:26,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:26,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:26,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:26,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:26,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:26,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:26,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:12:26,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:26,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:26,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:26,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:26,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:12:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:26,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:26,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:27,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:27,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:12:27,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1364 [2020-10-27 01:12:27,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:12:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:12:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:28,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:12:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:28,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:28,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:28,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:28,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 01:12:28,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:28,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 01:12:28,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:12:28,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:28,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:12:28,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:28,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:12:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:28,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:28,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:28,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:12:28,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:28,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:12:28,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:28,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:12:28,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:28,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:12:28,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:28,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 01:12:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:28,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:28,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 01:12:28,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:28,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 01:12:28,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:12:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:12:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:12:28,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:31,951 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 202 DAG size of output: 109 [2020-10-27 01:12:32,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:12:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:32,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:32,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:12:32,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:32,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 01:12:32,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:12:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:12:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:12:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:32,967 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2020-10-27 01:12:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:12:33,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675740261] [2020-10-27 01:12:33,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:33,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:12:33,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960194179] [2020-10-27 01:12:33,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:12:33,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:12:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:12:33,034 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand 24 states. [2020-10-27 01:12:34,723 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 01:12:35,748 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 01:12:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:43,531 INFO L93 Difference]: Finished difference Result 164 states and 202 transitions. [2020-10-27 01:12:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:12:43,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-10-27 01:12:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:43,536 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:12:43,536 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:12:43,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:12:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:12:43,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-27 01:12:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:12:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-10-27 01:12:43,567 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 51 [2020-10-27 01:12:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:43,568 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-10-27 01:12:43,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:12:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-10-27 01:12:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:12:43,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:43,570 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] [2020-10-27 01:12:43,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:12:43,570 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash 624163422, now seen corresponding path program 1 times [2020-10-27 01:12:43,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:43,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823658731] [2020-10-27 01:12:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:43,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:45,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:48,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:48,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:12:48,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:12:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 01:12:48,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:12:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:12:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:12:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:48,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:12:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:48,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:48,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:12:48,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:48,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:12:48,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:48,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:12:48,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:48,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:12:48,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:48,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:12:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:48,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:49,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:12:49,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:12:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:50,082 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 01:12:50,268 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-27 01:12:50,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:12:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:50,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:50,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:50,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 01:12:50,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:50,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 01:12:50,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:50,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:12:50,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:50,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:12:50,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-27 01:12:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:12:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:50,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:50,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:50,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:12:50,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 01:12:50,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:12:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:12:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:12:50,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:50,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 01:12:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:50,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:50,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:50,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 01:12:50,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:12:50,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-27 01:12:50,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:50,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:12:50,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:12:50,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:12:50,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:12:51,778 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-27 01:12:51,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 01:12:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:12:51,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:12:51,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:12:51,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:12:51,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:12:51,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 01:12:51,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:12:51,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:12:51,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:12:51,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:12:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:12:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:12:52,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823658731] [2020-10-27 01:12:52,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:12:52,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:12:52,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856864992] [2020-10-27 01:12:52,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:12:52,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:12:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:12:52,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:12:52,143 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 24 states. [2020-10-27 01:12:53,210 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 01:12:53,431 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-27 01:12:53,708 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-27 01:12:54,077 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-27 01:12:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:12:56,434 INFO L93 Difference]: Finished difference Result 161 states and 197 transitions. [2020-10-27 01:12:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:12:56,435 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-27 01:12:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:12:56,439 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:12:56,439 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 01:12:56,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:12:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 01:12:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2020-10-27 01:12:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:12:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-10-27 01:12:56,487 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 53 [2020-10-27 01:12:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:12:56,488 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-10-27 01:12:56,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:12:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-10-27 01:12:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:12:56,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:12:56,494 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, 1, 1] [2020-10-27 01:12:56,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:12:56,495 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:12:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:12:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1329833674, now seen corresponding path program 1 times [2020-10-27 01:12:56,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:12:56,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723246793] [2020-10-27 01:12:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:12:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:12:56,550 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:12:56,551 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:12:56,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:12:56,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:12:56 BoogieIcfgContainer [2020-10-27 01:12:56,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:12:56,591 INFO L168 Benchmark]: Toolchain (without parser) took 38592.15 ms. Allocated memory was 154.1 MB in the beginning and 343.9 MB in the end (delta: 189.8 MB). Free memory was 128.1 MB in the beginning and 291.1 MB in the end (delta: -163.0 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,592 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 75.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:12:56,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 546.12 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 103.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,595 INFO L168 Benchmark]: Boogie Preprocessor took 182.61 ms. Allocated memory is still 154.1 MB. Free memory was 103.1 MB in the beginning and 134.0 MB in the end (delta: -30.8 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,597 INFO L168 Benchmark]: RCFGBuilder took 1138.82 ms. Allocated memory is still 154.1 MB. Free memory was 134.0 MB in the beginning and 72.1 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:12:56,606 INFO L168 Benchmark]: TraceAbstraction took 36711.28 ms. Allocated memory was 154.1 MB in the beginning and 343.9 MB in the end (delta: 189.8 MB). Free memory was 72.1 MB in the beginning and 291.1 MB in the end (delta: -219.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:12:56,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 75.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 546.12 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 103.1 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 182.61 ms. Allocated memory is still 154.1 MB. Free memory was 103.1 MB in the beginning and 134.0 MB in the end (delta: -30.8 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1138.82 ms. Allocated memory is still 154.1 MB. Free memory was 134.0 MB in the beginning and 72.1 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 36711.28 ms. Allocated memory was 154.1 MB in the beginning and 343.9 MB in the end (delta: 189.8 MB). Free memory was 72.1 MB in the beginning and 291.1 MB in the end (delta: -219.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L590] RET chain_node(&list) [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L597] RET chain_node(&list) [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) [L642] CALL check_seq_next(p1, p2) [L626] COND FALSE !(!(beg)) [L627] COND FALSE !(!(end)) [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg [L629] COND TRUE !(beg) [L629] CALL fail() [L565] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll_to_dll_rev-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 15 procedures, 128 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 36.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 15.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 325 SDtfs, 623 SDslu, 1432 SDs, 0 SdLazy, 3664 SolverSat, 367 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 81 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 20.6s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 127 ConstructedInterpolants, 0 QuantifiedInterpolants, 379686 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 9/20 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...