/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:34:02,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:34:02,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:34:02,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:34:02,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:34:02,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:34:02,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:34:02,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:34:02,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:34:02,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:34:02,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:34:02,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:34:02,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:34:02,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:34:02,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:34:02,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:34:02,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:34:02,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:34:02,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:34:02,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:34:02,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:34:02,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:34:02,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:34:02,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:34:02,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:34:02,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:34:02,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:34:02,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:34:02,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:34:02,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:34:02,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:34:02,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:34:02,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:34:02,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:34:02,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:34:02,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:34:02,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:34:02,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:34:02,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:34:02,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:34:02,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:34:02,945 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 [2020-09-25 14:34:02,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:34:02,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:34:02,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:34:02,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:34:02,998 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:34:02,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:34:02,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:34:02,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:34:02,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:34:02,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:34:03,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:34:03,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:34:03,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:34:03,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:34:03,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:34:03,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:34:03,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:34:03,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:34:03,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:34:03,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:34:03,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:34:03,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:34:03,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:34:03,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:34:03,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:34:03,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:34:03,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:34:03,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:34:03,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:34:03,005 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.rcfgbuilder: Size of a code block -> SingleStatement 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=SMALLESTAMONGWIDE;tolerance=0.5;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:34:03,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:34:03,499 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:34:03,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:34:03,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:34:03,507 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:34:03,508 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 14:34:03,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ef930abe/fbb4c0e14f5449b78d126f735161387c/FLAGf2bd7d2ec [2020-09-25 14:34:04,249 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:34:04,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 14:34:04,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ef930abe/fbb4c0e14f5449b78d126f735161387c/FLAGf2bd7d2ec [2020-09-25 14:34:04,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ef930abe/fbb4c0e14f5449b78d126f735161387c [2020-09-25 14:34:04,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:34:04,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:34:04,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:34:04,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:34:04,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:34:04,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:34:04" (1/1) ... [2020-09-25 14:34:04,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1d4b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:04, skipping insertion in model container [2020-09-25 14:34:04,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:34:04" (1/1) ... [2020-09-25 14:34:04,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:34:04,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:34:05,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:34:05,197 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:34:05,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:34:05,317 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:34:05,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05 WrapperNode [2020-09-25 14:34:05,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:34:05,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:34:05,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:34:05,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:34:05,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (1/1) ... [2020-09-25 14:34:05,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (1/1) ... [2020-09-25 14:34:05,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (1/1) ... [2020-09-25 14:34:05,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (1/1) ... [2020-09-25 14:34:05,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (1/1) ... [2020-09-25 14:34:05,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (1/1) ... [2020-09-25 14:34:05,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (1/1) ... [2020-09-25 14:34:05,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:34:05,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:34:05,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:34:05,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:34:05,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (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 [2020-09-25 14:34:05,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:34:05,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:34:05,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 14:34:05,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 14:34:05,489 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-25 14:34:05,489 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-09-25 14:34:05,489 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-09-25 14:34:05,489 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-09-25 14:34:05,489 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-09-25 14:34:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-09-25 14:34:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-09-25 14:34:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-09-25 14:34:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-09-25 14:34:05,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:34:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:34:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 14:34:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 14:34:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 14:34:05,491 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 14:34:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 14:34:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 14:34:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 14:34:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 14:34:05,492 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 14:34:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 14:34:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 14:34:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 14:34:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 14:34:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 14:34:05,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 14:34:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 14:34:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 14:34:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 14:34:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 14:34:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 14:34:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 14:34:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 14:34:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 14:34:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 14:34:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 14:34:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 14:34:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 14:34:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 14:34:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 14:34:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 14:34:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 14:34:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 14:34:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 14:34:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 14:34:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 14:34:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 14:34:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 14:34:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 14:34:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 14:34:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 14:34:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 14:34:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 14:34:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 14:34:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 14:34:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 14:34:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 14:34:05,499 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 14:34:05,499 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 14:34:05,499 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 14:34:05,499 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 14:34:05,499 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 14:34:05,499 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 14:34:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 14:34:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 14:34:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 14:34:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 14:34:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 14:34:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 14:34:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 14:34:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 14:34:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:34:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 14:34:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 14:34:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:34:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 14:34:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 14:34:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 14:34:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 14:34:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 14:34:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 14:34:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 14:34:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 14:34:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 14:34:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 14:34:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 14:34:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 14:34:05,503 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 14:34:05,504 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 14:34:05,504 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 14:34:05,504 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 14:34:05,504 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 14:34:05,504 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 14:34:05,504 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 14:34:05,504 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 14:34:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 14:34:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 14:34:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 14:34:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 14:34:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 14:34:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 14:34:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 14:34:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 14:34:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 14:34:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 14:34:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 14:34:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 14:34:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 14:34:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 14:34:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 14:34:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 14:34:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 14:34:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 14:34:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:34:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-25 14:34:05,508 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-09-25 14:34:05,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 14:34:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 14:34:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-09-25 14:34:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 14:34:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-09-25 14:34:05,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 14:34:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-25 14:34:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 14:34:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-09-25 14:34:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-09-25 14:34:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-09-25 14:34:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-09-25 14:34:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-09-25 14:34:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:34:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:34:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:34:06,301 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:34:06,301 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-25 14:34:06,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:34:06 BoogieIcfgContainer [2020-09-25 14:34:06,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:34:06,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:34:06,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:34:06,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:34:06,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:34:04" (1/3) ... [2020-09-25 14:34:06,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d968776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:34:06, skipping insertion in model container [2020-09-25 14:34:06,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:34:05" (2/3) ... [2020-09-25 14:34:06,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d968776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:34:06, skipping insertion in model container [2020-09-25 14:34:06,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:34:06" (3/3) ... [2020-09-25 14:34:06,337 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-09-25 14:34:06,349 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:34:06,360 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:34:06,384 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:34:06,418 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:34:06,419 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:34:06,419 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:34:06,419 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:34:06,419 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:34:06,419 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:34:06,419 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:34:06,420 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:34:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2020-09-25 14:34:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 14:34:06,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:34:06,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:34:06,465 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:34:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:34:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times [2020-09-25 14:34:06,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:34:06,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471816863] [2020-09-25 14:34:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:34:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:06,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:06,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:07,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:07,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 14:34:07,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 14:34:07,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-09-25 14:34:07,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:07,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:07,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:34:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 14:34:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:34:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:34:07,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:34:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:07,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:07,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:07,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:34:07,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:34:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:34:07,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:07,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:07,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:34:07,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:34:07,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:34:07,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:34:07,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 14:34:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:07,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:07,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:07,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:07,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 14:34:07,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:34:07,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-25 14:34:07,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:07,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:07,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:34:07,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:34:07,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:34:07,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:34:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:34:07,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471816863] [2020-09-25 14:34:07,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:34:07,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:34:07,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510079598] [2020-09-25 14:34:07,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:34:07,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:34:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:34:07,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:34:07,349 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 4 states. [2020-09-25 14:34:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:34:07,878 INFO L93 Difference]: Finished difference Result 423 states and 572 transitions. [2020-09-25 14:34:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:34:07,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 14:34:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:34:07,900 INFO L225 Difference]: With dead ends: 423 [2020-09-25 14:34:07,900 INFO L226 Difference]: Without dead ends: 211 [2020-09-25 14:34:07,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:34:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-25 14:34:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188. [2020-09-25 14:34:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-25 14:34:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions. [2020-09-25 14:34:07,999 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41 [2020-09-25 14:34:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:34:07,999 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 208 transitions. [2020-09-25 14:34:08,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:34:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions. [2020-09-25 14:34:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 14:34:08,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:34:08,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:34:08,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:34:08,009 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:34:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:34:08,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times [2020-09-25 14:34:08,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:34:08,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005543528] [2020-09-25 14:34:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:34:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:09,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:11,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:14,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:14,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 14:34:14,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 14:34:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5853 [2020-09-25 14:34:14,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:14,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-25 14:34:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:34:14,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-25 14:34:14,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:34:14,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:34:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:14,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:14,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:14,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:34:14,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:34:14,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:34:14,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:14,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:34:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:34:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:34:14,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:34:14,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 14:34:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:14,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:15,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:19,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:19,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 14:34:19,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:34:19,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 14:34:19,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:19,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 14:34:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:34:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-25 14:34:19,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:34:19,876 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-09-25 14:34:20,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-25 14:34:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:20,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:20,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:20,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:20,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 14:34:20,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:34:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-09-25 14:34:20,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:20,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 14:34:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:34:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 14:34:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:34:20,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 14:34:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:20,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:20,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:20,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:20,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 14:34:20,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:34:20,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-25 14:34:20,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:20,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:34:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:34:20,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 14:34:20,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:34:21,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 14:34:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:21,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:21,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:21,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 14:34:21,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:34:21,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-09-25 14:34:21,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:21,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:21,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 14:34:21,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 14:34:21,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 14:34:21,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:34:24,730 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-09-25 14:34:28,563 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 154 DAG size of output: 143 [2020-09-25 14:34:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 14:34:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:34:28,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:34:28,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:34:28,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 14:34:28,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:34:28,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-25 14:34:28,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:34:28,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:34:28,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 14:34:28,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 14:34:28,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 14:34:28,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:34:29,627 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-09-25 14:34:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 14:34:29,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005543528] [2020-09-25 14:34:29,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:34:29,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 14:34:29,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614557594] [2020-09-25 14:34:29,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 14:34:29,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:34:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 14:34:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-09-25 14:34:29,775 INFO L87 Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 30 states. [2020-09-25 14:34:31,217 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-09-25 14:34:31,601 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-09-25 14:34:31,880 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-09-25 14:34:32,473 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-09-25 14:34:35,145 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 173 [2020-09-25 14:34:37,237 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 162 [2020-09-25 14:34:39,612 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 174 [2020-09-25 14:35:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:35:02,892 INFO L93 Difference]: Finished difference Result 272 states and 310 transitions. [2020-09-25 14:35:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 14:35:02,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-09-25 14:35:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:35:02,904 INFO L225 Difference]: With dead ends: 272 [2020-09-25 14:35:02,904 INFO L226 Difference]: Without dead ends: 269 [2020-09-25 14:35:02,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 14:35:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-25 14:35:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2020-09-25 14:35:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-25 14:35:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2020-09-25 14:35:02,972 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85 [2020-09-25 14:35:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:35:02,973 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2020-09-25 14:35:02,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 14:35:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2020-09-25 14:35:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 14:35:02,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:35:02,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:35:02,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:35:02,978 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:35:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:35:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times [2020-09-25 14:35:02,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:35:02,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921133003] [2020-09-25 14:35:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:35:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:35:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking...