/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=0.2 --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 11:11:00,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:11:00,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:11:00,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:11:00,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:11:00,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:11:00,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:11:00,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:11:00,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:11:00,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:11:00,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:11:00,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:11:00,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:11:00,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:11:00,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:11:00,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:11:00,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:11:00,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:11:00,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:11:00,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:11:00,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:11:00,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:11:00,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:11:00,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:11:00,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:11:00,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:11:00,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:11:00,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:11:00,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:11:00,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:11:00,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:11:01,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:11:01,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:11:01,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:11:01,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:11:01,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:11:01,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:11:01,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:11:01,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:11:01,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:11:01,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:11:01,008 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 11:11:01,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:11:01,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:11:01,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:11:01,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:11:01,037 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:11:01,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:11:01,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:11:01,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:11:01,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:11:01,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:11:01,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:11:01,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:11:01,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:11:01,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:11:01,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:11:01,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:11:01,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:11:01,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:11:01,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:11:01,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:11:01,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:11:01,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:11:01,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:11:01,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:11:01,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:11:01,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:11:01,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:11:01,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:11:01,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:11:01,043 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:11:01,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:11:01,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:11:01,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:11:01,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:11:01,530 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:11:01,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 11:11:01,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/754c3e18c/5463404735c1423aad27ec6fcd9141da/FLAG181bad30b [2020-09-25 11:11:02,303 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:11:02,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 11:11:02,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/754c3e18c/5463404735c1423aad27ec6fcd9141da/FLAG181bad30b [2020-09-25 11:11:02,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/754c3e18c/5463404735c1423aad27ec6fcd9141da [2020-09-25 11:11:02,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:11:02,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:11:02,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:11:02,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:11:02,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:11:02,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:11:02" (1/1) ... [2020-09-25 11:11:02,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418b4979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:02, skipping insertion in model container [2020-09-25 11:11:02,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:11:02" (1/1) ... [2020-09-25 11:11:02,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:11:02,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:11:03,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:11:03,180 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:11:03,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:11:03,316 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:11:03,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03 WrapperNode [2020-09-25 11:11:03,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:11:03,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:11:03,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:11:03,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:11:03,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (1/1) ... [2020-09-25 11:11:03,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:11:03,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:11:03,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:11:03,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:11:03,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (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 11:11:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:11:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:11:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 11:11:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 11:11:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-25 11:11:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-09-25 11:11:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-09-25 11:11:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-09-25 11:11:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-09-25 11:11:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-09-25 11:11:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-09-25 11:11:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-09-25 11:11:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-09-25 11:11:03,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:11:03,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:11:03,496 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 11:11:03,496 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 11:11:03,497 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 11:11:03,497 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 11:11:03,497 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 11:11:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 11:11:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 11:11:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 11:11:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 11:11:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 11:11:03,498 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 11:11:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 11:11:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 11:11:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 11:11:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 11:11:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 11:11:03,499 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 11:11:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 11:11:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 11:11:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 11:11:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 11:11:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 11:11:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 11:11:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 11:11:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 11:11:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 11:11:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 11:11:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 11:11:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 11:11:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 11:11:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 11:11:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 11:11:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 11:11:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 11:11:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 11:11:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 11:11:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 11:11:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 11:11:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 11:11:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 11:11:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 11:11:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 11:11:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 11:11:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 11:11:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 11:11:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 11:11:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 11:11:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 11:11:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 11:11:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 11:11:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 11:11:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 11:11:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 11:11:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 11:11:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 11:11:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 11:11:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 11:11:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 11:11:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 11:11:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 11:11:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:11:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 11:11:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 11:11:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:11:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 11:11:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 11:11:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 11:11:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 11:11:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 11:11:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 11:11:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 11:11:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 11:11:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 11:11:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 11:11:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 11:11:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 11:11:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 11:11:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 11:11:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 11:11:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 11:11:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 11:11:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 11:11:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 11:11:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 11:11:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 11:11:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 11:11:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 11:11:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 11:11:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 11:11:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 11:11:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 11:11:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 11:11:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 11:11:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 11:11:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 11:11:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 11:11:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 11:11:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 11:11:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 11:11:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 11:11:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 11:11:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 11:11:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:11:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-25 11:11:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-09-25 11:11:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 11:11:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 11:11:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-09-25 11:11:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 11:11:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-09-25 11:11:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 11:11:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-25 11:11:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 11:11:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-09-25 11:11:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-09-25 11:11:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-09-25 11:11:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-09-25 11:11:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-09-25 11:11:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:11:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:11:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:11:04,408 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:11:04,408 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-25 11:11:04,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:11:04 BoogieIcfgContainer [2020-09-25 11:11:04,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:11:04,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:11:04,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:11:04,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:11:04,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:11:02" (1/3) ... [2020-09-25 11:11:04,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b99819c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:11:04, skipping insertion in model container [2020-09-25 11:11:04,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:11:03" (2/3) ... [2020-09-25 11:11:04,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b99819c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:11:04, skipping insertion in model container [2020-09-25 11:11:04,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:11:04" (3/3) ... [2020-09-25 11:11:04,425 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-09-25 11:11:04,437 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:11:04,448 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:11:04,471 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:11:04,504 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:11:04,504 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:11:04,504 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:11:04,504 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:11:04,504 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:11:04,505 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:11:04,505 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:11:04,505 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:11:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2020-09-25 11:11:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 11:11:04,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:11:04,545 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 11:11:04,546 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:11:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:11:04,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times [2020-09-25 11:11:04,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:11:04,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706972529] [2020-09-25 11:11:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:11:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:04,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:04,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:04,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:05,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:05,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 11:11:05,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:11:05,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-09-25 11:11:05,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:05,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:05,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:11:05,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 11:11:05,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:11:05,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:11:05,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:11:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:05,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:05,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:05,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:11:05,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:11:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 11:11:05,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:05,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:11:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:11:05,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:11:05,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:11:05,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 11:11:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:05,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:05,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:05,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:05,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:05,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 11:11:05,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:11:05,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-25 11:11:05,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:05,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:05,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:11:05,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 11:11:05,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:11:05,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:11:05,372 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 11:11:05,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706972529] [2020-09-25 11:11:05,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:11:05,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:11:05,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556366834] [2020-09-25 11:11:05,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:11:05,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:11:05,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:11:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:11:05,408 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 4 states. [2020-09-25 11:11:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:11:06,009 INFO L93 Difference]: Finished difference Result 423 states and 572 transitions. [2020-09-25 11:11:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:11:06,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 11:11:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:11:06,035 INFO L225 Difference]: With dead ends: 423 [2020-09-25 11:11:06,036 INFO L226 Difference]: Without dead ends: 211 [2020-09-25 11:11:06,050 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 11:11:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-25 11:11:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188. [2020-09-25 11:11:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-25 11:11:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions. [2020-09-25 11:11:06,201 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41 [2020-09-25 11:11:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:11:06,202 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 208 transitions. [2020-09-25 11:11:06,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:11:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions. [2020-09-25 11:11:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 11:11:06,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:11:06,216 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 11:11:06,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:11:06,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:11:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:11:06,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times [2020-09-25 11:11:06,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:11:06,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115785997] [2020-09-25 11:11:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:11:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:07,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:09,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:11,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:11,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 11:11:11,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:11:11,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 11:11:11,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:11,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-25 11:11:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:11:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-25 11:11:11,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:11:11,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:11:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:11,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:11,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:11,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:11:11,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:11:11,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 11:11:11,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:11,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:11:11,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:11:11,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:11:11,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:11:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 11:11:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:11,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:12,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:16,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:16,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 11:11:16,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:11:16,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 11:11:16,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:16,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:16,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 11:11:16,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:11:16,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-25 11:11:16,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:11:17,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-25 11:11:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:17,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:17,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:17,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 11:11:17,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:11:17,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-09-25 11:11:17,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:17,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:17,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:11:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:11:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 11:11:17,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:11:17,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 11:11:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:17,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:17,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:17,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:17,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 11:11:17,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:11:17,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 11:11:17,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:17,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:17,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:11:17,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:11:17,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 11:11:17,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:11:18,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 11:11:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:18,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:18,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:18,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 11:11:18,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:11:18,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-09-25 11:11:18,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:18,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:18,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 11:11:18,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:11:18,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 11:11:18,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:11:22,061 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-09-25 11:11:22,316 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-09-25 11:11:22,591 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-09-25 11:11:27,822 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 266 DAG size of output: 142 [2020-09-25 11:11:29,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 11:11:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:11:29,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:11:29,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:11:29,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 11:11:29,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:11:29,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-09-25 11:11:29,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:11:29,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:11:29,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:11:29,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:11:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 11:11:29,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:11:29,945 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2020-09-25 11:11:30,039 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 11:11:30,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115785997] [2020-09-25 11:11:30,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:11:30,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 11:11:30,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161338527] [2020-09-25 11:11:30,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 11:11:30,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:11:30,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 11:11:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2020-09-25 11:11:30,045 INFO L87 Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 30 states. [2020-09-25 11:11:31,227 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-09-25 11:11:31,538 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-09-25 11:11:31,754 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-09-25 11:11:32,053 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-09-25 11:11:34,434 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 165 [2020-09-25 11:11:37,123 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 158 [2020-09-25 11:11:39,898 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 11:12:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:00,161 INFO L93 Difference]: Finished difference Result 272 states and 310 transitions. [2020-09-25 11:12:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 11:12:00,164 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-09-25 11:12:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:00,169 INFO L225 Difference]: With dead ends: 272 [2020-09-25 11:12:00,169 INFO L226 Difference]: Without dead ends: 269 [2020-09-25 11:12:00,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 11:12:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-25 11:12:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2020-09-25 11:12:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-25 11:12:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2020-09-25 11:12:00,199 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85 [2020-09-25 11:12:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:00,200 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2020-09-25 11:12:00,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 11:12:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2020-09-25 11:12:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 11:12:00,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:00,202 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 11:12:00,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:12:00,203 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:00,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:00,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times [2020-09-25 11:12:00,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:00,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200643669] [2020-09-25 11:12:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:00,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking...