/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 06:39:28,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:39:28,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:39:28,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:39:28,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:39:28,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:39:28,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:39:28,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:39:28,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:39:28,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:39:28,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:39:28,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:39:28,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:39:28,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:39:28,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:39:28,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:39:28,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:39:28,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:39:28,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:39:28,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:39:28,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:39:28,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:39:28,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:39:28,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:39:28,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:39:28,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:39:28,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:39:28,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:39:28,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:39:28,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:39:28,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:39:28,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:39:28,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:39:28,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:39:28,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:39:28,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:39:28,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:39:28,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:39:28,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:39:28,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:39:28,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:39:28,609 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 06:39:28,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:39:28,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:39:28,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:39:28,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:39:28,664 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:39:28,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:39:28,665 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:39:28,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:39:28,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:39:28,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:39:28,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:39:28,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:39:28,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:39:28,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:39:28,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:39:28,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:39:28,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:39:28,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:39:28,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:39:28,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:39:28,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:39:28,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:39:28,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:39:28,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:39:28,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:39:28,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:39:28,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:39:28,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:39:28,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:39:28,671 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:39:29,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:39:29,132 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:39:29,137 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:39:29,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:39:29,139 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:39:29,141 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 06:39:29,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47675dcb7/3c1c6f603dc844fc8f9fd7cc7350e095/FLAGfca4c646b [2020-09-25 06:39:29,841 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:39:29,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-25 06:39:29,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47675dcb7/3c1c6f603dc844fc8f9fd7cc7350e095/FLAGfca4c646b [2020-09-25 06:39:30,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/47675dcb7/3c1c6f603dc844fc8f9fd7cc7350e095 [2020-09-25 06:39:30,122 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:39:30,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:39:30,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:39:30,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:39:30,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:39:30,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fc1a58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30, skipping insertion in model container [2020-09-25 06:39:30,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:39:30,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:39:30,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:39:30,661 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:39:30,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:39:30,831 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:39:30,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30 WrapperNode [2020-09-25 06:39:30,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:39:30,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:39:30,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:39:30,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:39:30,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (1/1) ... [2020-09-25 06:39:30,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:39:30,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:39:30,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:39:30,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:39:30,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (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 06:39:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:39:31,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:39:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 06:39:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 06:39:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-25 06:39:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-09-25 06:39:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-09-25 06:39:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-09-25 06:39:31,002 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-09-25 06:39:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-09-25 06:39:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-09-25 06:39:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-09-25 06:39:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-09-25 06:39:31,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:39:31,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:39:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 06:39:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 06:39:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 06:39:31,004 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 06:39:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 06:39:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 06:39:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 06:39:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 06:39:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 06:39:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 06:39:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 06:39:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 06:39:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 06:39:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 06:39:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 06:39:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 06:39:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 06:39:31,006 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 06:39:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 06:39:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 06:39:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 06:39:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 06:39:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 06:39:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 06:39:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 06:39:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 06:39:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 06:39:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 06:39:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 06:39:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 06:39:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 06:39:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 06:39:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 06:39:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 06:39:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 06:39:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 06:39:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 06:39:31,009 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 06:39:31,010 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 06:39:31,011 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 06:39:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 06:39:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 06:39:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 06:39:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 06:39:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 06:39:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 06:39:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:39:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 06:39:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 06:39:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 06:39:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 06:39:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 06:39:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 06:39:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 06:39:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 06:39:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 06:39:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 06:39:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 06:39:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 06:39:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 06:39:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 06:39:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 06:39:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 06:39:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 06:39:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 06:39:31,015 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 06:39:31,016 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 06:39:31,016 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 06:39:31,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 06:39:31,016 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 06:39:31,016 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 06:39:31,016 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 06:39:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 06:39:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 06:39:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 06:39:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 06:39:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 06:39:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 06:39:31,017 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 06:39:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 06:39:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 06:39:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 06:39:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 06:39:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 06:39:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 06:39:31,018 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 06:39:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 06:39:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 06:39:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:39:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-25 06:39:31,019 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-09-25 06:39:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 06:39:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 06:39:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-09-25 06:39:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 06:39:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-09-25 06:39:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 06:39:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-25 06:39:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 06:39:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-09-25 06:39:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-09-25 06:39:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-09-25 06:39:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-09-25 06:39:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-09-25 06:39:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:39:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:39:31,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:39:31,821 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:39:31,821 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-25 06:39:31,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:39:31 BoogieIcfgContainer [2020-09-25 06:39:31,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:39:31,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:39:31,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:39:31,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:39:31,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:39:30" (1/3) ... [2020-09-25 06:39:31,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c6f379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:39:31, skipping insertion in model container [2020-09-25 06:39:31,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:39:30" (2/3) ... [2020-09-25 06:39:31,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c6f379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:39:31, skipping insertion in model container [2020-09-25 06:39:31,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:39:31" (3/3) ... [2020-09-25 06:39:31,838 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-09-25 06:39:31,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:39:31,863 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:39:31,901 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:39:31,933 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:39:31,934 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:39:31,934 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:39:31,934 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:39:31,934 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:39:31,934 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:39:31,935 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:39:31,935 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:39:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2020-09-25 06:39:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 06:39:31,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:39:31,989 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 06:39:31,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:39:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:39:31,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times [2020-09-25 06:39:32,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:39:32,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232519567] [2020-09-25 06:39:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:39:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:32,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:32,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 06:39:32,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 06:39:32,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-09-25 06:39:32,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:32,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:32,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:39:32,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:39:32,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:39:32,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:39:32,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:39:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:32,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:32,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:39:32,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:39:32,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 06:39:32,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:32,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:32,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:39:32,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:39:32,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:39:32,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:32,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 06:39:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:32,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:32,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:32,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:39:32,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:39:32,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 06:39:32,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:32,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:39:32,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 06:39:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:39:32,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:32,810 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 06:39:32,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232519567] [2020-09-25 06:39:32,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:39:32,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:39:32,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936650419] [2020-09-25 06:39:32,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:39:32,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:39:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:39:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:39:32,843 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 4 states. [2020-09-25 06:39:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:39:33,325 INFO L93 Difference]: Finished difference Result 423 states and 572 transitions. [2020-09-25 06:39:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:39:33,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-25 06:39:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:39:33,346 INFO L225 Difference]: With dead ends: 423 [2020-09-25 06:39:33,346 INFO L226 Difference]: Without dead ends: 211 [2020-09-25 06:39:33,354 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 06:39:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-25 06:39:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188. [2020-09-25 06:39:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-25 06:39:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions. [2020-09-25 06:39:33,430 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41 [2020-09-25 06:39:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:39:33,431 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 208 transitions. [2020-09-25 06:39:33,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:39:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions. [2020-09-25 06:39:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 06:39:33,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:39:33,436 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 06:39:33,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:39:33,437 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:39:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:39:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times [2020-09-25 06:39:33,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:39:33,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948439056] [2020-09-25 06:39:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:39:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:33,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:34,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:36,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:38,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:39,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:39,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 06:39:39,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 06:39:39,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6013 [2020-09-25 06:39:39,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:39,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-25 06:39:39,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 06:39:39,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-25 06:39:39,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:39,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:39:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:39,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:39:39,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:39:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:39:39,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:39,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:39,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:39:39,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:39:39,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:39:39,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 06:39:39,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 06:39:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:39,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:40,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:42,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:44,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:44,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 06:39:44,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 06:39:44,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-25 06:39:44,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:44,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 06:39:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:39:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 06:39:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:45,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-25 06:39:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:45,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:45,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:45,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:39:45,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:39:45,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-09-25 06:39:45,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:45,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:45,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:39:45,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:39:45,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:39:45,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:45,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 06:39:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:45,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:45,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:45,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 06:39:45,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:39:45,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 06:39:45,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:45,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:39:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:39:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 06:39:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:45,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 06:39:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:46,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:46,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:39:46,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:39:46,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-09-25 06:39:46,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:46,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:46,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 06:39:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:39:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 06:39:46,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:47,918 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-09-25 06:39:48,660 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-09-25 06:39:48,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 06:39:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:48,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:48,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:39:48,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 06:39:48,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:39:48,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-25 06:39:48,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:39:48,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:39:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:39:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:39:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 06:39:48,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:39:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 06:39:49,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948439056] [2020-09-25 06:39:49,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:39:49,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 06:39:49,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843874604] [2020-09-25 06:39:49,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 06:39:49,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:39:49,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 06:39:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 06:39:49,281 INFO L87 Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 34 states. [2020-09-25 06:39:51,117 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-09-25 06:39:51,558 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-09-25 06:39:52,133 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-09-25 06:39:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:39:55,724 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-09-25 06:39:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-25 06:39:55,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 85 [2020-09-25 06:39:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:39:55,731 INFO L225 Difference]: With dead ends: 263 [2020-09-25 06:39:55,734 INFO L226 Difference]: Without dead ends: 260 [2020-09-25 06:39:55,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=293, Invalid=3129, Unknown=0, NotChecked=0, Total=3422 [2020-09-25 06:39:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-25 06:39:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 205. [2020-09-25 06:39:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-25 06:39:55,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2020-09-25 06:39:55,790 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85 [2020-09-25 06:39:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:39:55,791 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2020-09-25 06:39:55,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 06:39:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2020-09-25 06:39:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 06:39:55,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:39:55,795 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 06:39:55,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:39:55,795 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:39:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:39:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times [2020-09-25 06:39:55,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:39:55,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534981054] [2020-09-25 06:39:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:39:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:39:55,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:56,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:57,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:58,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:39:59,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:00,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:00,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-25 06:40:00,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:40:00,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-25 06:40:00,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:00,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:00,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-25 06:40:00,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 06:40:00,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-25 06:40:00,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:40:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:40:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:01,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:01,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:01,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:40:01,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:01,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 06:40:01,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:01,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:40:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:40:01,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 06:40:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:01,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:01,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:05,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:05,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 06:40:05,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:40:05,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4251 [2020-09-25 06:40:05,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:05,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:05,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-25 06:40:05,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:05,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-25 06:40:05,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:40:05,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-25 06:40:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:05,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:05,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:05,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:40:05,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:05,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-25 06:40:05,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:05,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:05,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:40:05,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:05,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 06:40:05,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:05,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 06:40:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:06,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:06,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 06:40:06,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:06,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 06:40:06,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:06,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:06,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:40:06,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:40:06,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 06:40:06,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 06:40:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:06,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:06,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:06,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:40:06,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-09-25 06:40:06,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:06,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 06:40:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:40:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 06:40:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:40:07,807 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-09-25 06:40:07,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-25 06:40:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:40:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:40:08,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:40:08,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 06:40:08,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:40:08,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-09-25 06:40:08,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:40:08,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:40:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 06:40:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:40:08,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 06:40:08,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:40:08,585 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 06:40:08,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534981054] [2020-09-25 06:40:08,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:40:08,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-25 06:40:08,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729167181] [2020-09-25 06:40:08,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-25 06:40:08,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:40:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-25 06:40:08,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 06:40:08,588 INFO L87 Difference]: Start difference. First operand 205 states and 227 transitions. Second operand 33 states. [2020-09-25 06:40:10,183 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-09-25 06:40:10,696 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-09-25 06:40:11,292 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-09-25 06:40:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:40:15,327 INFO L93 Difference]: Finished difference Result 278 states and 317 transitions. [2020-09-25 06:40:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-25 06:40:15,328 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2020-09-25 06:40:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:40:15,331 INFO L225 Difference]: With dead ends: 278 [2020-09-25 06:40:15,332 INFO L226 Difference]: Without dead ends: 275 [2020-09-25 06:40:15,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=307, Invalid=3353, Unknown=0, NotChecked=0, Total=3660 [2020-09-25 06:40:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-25 06:40:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 205. [2020-09-25 06:40:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-25 06:40:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2020-09-25 06:40:15,355 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 87 [2020-09-25 06:40:15,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:40:15,356 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2020-09-25 06:40:15,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-25 06:40:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2020-09-25 06:40:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-25 06:40:15,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:40:15,358 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, 1, 1, 1, 1, 1, 1] [2020-09-25 06:40:15,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:40:15,358 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:40:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:40:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2145368719, now seen corresponding path program 1 times [2020-09-25 06:40:15,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:40:15,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088548509] [2020-09-25 06:40:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:40:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 06:40:15,404 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 06:40:15,404 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 06:40:15,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:40:15,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:40:15 BoogieIcfgContainer [2020-09-25 06:40:15,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:40:15,446 INFO L168 Benchmark]: Toolchain (without parser) took 45322.34 ms. Allocated memory was 139.5 MB in the beginning and 567.3 MB in the end (delta: 427.8 MB). Free memory was 100.2 MB in the beginning and 254.5 MB in the end (delta: -154.3 MB). Peak memory consumption was 273.5 MB. Max. memory is 7.1 GB. [2020-09-25 06:40:15,447 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 06:40:15,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 702.63 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 99.6 MB in the beginning and 168.2 MB in the end (delta: -68.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-09-25 06:40:15,452 INFO L168 Benchmark]: Boogie Preprocessor took 89.45 ms. Allocated memory is still 203.4 MB. Free memory was 168.2 MB in the beginning and 164.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-09-25 06:40:15,459 INFO L168 Benchmark]: RCFGBuilder took 904.72 ms. Allocated memory is still 203.4 MB. Free memory was 164.2 MB in the beginning and 91.8 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 7.1 GB. [2020-09-25 06:40:15,460 INFO L168 Benchmark]: TraceAbstraction took 43614.40 ms. Allocated memory was 203.4 MB in the beginning and 567.3 MB in the end (delta: 363.9 MB). Free memory was 91.1 MB in the beginning and 254.5 MB in the end (delta: -163.4 MB). Peak memory consumption was 200.5 MB. Max. memory is 7.1 GB. [2020-09-25 06:40:15,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 702.63 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 99.6 MB in the beginning and 168.2 MB in the end (delta: -68.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.45 ms. Allocated memory is still 203.4 MB. Free memory was 168.2 MB in the beginning and 164.2 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 904.72 ms. Allocated memory is still 203.4 MB. Free memory was 164.2 MB in the beginning and 91.8 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 43614.40 ms. Allocated memory was 203.4 MB in the beginning and 567.3 MB in the end (delta: 363.9 MB). Free memory was 91.1 MB in the beginning and 254.5 MB in the end (delta: -163.4 MB). Peak memory consumption was 200.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L628] const struct node *p1, *p2; [L629] CALL, EXPR create_sll(&p1, &p2) [L577] struct node *list = ((void *)0); [L579] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L579] RET chain_node(&list) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L581] EXPR \read(*list) [L581] *pp2 = list [L582] COND FALSE !(__VERIFIER_nondet_int()) [L584] EXPR \read(*list) [L584] *pp1 = list [L586] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L586] RET chain_node(&list) [L587] COND FALSE !(__VERIFIER_nondet_int()) [L588] EXPR \read(*list) [L588] return list; [L577] struct node *list = ((void *)0); [L588] return list; [L629] RET, EXPR create_sll(&p1, &p2) [L629] struct node *list = create_sll(&p1, &p2); [L631] EXPR \read(*p1) [L631] EXPR \read(*p2) [L631] CALL check_seq_next(p1, p2) [L615] COND FALSE !(!(beg)) [L616] COND FALSE !(!(end)) [L617] EXPR beg->next [L617] beg = beg->next [L617] COND TRUE end != beg [L618] COND TRUE !(beg) [L618] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 218 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 43.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 13.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 520 SDtfs, 1279 SDslu, 2664 SDs, 0 SdLazy, 6270 SolverSat, 420 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 148 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 29.0s InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 1267370 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 12/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...