/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:44:14,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:44:14,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:44:14,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:44:14,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:44:14,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:44:14,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:44:14,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:44:14,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:44:14,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:44:14,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:44:14,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:44:14,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:44:14,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:44:14,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:44:14,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:44:14,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:44:14,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:44:14,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:44:14,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:44:14,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:44:14,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:44:14,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:44:14,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:44:14,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:44:14,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:44:14,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:44:14,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:44:14,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:44:14,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:44:14,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:44:14,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:44:14,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:44:14,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:44:14,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:44:14,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:44:14,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:44:14,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:44:14,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:44:14,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:44:14,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:44:14,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:44:14,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:44:14,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:44:14,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:44:14,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:44:14,468 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:44:14,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:44:14,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:44:14,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:44:14,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:44:14,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:44:14,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:44:14,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:44:14,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:44:14,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:44:14,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:44:14,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:44:14,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:44:14,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:44:14,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:44:14,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:44:14,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:44:14,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:44:14,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:44:14,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:44:14,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:44:14,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:44:14,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:44:14,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:44:14,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:44:14,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:44:14,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:44:14,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:44:14,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:44:14,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:44:14,925 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:44:14,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-10-28 14:44:15,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16d0715d6/1de78e4cde54414ba639bc97b9eb38a6/FLAGbabedc15a [2020-10-28 14:44:15,688 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:44:15,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-10-28 14:44:15,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16d0715d6/1de78e4cde54414ba639bc97b9eb38a6/FLAGbabedc15a [2020-10-28 14:44:15,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16d0715d6/1de78e4cde54414ba639bc97b9eb38a6 [2020-10-28 14:44:16,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:44:16,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:44:16,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:44:16,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:44:16,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:44:16,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205ca86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16, skipping insertion in model container [2020-10-28 14:44:16,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:44:16,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:44:16,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:44:16,428 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:44:16,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:44:16,564 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:44:16,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16 WrapperNode [2020-10-28 14:44:16,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:44:16,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:44:16,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:44:16,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:44:16,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... [2020-10-28 14:44:16,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:44:16,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:44:16,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:44:16,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:44:16,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:44:16,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:44:16,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:44:16,766 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:44:16,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:44:16,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:44:16,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-28 14:44:16,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-28 14:44:16,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-28 14:44:16,767 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:44:16,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:44:16,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:44:16,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:44:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:44:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:44:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:44:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:44:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:44:16,768 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:44:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:44:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:44:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:44:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:44:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:44:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:44:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:44:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:44:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:44:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:44:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:44:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:44:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:44:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:44:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:44:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:44:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:44:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-28 14:44:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-28 14:44:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-28 14:44:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:44:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:44:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:44:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:44:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:44:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:44:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:44:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:44:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:44:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:44:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:44:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:44:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:44:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:44:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:44:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:44:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:44:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:44:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:44:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:44:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:44:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:44:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:44:16,776 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:44:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:44:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:44:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:44:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:44:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:44:16,777 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:44:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:44:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:44:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:44:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:44:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:44:16,778 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:44:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:44:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:44:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:44:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:44:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:44:16,779 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:44:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:44:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:44:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:44:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:44:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:44:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:44:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:44:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:44:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:44:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:44:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:44:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:44:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:44:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:44:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:44:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:44:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:44:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:44:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:44:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:44:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:44:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:44:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:44:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:44:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:44:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:44:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:44:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:44:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:44:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:44:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:44:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:44:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:44:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:44:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:44:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:44:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:44:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:44:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:44:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:44:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:44:16,786 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:44:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:44:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:44:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:44:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:44:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:44:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:44:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:44:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:44:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:44:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:44:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:44:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:44:17,160 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:44:17,309 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:44:17,309 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 14:44:17,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:44:17 BoogieIcfgContainer [2020-10-28 14:44:17,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:44:17,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:44:17,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:44:17,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:44:17,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:44:16" (1/3) ... [2020-10-28 14:44:17,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed3cb09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:44:17, skipping insertion in model container [2020-10-28 14:44:17,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:44:16" (2/3) ... [2020-10-28 14:44:17,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed3cb09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:44:17, skipping insertion in model container [2020-10-28 14:44:17,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:44:17" (3/3) ... [2020-10-28 14:44:17,321 INFO L111 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-10-28 14:44:17,333 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:44:17,339 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:44:17,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:44:17,384 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:44:17,385 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:44:17,385 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:44:17,385 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:44:17,385 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:44:17,385 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:44:17,386 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:44:17,386 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:44:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-28 14:44:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:44:17,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:17,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:17,414 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash 620344659, now seen corresponding path program 1 times [2020-10-28 14:44:17,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:17,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721788028] [2020-10-28 14:44:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:44:18,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:44:18,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-28 14:44:18,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:44:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:44:18,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:18,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:18,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:44:18,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:18,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:18,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:18,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:18,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721788028] [2020-10-28 14:44:18,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:18,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:44:18,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977905830] [2020-10-28 14:44:18,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:44:18,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:18,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:44:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:44:18,364 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-28 14:44:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:18,485 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-28 14:44:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:44:18,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 14:44:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:18,494 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:44:18,495 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:44:18,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:44:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:44:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 14:44:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:44:18,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 14:44:18,540 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2020-10-28 14:44:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:18,541 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 14:44:18,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:44:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 14:44:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:44:18,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:18,543 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] [2020-10-28 14:44:18,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:44:18,543 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1278182859, now seen corresponding path program 1 times [2020-10-28 14:44:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:18,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246695604] [2020-10-28 14:44:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:18,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:44:18,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:18,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 14:44:18,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:44:18,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:18,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:44:18,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:18,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:18,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:18,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:18,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:44:18,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:18,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:18,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:18,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:18,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246695604] [2020-10-28 14:44:18,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:18,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:44:18,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122499158] [2020-10-28 14:44:18,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:44:18,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:18,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:44:18,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:18,733 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-10-28 14:44:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:18,885 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-28 14:44:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:44:18,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 14:44:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:18,889 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:44:18,890 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:44:18,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:44:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:44:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-28 14:44:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:44:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 14:44:18,901 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 22 [2020-10-28 14:44:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:18,902 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 14:44:18,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:44:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 14:44:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:44:18,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:18,903 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:18,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:44:18,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash -511611450, now seen corresponding path program 1 times [2020-10-28 14:44:18,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:18,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756812109] [2020-10-28 14:44:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:18,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:19,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:44:19,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 14:44:19,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:19,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:44:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:44:19,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:19,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:19,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:19,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:19,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:44:19,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:19,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:19,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:44:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:19,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756812109] [2020-10-28 14:44:19,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:19,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:44:19,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933623517] [2020-10-28 14:44:19,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:44:19,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:44:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:19,188 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2020-10-28 14:44:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:19,340 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 14:44:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:44:19,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 14:44:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:19,342 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:44:19,342 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:44:19,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:44:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:44:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2020-10-28 14:44:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:44:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-28 14:44:19,351 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2020-10-28 14:44:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:19,352 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-28 14:44:19,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:44:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-28 14:44:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:44:19,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:19,353 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:19,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:44:19,354 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash 680437702, now seen corresponding path program 1 times [2020-10-28 14:44:19,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:19,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116975469] [2020-10-28 14:44:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:19,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:44:19,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:19,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 14:44:19,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:19,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:19,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:44:19,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:19,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:44:19,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:19,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:19,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:19,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:19,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:19,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:19,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:19,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:19,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:19,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:19,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:19,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116975469] [2020-10-28 14:44:19,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:44:19,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:44:19,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205957945] [2020-10-28 14:44:19,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:44:19,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:44:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:44:19,505 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-10-28 14:44:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:19,628 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 14:44:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:44:19,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 14:44:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:19,630 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:44:19,630 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 14:44:19,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:44:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 14:44:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2020-10-28 14:44:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:44:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 14:44:19,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-28 14:44:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:19,637 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 14:44:19,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:44:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 14:44:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:44:19,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:19,638 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:44:19,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:44:19,639 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash 134346418, now seen corresponding path program 1 times [2020-10-28 14:44:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:19,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574956100] [2020-10-28 14:44:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:19,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:19,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:20,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:44:20,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:20,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-28 14:44:20,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:20,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:20,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:44:20,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:20,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:20,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:20,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:20,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:20,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:20,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:20,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:20,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:20,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:20,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574956100] [2020-10-28 14:44:20,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:20,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:20,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347466083] [2020-10-28 14:44:20,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:20,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:20,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:20,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:20,172 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 10 states. [2020-10-28 14:44:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:20,518 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-28 14:44:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:44:20,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:44:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:20,520 INFO L225 Difference]: With dead ends: 57 [2020-10-28 14:44:20,520 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 14:44:20,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 14:44:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-28 14:44:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 14:44:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-28 14:44:20,527 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2020-10-28 14:44:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:20,528 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-28 14:44:20,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-28 14:44:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:44:20,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:20,529 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:44:20,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:44:20,529 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash 934657394, now seen corresponding path program 1 times [2020-10-28 14:44:20,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:20,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854612184] [2020-10-28 14:44:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:20,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:20,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:44:20,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-28 14:44:20,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:20,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:20,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:20,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:44:20,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:44:20,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:20,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:20,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:20,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:20,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:20,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:20,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:20,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:20,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:20,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:20,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:20,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:20,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:20,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854612184] [2020-10-28 14:44:20,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:20,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:20,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570516139] [2020-10-28 14:44:20,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:20,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:20,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:20,892 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 10 states. [2020-10-28 14:44:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:21,219 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-28 14:44:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:44:21,219 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:44:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:21,220 INFO L225 Difference]: With dead ends: 66 [2020-10-28 14:44:21,220 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 14:44:21,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 14:44:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-28 14:44:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:44:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-28 14:44:21,229 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 26 [2020-10-28 14:44:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:21,229 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-28 14:44:21,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-28 14:44:21,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:44:21,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:21,231 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:44:21,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:44:21,231 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:21,232 INFO L82 PathProgramCache]: Analyzing trace with hash -226803475, now seen corresponding path program 1 times [2020-10-28 14:44:21,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:21,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065056106] [2020-10-28 14:44:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:21,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:21,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:21,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:22,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:22,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:44:22,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:44:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-28 14:44:22,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:22,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:44:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:22,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:22,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:22,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:22,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:22,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:44:22,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:22,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:22,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:22,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065056106] [2020-10-28 14:44:22,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:22,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130080363] [2020-10-28 14:44:22,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:22,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:22,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:22,352 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 10 states. [2020-10-28 14:44:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:22,712 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-28 14:44:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:22,713 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 14:44:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:22,714 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:44:22,714 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 14:44:22,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 14:44:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-28 14:44:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:44:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-28 14:44:22,729 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 28 [2020-10-28 14:44:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:22,729 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-28 14:44:22,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-28 14:44:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:22,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:22,742 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:44:22,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:44:22,744 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash 600500328, now seen corresponding path program 2 times [2020-10-28 14:44:22,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:22,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929435603] [2020-10-28 14:44:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:22,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:22,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:23,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:24,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:44:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1236 [2020-10-28 14:44:24,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:24,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:24,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:44:24,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:24,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:24,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:24,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:24,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:24,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:24,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929435603] [2020-10-28 14:44:24,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:24,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576381117] [2020-10-28 14:44:24,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:24,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:24,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:24,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:24,233 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 10 states. [2020-10-28 14:44:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:24,587 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-28 14:44:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:24,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 14:44:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:24,589 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:44:24,589 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:44:24,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:44:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:44:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-28 14:44:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:44:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 14:44:24,603 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 30 [2020-10-28 14:44:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:24,603 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 14:44:24,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 14:44:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:24,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:24,605 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:44:24,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:44:24,605 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 595516520, now seen corresponding path program 1 times [2020-10-28 14:44:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:24,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067274023] [2020-10-28 14:44:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:24,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 14:44:24,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:24,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:24,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:44:24,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:24,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:44:24,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:24,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:24,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:24,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:24,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067274023] [2020-10-28 14:44:24,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:24,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:44:24,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513984434] [2020-10-28 14:44:24,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:44:24,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:24,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:44:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:44:24,929 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-10-28 14:44:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:25,217 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-28 14:44:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:25,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-28 14:44:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:25,218 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:44:25,218 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:44:25,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:44:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-28 14:44:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 14:44:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 14:44:25,225 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 30 [2020-10-28 14:44:25,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:25,225 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 14:44:25,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:44:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 14:44:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:25,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:25,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:25,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:44:25,227 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1043096551, now seen corresponding path program 2 times [2020-10-28 14:44:25,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:25,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378081530] [2020-10-28 14:44:25,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:25,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:25,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:25,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:25,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:25,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-28 14:44:25,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:25,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:44:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:25,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:44:25,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:25,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:25,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:25,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:25,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:25,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:25,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:25,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:25,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:25,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:25,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:25,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378081530] [2020-10-28 14:44:25,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:25,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:44:25,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48112723] [2020-10-28 14:44:25,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:44:25,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:25,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:44:25,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:44:25,603 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2020-10-28 14:44:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:25,845 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-28 14:44:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:44:25,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 14:44:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:25,847 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:44:25,847 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:44:25,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:44:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:44:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-28 14:44:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:44:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 14:44:25,854 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 30 [2020-10-28 14:44:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:25,854 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 14:44:25,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:44:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 14:44:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:44:25,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:25,855 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:44:25,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:44:25,855 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash -792329511, now seen corresponding path program 1 times [2020-10-28 14:44:25,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:25,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430464898] [2020-10-28 14:44:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:25,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:26,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:26,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:44:26,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:26,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 14:44:26,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:26,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:44:26,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:26,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:44:26,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:26,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:26,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:26,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:26,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:26,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:26,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:26,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:26,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:26,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:26,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430464898] [2020-10-28 14:44:26,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:26,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:44:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344787748] [2020-10-28 14:44:26,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:44:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:44:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:44:26,221 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 11 states. [2020-10-28 14:44:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:26,480 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-28 14:44:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:44:26,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 14:44:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:26,484 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:44:26,484 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 14:44:26,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:44:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 14:44:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 14:44:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:44:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-28 14:44:26,493 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 30 [2020-10-28 14:44:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:26,494 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-28 14:44:26,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:44:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-28 14:44:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:44:26,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:26,498 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-28 14:44:26,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:44:26,499 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:26,500 INFO L82 PathProgramCache]: Analyzing trace with hash -981048684, now seen corresponding path program 2 times [2020-10-28 14:44:26,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:26,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806757860] [2020-10-28 14:44:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:26,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:26,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:44:26,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:26,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-28 14:44:26,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:26,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:26,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:44:26,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:44:26,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:44:26,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:27,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:27,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:27,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:27,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:27,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:27,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:27,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:27,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:27,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:27,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:44:27,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806757860] [2020-10-28 14:44:27,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:27,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:44:27,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031363496] [2020-10-28 14:44:27,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:44:27,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:44:27,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:44:27,072 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 12 states. [2020-10-28 14:44:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:27,800 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-10-28 14:44:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:44:27,802 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 14:44:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:27,803 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:44:27,803 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 14:44:27,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:44:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 14:44:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-28 14:44:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 14:44:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-28 14:44:27,824 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 32 [2020-10-28 14:44:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:27,824 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-28 14:44:27,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:44:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-28 14:44:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:44:27,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:27,829 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:44:27,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:44:27,829 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1704140972, now seen corresponding path program 1 times [2020-10-28 14:44:27,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:27,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92539235] [2020-10-28 14:44:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:44:27,855 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:44:27,855 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:44:27,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:44:27,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:44:27 BoogieIcfgContainer [2020-10-28 14:44:27,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:44:27,891 INFO L168 Benchmark]: Toolchain (without parser) took 11881.08 ms. Allocated memory was 151.0 MB in the beginning and 264.2 MB in the end (delta: 113.2 MB). Free memory was 124.9 MB in the beginning and 163.7 MB in the end (delta: -38.8 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. [2020-10-28 14:44:27,892 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.8 MB in the end (delta: 83.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:44:27,893 INFO L168 Benchmark]: CACSL2BoogieTranslator took 551.44 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 102.5 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:44:27,894 INFO L168 Benchmark]: Boogie Preprocessor took 74.65 ms. Allocated memory is still 151.0 MB. Free memory was 102.5 MB in the beginning and 99.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:44:27,894 INFO L168 Benchmark]: RCFGBuilder took 669.47 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 91.7 MB in the end (delta: 8.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:44:27,901 INFO L168 Benchmark]: TraceAbstraction took 10570.98 ms. Allocated memory was 151.0 MB in the beginning and 264.2 MB in the end (delta: 113.2 MB). Free memory was 91.1 MB in the beginning and 163.7 MB in the end (delta: -72.6 MB). Peak memory consumption was 41.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:44:27,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.8 MB in the end (delta: 83.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 551.44 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 102.5 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.65 ms. Allocated memory is still 151.0 MB. Free memory was 102.5 MB in the beginning and 99.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 669.47 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 91.7 MB in the end (delta: 8.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10570.98 ms. Allocated memory was 151.0 MB in the beginning and 264.2 MB in the end (delta: 113.2 MB). Free memory was 91.1 MB in the beginning and 163.7 MB in the end (delta: -72.6 MB). Peak memory consumption was 41.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND TRUE __VERIFIER_nondet_int() [L537] p->h = 1 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND TRUE __VERIFIER_nondet_int() [L544] p->h = 2 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 2) [L554] EXPR p->h [L554] COND TRUE p->h == 1 [L555] EXPR p->n [L555] p = p->n [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 267 SDtfs, 436 SDslu, 943 SDs, 0 SdLazy, 1790 SolverSat, 199 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=12, 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, 12 MinimizatonAttempts, 115 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 352 NumberOfCodeBlocks, 352 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 308 ConstructedInterpolants, 0 QuantifiedInterpolants, 76584 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 12/50 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...