/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:10,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:10,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:10,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:10,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:10,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:10,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:10,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:10,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:10,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:10,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:10,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:10,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:10,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:10,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:10,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:10,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:10,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:10,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:10,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:10,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:10,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:10,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:10,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:10,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:10,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:10,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:10,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:10,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:10,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:10,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:10,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:10,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:10,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:10,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:10,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:10,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:10,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:10,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:10,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:10,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:10,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:23:10,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:10,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:10,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:10,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:10,992 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:10,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:10,993 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:10,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:10,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:10,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:10,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:10,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:10,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:10,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:10,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:10,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:10,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:10,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:10,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:10,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:10,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:10,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:10,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:10,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:10,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:10,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:10,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:10,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:10,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:10,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:11,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:11,566 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:11,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:11,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:11,577 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:11,579 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-09-21 11:23:11,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abf348dbc/c0a9821098de4d7d979bffd8350be910/FLAG491ae0ffe [2020-09-21 11:23:12,348 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:12,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-09-21 11:23:12,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abf348dbc/c0a9821098de4d7d979bffd8350be910/FLAG491ae0ffe [2020-09-21 11:23:12,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abf348dbc/c0a9821098de4d7d979bffd8350be910 [2020-09-21 11:23:12,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:12,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:12,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:12,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:12,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:12,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d19aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12, skipping insertion in model container [2020-09-21 11:23:12,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:12,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:13,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:13,283 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:13,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:13,395 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:13,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13 WrapperNode [2020-09-21 11:23:13,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:13,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:13,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:13,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:13,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:13,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:13,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:13,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:13,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:13,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:13,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 11:23:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 11:23:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-21 11:23:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-21 11:23:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-21 11:23:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 11:23:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:23:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 11:23:13,555 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 11:23:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 11:23:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 11:23:13,556 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 11:23:13,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 11:23:13,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 11:23:13,557 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 11:23:13,558 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 11:23:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 11:23:13,559 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 11:23:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 11:23:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 11:23:13,560 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 11:23:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 11:23:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 11:23:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 11:23:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 11:23:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-21 11:23:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-21 11:23:13,563 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-21 11:23:13,564 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 11:23:13,564 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 11:23:13,564 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 11:23:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 11:23:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 11:23:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 11:23:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 11:23:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 11:23:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 11:23:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 11:23:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 11:23:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 11:23:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 11:23:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 11:23:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 11:23:13,566 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 11:23:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 11:23:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 11:23:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 11:23:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 11:23:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 11:23:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 11:23:13,567 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 11:23:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 11:23:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 11:23:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 11:23:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 11:23:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:23:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:23:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 11:23:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:23:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 11:23:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 11:23:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 11:23:13,570 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 11:23:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:23:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 11:23:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 11:23:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 11:23:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 11:23:13,571 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 11:23:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 11:23:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 11:23:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 11:23:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 11:23:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 11:23:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 11:23:13,572 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 11:23:13,573 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 11:23:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 11:23:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 11:23:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 11:23:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 11:23:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 11:23:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 11:23:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 11:23:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:23:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:23:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:23:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:23:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:23:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:13,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:13,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:13,935 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 11:23:14,256 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:14,259 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 11:23:14,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:14 BoogieIcfgContainer [2020-09-21 11:23:14,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:14,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:14,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:14,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:14,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:12" (1/3) ... [2020-09-21 11:23:14,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359b1505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:14, skipping insertion in model container [2020-09-21 11:23:14,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (2/3) ... [2020-09-21 11:23:14,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359b1505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:14, skipping insertion in model container [2020-09-21 11:23:14,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:14" (3/3) ... [2020-09-21 11:23:14,275 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-09-21 11:23:14,286 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:14,297 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:14,321 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:14,350 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:14,350 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:14,350 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:14,350 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:14,350 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:14,351 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:14,351 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:14,351 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-21 11:23:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:23:14,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:14,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:14,382 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-09-21 11:23:14,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:14,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999669661] [2020-09-21 11:23:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,545 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,546 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,546 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,547 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:23:14,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:23:14,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:23:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:14,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,638 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,639 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,639 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,640 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:14,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:14,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:14,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:14,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999669661] [2020-09-21 11:23:14,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:14,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:14,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763414128] [2020-09-21 11:23:14,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:14,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:14,703 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-21 11:23:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:14,843 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-09-21 11:23:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:14,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 11:23:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:14,874 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:23:14,875 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:23:14,879 INFO L675 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 [2020-09-21 11:23:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:23:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 11:23:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 11:23:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-09-21 11:23:14,930 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-09-21 11:23:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:14,931 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-09-21 11:23:14,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-09-21 11:23:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:23:14,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:14,932 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] [2020-09-21 11:23:14,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:14,933 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-09-21 11:23:14,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:14,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89905203] [2020-09-21 11:23:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,987 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,987 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,987 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,988 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:23:14,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:23:14,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:14,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:23:14,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,091 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,092 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,092 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,092 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:15,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:15,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89905203] [2020-09-21 11:23:15,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:15,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:15,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148720566] [2020-09-21 11:23:15,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:15,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:15,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:15,107 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-09-21 11:23:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,262 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-21 11:23:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:23:15,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-21 11:23:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,267 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:23:15,267 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:23:15,268 INFO L675 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 [2020-09-21 11:23:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:23:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-09-21 11:23:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:23:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-09-21 11:23:15,279 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-09-21 11:23:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,280 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-09-21 11:23:15,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-09-21 11:23:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:23:15,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,281 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] [2020-09-21 11:23:15,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:15,282 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-09-21 11:23:15,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396132240] [2020-09-21 11:23:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,343 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,347 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,348 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:15,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-21 11:23:15,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:15,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:15,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,458 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,458 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,459 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,459 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:15,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:15,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:15,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396132240] [2020-09-21 11:23:15,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:15,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:15,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292206758] [2020-09-21 11:23:15,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:15,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:15,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:15,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:15,470 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-09-21 11:23:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,608 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-09-21 11:23:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:23:15,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 11:23:15,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,611 INFO L225 Difference]: With dead ends: 52 [2020-09-21 11:23:15,611 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:23:15,612 INFO L675 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 [2020-09-21 11:23:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:23:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-09-21 11:23:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 11:23:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-09-21 11:23:15,629 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-09-21 11:23:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,629 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-09-21 11:23:15,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:15,630 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-09-21 11:23:15,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:23:15,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,631 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] [2020-09-21 11:23:15,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:15,631 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-09-21 11:23:15,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022428870] [2020-09-21 11:23:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,703 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,709 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,709 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,709 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:15,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 11:23:15,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:15,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:23:15,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,782 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,782 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,783 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,783 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:15,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:15,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:15,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022428870] [2020-09-21 11:23:15,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:15,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:15,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445746872] [2020-09-21 11:23:15,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:15,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:15,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:15,793 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-09-21 11:23:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,915 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-09-21 11:23:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:23:15,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 11:23:15,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,916 INFO L225 Difference]: With dead ends: 52 [2020-09-21 11:23:15,917 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 11:23:15,917 INFO L675 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 [2020-09-21 11:23:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 11:23:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-09-21 11:23:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:23:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-21 11:23:15,924 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-09-21 11:23:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,924 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-21 11:23:15,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-21 11:23:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:15,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,926 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] [2020-09-21 11:23:15,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:15,926 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-09-21 11:23:15,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038341398] [2020-09-21 11:23:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,027 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,027 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,027 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,030 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:23:16,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-21 11:23:16,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:16,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:16,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:23:16,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,211 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,211 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,211 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,212 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:16,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:16,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:16,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:16,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038341398] [2020-09-21 11:23:16,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:16,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:23:16,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748353263] [2020-09-21 11:23:16,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:23:16,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:23:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:23:16,227 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-09-21 11:23:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:16,485 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 11:23:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:23:16,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-21 11:23:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:16,487 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:23:16,487 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:23:16,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:23:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:23:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-09-21 11:23:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:23:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-09-21 11:23:16,496 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-09-21 11:23:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:16,497 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-09-21 11:23:16,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:23:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-09-21 11:23:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:16,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:16,498 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] [2020-09-21 11:23:16,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:23:16,498 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:16,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-09-21 11:23:16,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:16,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148533208] [2020-09-21 11:23:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,578 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,578 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,578 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:23:16,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 11:23:16,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:23:16,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:16,703 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:16,703 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:16,703 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:16,703 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:16,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:16,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:16,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:16,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:16,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:16,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:16,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:16,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:16,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148533208] [2020-09-21 11:23:16,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:16,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:23:16,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333869766] [2020-09-21 11:23:16,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:23:16,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:23:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:23:16,712 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-09-21 11:23:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:16,979 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-09-21 11:23:16,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:23:16,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-21 11:23:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:16,982 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:23:16,982 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 11:23:16,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:23:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 11:23:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-09-21 11:23:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 11:23:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-09-21 11:23:16,990 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-09-21 11:23:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:16,991 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-09-21 11:23:16,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:23:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-09-21 11:23:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:23:16,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:16,992 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] [2020-09-21 11:23:16,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:23:16,992 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-09-21 11:23:16,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:16,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436931340] [2020-09-21 11:23:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,109 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,109 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,109 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:17,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:23:17,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,331 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,332 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,332 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,332 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:17,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:17,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:17,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:17,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:17,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:17,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436931340] [2020-09-21 11:23:17,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:17,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:23:17,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960262521] [2020-09-21 11:23:17,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:23:17,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:23:17,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:17,341 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-09-21 11:23:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:17,656 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-09-21 11:23:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:23:17,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-21 11:23:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:17,658 INFO L225 Difference]: With dead ends: 67 [2020-09-21 11:23:17,658 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 11:23:17,659 INFO L675 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 [2020-09-21 11:23:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 11:23:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-21 11:23:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 11:23:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-09-21 11:23:17,672 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-09-21 11:23:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:17,673 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-09-21 11:23:17,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:23:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-09-21 11:23:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:23:17,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:17,677 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] [2020-09-21 11:23:17,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:23:17,677 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-09-21 11:23:17,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:17,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126041251] [2020-09-21 11:23:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:17,796 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:17,797 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:17,797 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:17,797 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:17,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:23:17,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:17,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 11:23:17,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:17,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:17,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:17,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:23:17,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:18,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,005 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,005 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,005 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,006 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:18,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:18,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:18,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:18,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:18,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126041251] [2020-09-21 11:23:18,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:18,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:23:18,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632552145] [2020-09-21 11:23:18,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:23:18,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:18,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:23:18,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:18,015 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 10 states. [2020-09-21 11:23:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:18,327 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-09-21 11:23:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:23:18,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-21 11:23:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:18,330 INFO L225 Difference]: With dead ends: 69 [2020-09-21 11:23:18,330 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 11:23:18,331 INFO L675 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 [2020-09-21 11:23:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 11:23:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-09-21 11:23:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:23:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-09-21 11:23:18,346 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-09-21 11:23:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:18,347 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-09-21 11:23:18,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:23:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-09-21 11:23:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:23:18,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:18,350 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] [2020-09-21 11:23:18,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:23:18,351 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-09-21 11:23:18,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:18,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714598825] [2020-09-21 11:23:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,466 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,466 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,466 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,466 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:23:18,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-21 11:23:18,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:18,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:18,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:23:18,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:18,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:18,665 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:18,665 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:18,666 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:18,666 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:18,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:18,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:18,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:18,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:18,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:18,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714598825] [2020-09-21 11:23:18,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:18,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:23:18,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313570070] [2020-09-21 11:23:18,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:23:18,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:18,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:23:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:18,676 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-09-21 11:23:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:18,971 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-09-21 11:23:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:23:18,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-21 11:23:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:18,972 INFO L225 Difference]: With dead ends: 62 [2020-09-21 11:23:18,973 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:23:18,973 INFO L675 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 [2020-09-21 11:23:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:23:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-09-21 11:23:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:23:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-09-21 11:23:18,984 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-09-21 11:23:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:18,985 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-09-21 11:23:18,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:23:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-09-21 11:23:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:23:18,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:18,988 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] [2020-09-21 11:23:18,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:23:18,989 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:18,990 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-09-21 11:23:18,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:18,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157758637] [2020-09-21 11:23:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:19,139 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:23:19,140 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:19,141 FATAL L256 erpolLogProxyWrapper]: Difference in width: 4 [2020-09-21 11:23:19,141 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:19,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:23:19,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-21 11:23:19,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:23:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:23:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:19,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:19,297 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:19,297 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:19,297 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:19,297 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:19,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:19,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:19,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:19,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:19,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157758637] [2020-09-21 11:23:19,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:19,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:23:19,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942262996] [2020-09-21 11:23:19,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:23:19,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:19,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:23:19,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:23:19,311 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 11 states. [2020-09-21 11:23:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:19,586 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-09-21 11:23:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:23:19,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-21 11:23:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:19,588 INFO L225 Difference]: With dead ends: 60 [2020-09-21 11:23:19,588 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 11:23:19,589 INFO L675 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 [2020-09-21 11:23:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 11:23:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-21 11:23:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:23:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-09-21 11:23:19,599 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 28 [2020-09-21 11:23:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:19,601 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-09-21 11:23:19,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:23:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-09-21 11:23:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:23:19,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:19,606 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] [2020-09-21 11:23:19,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:23:19,607 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-09-21 11:23:19,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:19,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203086344] [2020-09-21 11:23:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:19,760 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:23:19,760 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:19,761 FATAL L256 erpolLogProxyWrapper]: Difference in width: 2 [2020-09-21 11:23:19,761 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:19,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:23:19,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-21 11:23:19,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:23:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:23:19,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:20,036 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:20,036 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:20,036 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:20,036 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:20,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:20,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:20,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:20,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:20,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:20,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:20,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203086344] [2020-09-21 11:23:20,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:20,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:23:20,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406618672] [2020-09-21 11:23:20,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:23:20,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:20,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:23:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:23:20,053 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 11 states. [2020-09-21 11:23:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:20,379 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 11:23:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:23:20,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-21 11:23:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:20,382 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:23:20,382 INFO L226 Difference]: Without dead ends: 50 [2020-09-21 11:23:20,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:23:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-21 11:23:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-21 11:23:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 11:23:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-09-21 11:23:20,397 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-09-21 11:23:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:20,397 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-09-21 11:23:20,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:23:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-09-21 11:23:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:23:20,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:20,399 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] [2020-09-21 11:23:20,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:23:20,400 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:20,400 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-09-21 11:23:20,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:20,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102662194] [2020-09-21 11:23:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:20,542 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:20,542 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:20,542 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:20,543 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:20,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:23:20,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:20,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-21 11:23:20,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:23:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:20,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:23:20,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:20,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:20,762 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:20,762 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:20,762 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:20,763 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:20,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:20,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:20,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:20,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:20,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:20,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:20,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:20,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:20,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102662194] [2020-09-21 11:23:20,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:20,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:23:20,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708831934] [2020-09-21 11:23:20,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:23:20,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:20,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:23:20,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:23:20,776 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2020-09-21 11:23:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:21,203 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-09-21 11:23:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:23:21,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-21 11:23:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:21,205 INFO L225 Difference]: With dead ends: 86 [2020-09-21 11:23:21,205 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 11:23:21,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:23:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 11:23:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-09-21 11:23:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 11:23:21,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-09-21 11:23:21,213 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 30 [2020-09-21 11:23:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:21,213 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-09-21 11:23:21,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:23:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-09-21 11:23:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:23:21,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:21,214 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] [2020-09-21 11:23:21,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:23:21,215 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:21,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-09-21 11:23:21,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:21,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056399596] [2020-09-21 11:23:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:23:21,240 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:23:21,240 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:23:21,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:23:21,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:21 BoogieIcfgContainer [2020-09-21 11:23:21,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:21,271 INFO L168 Benchmark]: Toolchain (without parser) took 8680.13 ms. Allocated memory was 147.8 MB in the beginning and 308.8 MB in the end (delta: 161.0 MB). Free memory was 101.6 MB in the beginning and 257.2 MB in the end (delta: -155.7 MB). Peak memory consumption was 5.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:21,272 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:23:21,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 791.43 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 100.9 MB in the beginning and 170.7 MB in the end (delta: -69.8 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:21,274 INFO L168 Benchmark]: Boogie Preprocessor took 75.11 ms. Allocated memory is still 203.9 MB. Free memory was 170.1 MB in the beginning and 167.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:21,274 INFO L168 Benchmark]: RCFGBuilder took 792.53 ms. Allocated memory is still 203.9 MB. Free memory was 167.5 MB in the beginning and 122.4 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:21,275 INFO L168 Benchmark]: TraceAbstraction took 7001.71 ms. Allocated memory was 203.9 MB in the beginning and 308.8 MB in the end (delta: 104.9 MB). Free memory was 122.4 MB in the beginning and 257.2 MB in the end (delta: -134.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:23:21,278 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 791.43 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 100.9 MB in the beginning and 170.7 MB in the end (delta: -69.8 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.11 ms. Allocated memory is still 203.9 MB. Free memory was 170.1 MB in the beginning and 167.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 792.53 ms. Allocated memory is still 203.9 MB. Free memory was 167.5 MB in the beginning and 122.4 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7001.71 ms. Allocated memory was 203.9 MB in the beginning and 308.8 MB in the end (delta: 104.9 MB). Free memory was 122.4 MB in the beginning and 257.2 MB in the end (delta: -134.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.9s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 476 SDslu, 917 SDs, 0 SdLazy, 1667 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 125 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 60563 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 10/48 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...