/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:04:22,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:04:22,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:04:23,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:04:23,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:04:23,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:04:23,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:04:23,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:04:23,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:04:23,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:04:23,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:04:23,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:04:23,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:04:23,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:04:23,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:04:23,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:04:23,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:04:23,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:04:23,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:04:23,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:04:23,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:04:23,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:04:23,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:04:23,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:04:23,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 22:04:23,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 22:04:23,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 22:04:23,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 22:04:23,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 22:04:23,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 22:04:23,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 22:04:23,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 22:04:23,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 22:04:23,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 22:04:23,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 22:04:23,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 22:04:23,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 22:04:23,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 22:04:23,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:04:23,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:04:23,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:04:23,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:04:23,103 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:04:23,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:04:23,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:04:23,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:04:23,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:04:23,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:04:23,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:04:23,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:04:23,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:04:23,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:04:23,108 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:04:23,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:04:23,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:04:23,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:04:23,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:04:23,110 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:04:23,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:04:23,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:04:23,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:04:23,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:04:23,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:04:23,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:04:23,111 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 22:04:23,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:04:23,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:04:23,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:04:23,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:04:23,608 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:04:23,609 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-09-04 22:04:23,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edf9a64e7/f87b09e43e8c4358b1ad18e8fad0ce53/FLAG67052ecde [2020-09-04 22:04:24,236 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:04:24,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-09-04 22:04:24,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edf9a64e7/f87b09e43e8c4358b1ad18e8fad0ce53/FLAG67052ecde [2020-09-04 22:04:24,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edf9a64e7/f87b09e43e8c4358b1ad18e8fad0ce53 [2020-09-04 22:04:24,532 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:04:24,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:04:24,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:04:24,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:04:24,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:04:24,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:04:24" (1/1) ... [2020-09-04 22:04:24,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f30a912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:24, skipping insertion in model container [2020-09-04 22:04:24,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:04:24" (1/1) ... [2020-09-04 22:04:24,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:04:24,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:04:25,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:04:25,074 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:04:25,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:04:25,216 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:04:25,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25 WrapperNode [2020-09-04 22:04:25,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:04:25,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:04:25,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:04:25,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:04:25,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (1/1) ... [2020-09-04 22:04:25,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (1/1) ... [2020-09-04 22:04:25,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (1/1) ... [2020-09-04 22:04:25,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (1/1) ... [2020-09-04 22:04:25,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (1/1) ... [2020-09-04 22:04:25,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (1/1) ... [2020-09-04 22:04:25,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (1/1) ... [2020-09-04 22:04:25,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:04:25,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:04:25,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:04:25,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:04:25,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (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 [2020-09-04 22:04:25,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:04:25,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:04:25,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 22:04:25,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 22:04:25,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-04 22:04:25,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-04 22:04:25,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-04 22:04:25,385 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 22:04:25,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:04:25,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:04:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:04:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 22:04:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 22:04:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 22:04:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 22:04:25,386 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 22:04:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 22:04:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 22:04:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 22:04:25,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 22:04:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 22:04:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 22:04:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 22:04:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 22:04:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 22:04:25,388 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 22:04:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 22:04:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 22:04:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 22:04:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-04 22:04:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-04 22:04:25,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-04 22:04:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 22:04:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 22:04:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 22:04:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 22:04:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 22:04:25,390 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 22:04:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 22:04:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 22:04:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 22:04:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 22:04:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 22:04:25,391 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 22:04:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 22:04:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 22:04:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 22:04:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 22:04:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 22:04:25,392 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 22:04:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 22:04:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 22:04:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 22:04:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 22:04:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 22:04:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 22:04:25,393 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 22:04:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 22:04:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 22:04:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 22:04:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 22:04:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 22:04:25,394 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 22:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 22:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 22:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 22:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 22:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 22:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 22:04:25,395 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 22:04:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 22:04:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 22:04:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 22:04:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 22:04:25,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 22:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 22:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 22:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 22:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 22:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 22:04:25,397 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 22:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 22:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 22:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 22:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 22:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 22:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 22:04:25,398 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 22:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 22:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 22:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 22:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 22:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 22:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 22:04:25,399 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 22:04:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 22:04:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 22:04:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 22:04:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 22:04:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 22:04:25,400 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 22:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 22:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 22:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 22:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 22:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 22:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 22:04:25,401 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 22:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 22:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 22:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 22:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 22:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 22:04:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 22:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 22:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 22:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 22:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 22:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 22:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 22:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 22:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 22:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:04:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:04:25,735 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 22:04:25,960 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:04:25,960 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-04 22:04:25,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:04:25 BoogieIcfgContainer [2020-09-04 22:04:25,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:04:25,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:04:25,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:04:25,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:04:25,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:04:24" (1/3) ... [2020-09-04 22:04:25,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71527c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:04:25, skipping insertion in model container [2020-09-04 22:04:25,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:25" (2/3) ... [2020-09-04 22:04:25,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71527c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:04:25, skipping insertion in model container [2020-09-04 22:04:25,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:04:25" (3/3) ... [2020-09-04 22:04:25,974 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-09-04 22:04:25,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:04:25,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:04:26,019 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:04:26,048 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:04:26,048 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:04:26,048 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:04:26,048 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:04:26,048 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:04:26,049 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:04:26,049 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:04:26,049 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:04:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-04 22:04:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 22:04:26,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:26,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:26,093 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:26,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times [2020-09-04 22:04:26,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:26,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201972058] [2020-09-04 22:04:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:26,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:26,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201972058] [2020-09-04 22:04:26,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:26,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:04:26,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772447541] [2020-09-04 22:04:26,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:04:26,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:04:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:04:26,413 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-09-04 22:04:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:26,624 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-09-04 22:04:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:04:26,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 22:04:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:26,637 INFO L225 Difference]: With dead ends: 110 [2020-09-04 22:04:26,637 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 22:04:26,642 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 [2020-09-04 22:04:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 22:04:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-04 22:04:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 22:04:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-09-04 22:04:26,696 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 22 [2020-09-04 22:04:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:26,697 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-09-04 22:04:26,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:04:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-09-04 22:04:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 22:04:26,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:26,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:26,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:04:26,700 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1237633361, now seen corresponding path program 1 times [2020-09-04 22:04:26,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:26,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687569755] [2020-09-04 22:04:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:26,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:26,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687569755] [2020-09-04 22:04:26,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:26,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:04:26,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250660486] [2020-09-04 22:04:26,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:04:26,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:04:26,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:04:26,867 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-09-04 22:04:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:27,147 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-09-04 22:04:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:04:27,148 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-09-04 22:04:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:27,150 INFO L225 Difference]: With dead ends: 134 [2020-09-04 22:04:27,150 INFO L226 Difference]: Without dead ends: 128 [2020-09-04 22:04:27,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:04:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-04 22:04:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2020-09-04 22:04:27,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 22:04:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-09-04 22:04:27,166 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2020-09-04 22:04:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:27,167 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-09-04 22:04:27,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:04:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-09-04 22:04:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 22:04:27,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:27,169 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:27,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:04:27,169 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times [2020-09-04 22:04:27,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:27,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721020969] [2020-09-04 22:04:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:27,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:27,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721020969] [2020-09-04 22:04:27,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:27,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:04:27,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775840591] [2020-09-04 22:04:27,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:04:27,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:04:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:04:27,281 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2020-09-04 22:04:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:27,529 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-09-04 22:04:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:04:27,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 22:04:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:27,532 INFO L225 Difference]: With dead ends: 137 [2020-09-04 22:04:27,532 INFO L226 Difference]: Without dead ends: 122 [2020-09-04 22:04:27,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:04:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-04 22:04:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67. [2020-09-04 22:04:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 22:04:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-09-04 22:04:27,547 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36 [2020-09-04 22:04:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:27,548 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-09-04 22:04:27,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:04:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-09-04 22:04:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 22:04:27,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:27,551 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:27,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:04:27,551 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times [2020-09-04 22:04:27,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:27,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036703077] [2020-09-04 22:04:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:27,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:27,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036703077] [2020-09-04 22:04:27,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:27,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:04:27,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215573302] [2020-09-04 22:04:27,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:04:27,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:27,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:04:27,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:04:27,713 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-09-04 22:04:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:27,947 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-09-04 22:04:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 22:04:27,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 22:04:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:27,949 INFO L225 Difference]: With dead ends: 119 [2020-09-04 22:04:27,949 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 22:04:27,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:04:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 22:04:27,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2020-09-04 22:04:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 22:04:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-04 22:04:27,959 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36 [2020-09-04 22:04:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:27,959 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-04 22:04:27,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:04:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-04 22:04:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 22:04:27,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:27,961 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:27,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:04:27,961 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times [2020-09-04 22:04:27,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:27,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934481365] [2020-09-04 22:04:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:28,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:28,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934481365] [2020-09-04 22:04:28,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:28,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 22:04:28,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621233747] [2020-09-04 22:04:28,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 22:04:28,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 22:04:28,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 22:04:28,295 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states. [2020-09-04 22:04:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:29,153 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2020-09-04 22:04:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 22:04:29,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-04 22:04:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:29,155 INFO L225 Difference]: With dead ends: 157 [2020-09-04 22:04:29,155 INFO L226 Difference]: Without dead ends: 144 [2020-09-04 22:04:29,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:04:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-04 22:04:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78. [2020-09-04 22:04:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 22:04:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-04 22:04:29,170 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 41 [2020-09-04 22:04:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:29,171 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-04 22:04:29,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 22:04:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-04 22:04:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 22:04:29,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:29,172 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:29,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 22:04:29,172 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times [2020-09-04 22:04:29,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:29,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732848611] [2020-09-04 22:04:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:29,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:29,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732848611] [2020-09-04 22:04:29,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:29,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 22:04:29,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194286473] [2020-09-04 22:04:29,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 22:04:29,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:29,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 22:04:29,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 22:04:29,440 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-04 22:04:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:30,288 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2020-09-04 22:04:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 22:04:30,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-04 22:04:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:30,290 INFO L225 Difference]: With dead ends: 181 [2020-09-04 22:04:30,291 INFO L226 Difference]: Without dead ends: 175 [2020-09-04 22:04:30,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:04:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-04 22:04:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2020-09-04 22:04:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-04 22:04:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-09-04 22:04:30,325 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 41 [2020-09-04 22:04:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:30,325 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-09-04 22:04:30,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 22:04:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-09-04 22:04:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 22:04:30,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:30,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:30,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 22:04:30,333 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times [2020-09-04 22:04:30,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:30,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919112159] [2020-09-04 22:04:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:30,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919112159] [2020-09-04 22:04:30,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:30,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:04:30,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009869003] [2020-09-04 22:04:30,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:04:30,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:04:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:04:30,730 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 16 states. [2020-09-04 22:04:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:31,739 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2020-09-04 22:04:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 22:04:31,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-04 22:04:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:31,742 INFO L225 Difference]: With dead ends: 165 [2020-09-04 22:04:31,742 INFO L226 Difference]: Without dead ends: 159 [2020-09-04 22:04:31,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:04:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-04 22:04:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2020-09-04 22:04:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-04 22:04:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-09-04 22:04:31,764 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 47 [2020-09-04 22:04:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:31,765 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-09-04 22:04:31,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:04:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-09-04 22:04:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 22:04:31,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:31,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:31,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 22:04:31,767 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:31,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times [2020-09-04 22:04:31,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:31,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190626641] [2020-09-04 22:04:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:32,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:32,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190626641] [2020-09-04 22:04:32,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:32,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:04:32,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2709212] [2020-09-04 22:04:32,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:04:32,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:04:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:04:32,087 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states. [2020-09-04 22:04:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:33,191 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2020-09-04 22:04:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 22:04:33,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-04 22:04:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:33,196 INFO L225 Difference]: With dead ends: 179 [2020-09-04 22:04:33,196 INFO L226 Difference]: Without dead ends: 173 [2020-09-04 22:04:33,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:04:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-04 22:04:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-09-04 22:04:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-04 22:04:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-09-04 22:04:33,217 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47 [2020-09-04 22:04:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:33,217 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-09-04 22:04:33,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:04:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-09-04 22:04:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 22:04:33,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:33,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:33,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 22:04:33,220 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times [2020-09-04 22:04:33,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:33,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297169763] [2020-09-04 22:04:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:33,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:33,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297169763] [2020-09-04 22:04:33,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:33,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 22:04:33,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495822979] [2020-09-04 22:04:33,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 22:04:33,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 22:04:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-04 22:04:33,478 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 15 states. [2020-09-04 22:04:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:34,213 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2020-09-04 22:04:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 22:04:34,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-09-04 22:04:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:34,215 INFO L225 Difference]: With dead ends: 196 [2020-09-04 22:04:34,215 INFO L226 Difference]: Without dead ends: 177 [2020-09-04 22:04:34,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-09-04 22:04:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-04 22:04:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 113. [2020-09-04 22:04:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-04 22:04:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-04 22:04:34,233 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 47 [2020-09-04 22:04:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:34,233 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-04 22:04:34,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 22:04:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-04 22:04:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 22:04:34,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:34,236 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:34,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 22:04:34,236 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:34,237 INFO L82 PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times [2020-09-04 22:04:34,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:34,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088715829] [2020-09-04 22:04:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:34,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:34,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088715829] [2020-09-04 22:04:34,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:34,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 22:04:34,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560414574] [2020-09-04 22:04:34,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 22:04:34,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 22:04:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:04:34,784 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 22 states. [2020-09-04 22:04:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:36,824 INFO L93 Difference]: Finished difference Result 201 states and 214 transitions. [2020-09-04 22:04:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 22:04:36,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-09-04 22:04:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:36,826 INFO L225 Difference]: With dead ends: 201 [2020-09-04 22:04:36,826 INFO L226 Difference]: Without dead ends: 195 [2020-09-04 22:04:36,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=2263, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 22:04:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-04 22:04:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 138. [2020-09-04 22:04:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-04 22:04:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2020-09-04 22:04:36,849 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 52 [2020-09-04 22:04:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:36,849 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2020-09-04 22:04:36,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 22:04:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2020-09-04 22:04:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 22:04:36,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:36,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:36,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 22:04:36,851 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times [2020-09-04 22:04:36,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:36,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374926636] [2020-09-04 22:04:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:37,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:37,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374926636] [2020-09-04 22:04:37,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:37,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 22:04:37,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081577228] [2020-09-04 22:04:37,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 22:04:37,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 22:04:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:04:37,352 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 22 states. [2020-09-04 22:04:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:39,394 INFO L93 Difference]: Finished difference Result 238 states and 255 transitions. [2020-09-04 22:04:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 22:04:39,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-09-04 22:04:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:39,396 INFO L225 Difference]: With dead ends: 238 [2020-09-04 22:04:39,397 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 22:04:39,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 22:04:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 22:04:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 150. [2020-09-04 22:04:39,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 22:04:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2020-09-04 22:04:39,419 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 52 [2020-09-04 22:04:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:39,420 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2020-09-04 22:04:39,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 22:04:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2020-09-04 22:04:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 22:04:39,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:39,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:39,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 22:04:39,422 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:39,422 INFO L82 PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times [2020-09-04 22:04:39,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:39,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501556031] [2020-09-04 22:04:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:39,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:39,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501556031] [2020-09-04 22:04:39,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:39,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:04:39,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765967477] [2020-09-04 22:04:39,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:04:39,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:04:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:04:39,729 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand 16 states. [2020-09-04 22:04:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:40,871 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-09-04 22:04:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 22:04:40,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-04 22:04:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:40,874 INFO L225 Difference]: With dead ends: 208 [2020-09-04 22:04:40,874 INFO L226 Difference]: Without dead ends: 193 [2020-09-04 22:04:40,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:04:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-04 22:04:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2020-09-04 22:04:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-04 22:04:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2020-09-04 22:04:40,897 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 53 [2020-09-04 22:04:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:40,898 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2020-09-04 22:04:40,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:04:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2020-09-04 22:04:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 22:04:40,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:40,899 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:40,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 22:04:40,900 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:40,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times [2020-09-04 22:04:40,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:40,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879926839] [2020-09-04 22:04:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:41,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879926839] [2020-09-04 22:04:41,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:41,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:04:41,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260683577] [2020-09-04 22:04:41,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:04:41,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:04:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:04:41,216 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand 16 states. [2020-09-04 22:04:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:42,245 INFO L93 Difference]: Finished difference Result 190 states and 203 transitions. [2020-09-04 22:04:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 22:04:42,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-04 22:04:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:42,247 INFO L225 Difference]: With dead ends: 190 [2020-09-04 22:04:42,248 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 22:04:42,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-04 22:04:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 22:04:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2020-09-04 22:04:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-04 22:04:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2020-09-04 22:04:42,270 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 53 [2020-09-04 22:04:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:42,270 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2020-09-04 22:04:42,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:04:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2020-09-04 22:04:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 22:04:42,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:42,271 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:42,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 22:04:42,272 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:42,272 INFO L82 PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times [2020-09-04 22:04:42,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:42,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999837653] [2020-09-04 22:04:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:42,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:42,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999837653] [2020-09-04 22:04:42,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:42,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:04:42,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889644832] [2020-09-04 22:04:42,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:04:42,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:04:42,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:04:42,569 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 16 states. [2020-09-04 22:04:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:43,654 INFO L93 Difference]: Finished difference Result 180 states and 191 transitions. [2020-09-04 22:04:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 22:04:43,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-04 22:04:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:43,656 INFO L225 Difference]: With dead ends: 180 [2020-09-04 22:04:43,656 INFO L226 Difference]: Without dead ends: 154 [2020-09-04 22:04:43,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-04 22:04:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-04 22:04:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 129. [2020-09-04 22:04:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-04 22:04:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2020-09-04 22:04:43,679 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 53 [2020-09-04 22:04:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:43,680 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2020-09-04 22:04:43,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:04:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2020-09-04 22:04:43,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 22:04:43,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:43,681 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:43,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 22:04:43,682 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:43,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1732440393, now seen corresponding path program 1 times [2020-09-04 22:04:43,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:43,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619241609] [2020-09-04 22:04:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:44,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:44,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619241609] [2020-09-04 22:04:44,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:44,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 22:04:44,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763036233] [2020-09-04 22:04:44,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 22:04:44,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 22:04:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:04:44,178 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand 22 states. [2020-09-04 22:04:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:45,982 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2020-09-04 22:04:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 22:04:45,983 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-04 22:04:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:45,984 INFO L225 Difference]: With dead ends: 207 [2020-09-04 22:04:45,984 INFO L226 Difference]: Without dead ends: 192 [2020-09-04 22:04:45,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 22:04:45,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-04 22:04:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2020-09-04 22:04:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-04 22:04:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2020-09-04 22:04:46,021 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 58 [2020-09-04 22:04:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:46,021 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2020-09-04 22:04:46,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 22:04:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2020-09-04 22:04:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 22:04:46,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:46,022 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:46,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 22:04:46,023 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times [2020-09-04 22:04:46,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:46,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46798324] [2020-09-04 22:04:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:46,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:46,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46798324] [2020-09-04 22:04:46,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:04:46,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 22:04:46,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779635578] [2020-09-04 22:04:46,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 22:04:46,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 22:04:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-09-04 22:04:46,798 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand 24 states. [2020-09-04 22:04:48,128 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-09-04 22:04:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:49,382 INFO L93 Difference]: Finished difference Result 208 states and 221 transitions. [2020-09-04 22:04:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 22:04:49,383 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-09-04 22:04:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:49,384 INFO L225 Difference]: With dead ends: 208 [2020-09-04 22:04:49,385 INFO L226 Difference]: Without dead ends: 195 [2020-09-04 22:04:49,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=424, Invalid=2438, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 22:04:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-04 22:04:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 154. [2020-09-04 22:04:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-04 22:04:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-09-04 22:04:49,407 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 58 [2020-09-04 22:04:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:49,407 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-09-04 22:04:49,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 22:04:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-09-04 22:04:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 22:04:49,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:49,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:04:49,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 22:04:49,409 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:49,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times [2020-09-04 22:04:49,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:49,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011903352] [2020-09-04 22:04:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:04:49,428 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:04:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:04:49,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:04:49,487 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:04:49,487 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:04:49,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 22:04:49,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:04:49 BoogieIcfgContainer [2020-09-04 22:04:49,545 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:04:49,547 INFO L168 Benchmark]: Toolchain (without parser) took 25013.75 ms. Allocated memory was 137.9 MB in the beginning and 438.3 MB in the end (delta: 300.4 MB). Free memory was 101.3 MB in the beginning and 222.0 MB in the end (delta: -120.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:49,548 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 22:04:49,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.78 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 101.1 MB in the beginning and 169.5 MB in the end (delta: -68.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:49,549 INFO L168 Benchmark]: Boogie Preprocessor took 83.04 ms. Allocated memory is still 203.4 MB. Free memory was 169.5 MB in the beginning and 166.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:49,550 INFO L168 Benchmark]: RCFGBuilder took 663.49 ms. Allocated memory is still 203.4 MB. Free memory was 166.8 MB in the beginning and 118.4 MB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:49,550 INFO L168 Benchmark]: TraceAbstraction took 23578.73 ms. Allocated memory was 203.4 MB in the beginning and 438.3 MB in the end (delta: 234.9 MB). Free memory was 117.7 MB in the beginning and 222.0 MB in the end (delta: -104.3 MB). Peak memory consumption was 130.6 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:49,554 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.78 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 101.1 MB in the beginning and 169.5 MB in the end (delta: -68.4 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.04 ms. Allocated memory is still 203.4 MB. Free memory was 169.5 MB in the beginning and 166.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 663.49 ms. Allocated memory is still 203.4 MB. Free memory was 166.8 MB in the beginning and 118.4 MB in the end (delta: 48.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23578.73 ms. Allocated memory was 203.4 MB in the beginning and 438.3 MB in the end (delta: 234.9 MB). Free memory was 117.7 MB in the beginning and 222.0 MB in the end (delta: -104.3 MB). Peak memory consumption was 130.6 MB. 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)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L522] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L523] List t; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L524] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L525] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] p->h = 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L527] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L528] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L529] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L530] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={-2:0}, t={-2:0}] [L530] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-2:0}, t={-2:0}] [L525] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L532] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L533] p->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-2:0}] [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L536] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] [L537] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-3:0}, t={-3:0}] [L537] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, p->n={-3:0}, t={-3:0}] [L532] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, t={-3:0}] [L539] p->h = 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-3:0}, t={-3:0}] [L540] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-3:0}] [L541] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L541] COND FALSE !(p->h == 2) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] COND TRUE p->h == 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-3:0}] [L544] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={-2:0}, t={-3:0}] [L544] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->n={-2:0}, t={-3:0}] [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L543] COND FALSE !(p->h == 1) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] COND TRUE p->h != 3 VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, p->h=2, t={-3:0}] [L546] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-1:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.4s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 17.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 938 SDtfs, 4005 SDslu, 8041 SDs, 0 SdLazy, 7072 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 510 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 12.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 778 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 784 NumberOfCodeBlocks, 784 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 710 ConstructedInterpolants, 0 QuantifiedInterpolants, 343822 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 26/103 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...