/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.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-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:08:40,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:08:40,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:08:40,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 23:08:40,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 23:08:40,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 23:08:40,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 23:08:40,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 23:08:40,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 23:08:40,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 23:08:40,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 23:08:40,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 23:08:40,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:08:40,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:08:40,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:08:40,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:08:40,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:08:40,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:08:41,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:08:41,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:08:41,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:08:41,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:08:41,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:08:41,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:08:41,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 23:08:41,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 23:08:41,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 23:08:41,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 23:08:41,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 23:08:41,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-02-23 23:08:41,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 23:08:41,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 23:08:41,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 23:08:41,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:08:41,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:08:41,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:08:41,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:08:41,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:08:41,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:08:41,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:08:41,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:08:41,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:08:41,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:08:41,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:08:41,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:08:41,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:08:41,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:08:41,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:08:41,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:08:41,095 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:08:41,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:08:41,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:08:41,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:08:41,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:08:41,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:08:41,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:08:41,096 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:08:41,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:08:41,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:08:41,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:08:41,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:08:41,566 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:08:41,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2021-02-23 23:08:41,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b0c8cb8/5497025be7e646cb8d2f33ae4c24da52/FLAG1eae2598a [2021-02-23 23:08:42,334 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:08:42,335 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2021-02-23 23:08:42,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b0c8cb8/5497025be7e646cb8d2f33ae4c24da52/FLAG1eae2598a [2021-02-23 23:08:42,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b0c8cb8/5497025be7e646cb8d2f33ae4c24da52 [2021-02-23 23:08:42,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:08:42,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:08:42,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:08:42,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:08:42,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:08:42,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:08:42" (1/1) ... [2021-02-23 23:08:42,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d9000c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:42, skipping insertion in model container [2021-02-23 23:08:42,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:08:42" (1/1) ... [2021-02-23 23:08:42,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:08:42,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:08:43,161 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-02-23 23:08:43,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:08:43,193 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:08:43,242 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2021-02-23 23:08:43,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:08:43,314 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:08:43,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43 WrapperNode [2021-02-23 23:08:43,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:08:43,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:08:43,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:08:43,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:08:43,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... [2021-02-23 23:08:43,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... [2021-02-23 23:08:43,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... [2021-02-23 23:08:43,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... [2021-02-23 23:08:43,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... [2021-02-23 23:08:43,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... [2021-02-23 23:08:43,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... [2021-02-23 23:08:43,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:08:43,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:08:43,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:08:43,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:08:43,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-23 23:08:43,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:08:43,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:08:43,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:08:43,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 23:08:43,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 23:08:43,580 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 23:08:43,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:08:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:08:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:08:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 23:08:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 23:08:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:08:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:08:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:08:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 23:08:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 23:08:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 23:08:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 23:08:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 23:08:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 23:08:43,588 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 23:08:43,589 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 23:08:43,589 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 23:08:43,589 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 23:08:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 23:08:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 23:08:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 23:08:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 23:08:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 23:08:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 23:08:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 23:08:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 23:08:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 23:08:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 23:08:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 23:08:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 23:08:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 23:08:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 23:08:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 23:08:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 23:08:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 23:08:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 23:08:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 23:08:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 23:08:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 23:08:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 23:08:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 23:08:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 23:08:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 23:08:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 23:08:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 23:08:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 23:08:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 23:08:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 23:08:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 23:08:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 23:08:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 23:08:43,600 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 23:08:43,600 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 23:08:43,600 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 23:08:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 23:08:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 23:08:43,601 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 23:08:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 23:08:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 23:08:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 23:08:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 23:08:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 23:08:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 23:08:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 23:08:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 23:08:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 23:08:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 23:08:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 23:08:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 23:08:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 23:08:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 23:08:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 23:08:43,605 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 23:08:43,605 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 23:08:43,606 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 23:08:43,606 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 23:08:43,606 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 23:08:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 23:08:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 23:08:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 23:08:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 23:08:43,608 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 23:08:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 23:08:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 23:08:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 23:08:43,610 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 23:08:43,610 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 23:08:43,610 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 23:08:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 23:08:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 23:08:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 23:08:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 23:08:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 23:08:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 23:08:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 23:08:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 23:08:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 23:08:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 23:08:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 23:08:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 23:08:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 23:08:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 23:08:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 23:08:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 23:08:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 23:08:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 23:08:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:08:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 23:08:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 23:08:43,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 23:08:43,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:08:43,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:08:43,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:08:43,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:08:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:08:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:08:44,038 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 23:08:44,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:08:44,444 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-02-23 23:08:44,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:08:44 BoogieIcfgContainer [2021-02-23 23:08:44,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:08:44,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:08:44,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:08:44,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:08:44,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:08:42" (1/3) ... [2021-02-23 23:08:44,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3aa72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:08:44, skipping insertion in model container [2021-02-23 23:08:44,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:08:43" (2/3) ... [2021-02-23 23:08:44,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3aa72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:08:44, skipping insertion in model container [2021-02-23 23:08:44,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:08:44" (3/3) ... [2021-02-23 23:08:44,466 INFO L111 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2021-02-23 23:08:44,475 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:08:44,483 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:08:44,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:08:44,542 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:08:44,544 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:08:44,549 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:08:44,550 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:08:44,550 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:08:44,550 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:08:44,550 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:08:44,550 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:08:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states. [2021-02-23 23:08:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 23:08:44,602 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:44,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:44,603 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash 119990243, now seen corresponding path program 1 times [2021-02-23 23:08:44,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:44,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893438924] [2021-02-23 23:08:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:44,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:44,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:44,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:44,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:44,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:44,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:44,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:44,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893438924] [2021-02-23 23:08:44,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:44,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 23:08:44,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453977825] [2021-02-23 23:08:44,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 23:08:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 23:08:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:08:44,978 INFO L87 Difference]: Start difference. First operand 182 states. Second operand 3 states. [2021-02-23 23:08:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:45,414 INFO L93 Difference]: Finished difference Result 347 states and 405 transitions. [2021-02-23 23:08:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 23:08:45,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2021-02-23 23:08:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:45,427 INFO L225 Difference]: With dead ends: 347 [2021-02-23 23:08:45,428 INFO L226 Difference]: Without dead ends: 170 [2021-02-23 23:08:45,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 23:08:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-23 23:08:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-02-23 23:08:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-02-23 23:08:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2021-02-23 23:08:45,524 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 35 [2021-02-23 23:08:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:45,525 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2021-02-23 23:08:45,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 23:08:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2021-02-23 23:08:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 23:08:45,528 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:45,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:45,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:08:45,529 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash 391291352, now seen corresponding path program 1 times [2021-02-23 23:08:45,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:45,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634182725] [2021-02-23 23:08:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:45,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:45,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:45,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:08:45,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:45,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:45,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:45,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:45,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634182725] [2021-02-23 23:08:45,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:45,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 23:08:45,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849707904] [2021-02-23 23:08:45,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 23:08:45,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 23:08:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:08:45,752 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand 5 states. [2021-02-23 23:08:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:46,166 INFO L93 Difference]: Finished difference Result 255 states and 281 transitions. [2021-02-23 23:08:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 23:08:46,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-02-23 23:08:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:46,171 INFO L225 Difference]: With dead ends: 255 [2021-02-23 23:08:46,171 INFO L226 Difference]: Without dead ends: 205 [2021-02-23 23:08:46,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 23:08:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-02-23 23:08:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-02-23 23:08:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-02-23 23:08:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 226 transitions. [2021-02-23 23:08:46,200 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 226 transitions. Word has length 45 [2021-02-23 23:08:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:46,200 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 226 transitions. [2021-02-23 23:08:46,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 23:08:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 226 transitions. [2021-02-23 23:08:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 23:08:46,204 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:46,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:46,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:08:46,205 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash -148109217, now seen corresponding path program 1 times [2021-02-23 23:08:46,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:46,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920150141] [2021-02-23 23:08:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:46,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:46,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 23:08:46,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:46,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:46,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:46,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 23:08:46,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:46,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:46,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:46,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920150141] [2021-02-23 23:08:46,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:46,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:08:46,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798277901] [2021-02-23 23:08:46,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:08:46,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:46,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:08:46,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:08:46,471 INFO L87 Difference]: Start difference. First operand 204 states and 226 transitions. Second operand 7 states. [2021-02-23 23:08:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:47,227 INFO L93 Difference]: Finished difference Result 534 states and 600 transitions. [2021-02-23 23:08:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 23:08:47,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2021-02-23 23:08:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:47,231 INFO L225 Difference]: With dead ends: 534 [2021-02-23 23:08:47,232 INFO L226 Difference]: Without dead ends: 415 [2021-02-23 23:08:47,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-23 23:08:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-02-23 23:08:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 288. [2021-02-23 23:08:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2021-02-23 23:08:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 323 transitions. [2021-02-23 23:08:47,286 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 323 transitions. Word has length 58 [2021-02-23 23:08:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:47,287 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 323 transitions. [2021-02-23 23:08:47,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:08:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 323 transitions. [2021-02-23 23:08:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 23:08:47,290 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:47,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:47,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:08:47,290 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1210876604, now seen corresponding path program 1 times [2021-02-23 23:08:47,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941472808] [2021-02-23 23:08:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:47,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:47,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:47,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:47,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:47,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:47,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:47,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:47,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:47,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:47,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:47,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:47,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:47,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:47,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:47,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:08:47,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941472808] [2021-02-23 23:08:47,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:47,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:08:47,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140986283] [2021-02-23 23:08:47,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:08:47,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:47,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:08:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:08:47,461 INFO L87 Difference]: Start difference. First operand 288 states and 323 transitions. Second operand 7 states. [2021-02-23 23:08:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:47,933 INFO L93 Difference]: Finished difference Result 365 states and 405 transitions. [2021-02-23 23:08:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:08:47,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2021-02-23 23:08:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:47,937 INFO L225 Difference]: With dead ends: 365 [2021-02-23 23:08:47,937 INFO L226 Difference]: Without dead ends: 359 [2021-02-23 23:08:47,938 INFO L677 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 [2021-02-23 23:08:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-02-23 23:08:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 301. [2021-02-23 23:08:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2021-02-23 23:08:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 339 transitions. [2021-02-23 23:08:47,986 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 339 transitions. Word has length 60 [2021-02-23 23:08:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 339 transitions. [2021-02-23 23:08:47,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:08:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 339 transitions. [2021-02-23 23:08:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-23 23:08:47,989 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:47,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:47,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:08:47,991 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:47,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1932040588, now seen corresponding path program 1 times [2021-02-23 23:08:47,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:47,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391079611] [2021-02-23 23:08:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:48,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:48,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:48,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:48,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:48,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:48,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:48,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:48,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:08:48,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391079611] [2021-02-23 23:08:48,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:48,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:08:48,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136061016] [2021-02-23 23:08:48,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:08:48,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:08:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:08:48,153 INFO L87 Difference]: Start difference. First operand 301 states and 339 transitions. Second operand 7 states. [2021-02-23 23:08:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:48,630 INFO L93 Difference]: Finished difference Result 368 states and 408 transitions. [2021-02-23 23:08:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 23:08:48,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2021-02-23 23:08:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:48,633 INFO L225 Difference]: With dead ends: 368 [2021-02-23 23:08:48,634 INFO L226 Difference]: Without dead ends: 353 [2021-02-23 23:08:48,635 INFO L677 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 [2021-02-23 23:08:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-02-23 23:08:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 298. [2021-02-23 23:08:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2021-02-23 23:08:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2021-02-23 23:08:48,667 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 66 [2021-02-23 23:08:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:48,668 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2021-02-23 23:08:48,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:08:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2021-02-23 23:08:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-23 23:08:48,669 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:48,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:48,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 23:08:48,670 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash -895358812, now seen corresponding path program 1 times [2021-02-23 23:08:48,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:48,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505984694] [2021-02-23 23:08:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:48,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:48,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:48,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:48,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:48,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:48,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:48,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:48,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:48,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:08:48,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505984694] [2021-02-23 23:08:48,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:08:48,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 23:08:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439781863] [2021-02-23 23:08:48,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 23:08:48,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:48,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 23:08:48,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 23:08:48,831 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand 7 states. [2021-02-23 23:08:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:49,341 INFO L93 Difference]: Finished difference Result 350 states and 389 transitions. [2021-02-23 23:08:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 23:08:49,342 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2021-02-23 23:08:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:49,345 INFO L225 Difference]: With dead ends: 350 [2021-02-23 23:08:49,345 INFO L226 Difference]: Without dead ends: 326 [2021-02-23 23:08:49,346 INFO L677 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 [2021-02-23 23:08:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-02-23 23:08:49,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 293. [2021-02-23 23:08:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2021-02-23 23:08:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 329 transitions. [2021-02-23 23:08:49,382 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 329 transitions. Word has length 66 [2021-02-23 23:08:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:49,382 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 329 transitions. [2021-02-23 23:08:49,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 23:08:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 329 transitions. [2021-02-23 23:08:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 23:08:49,384 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:49,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:49,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 23:08:49,385 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1730428090, now seen corresponding path program 1 times [2021-02-23 23:08:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:49,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805246747] [2021-02-23 23:08:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:49,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:49,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:49,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:49,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:08:49,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:08:49,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:08:49,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:08:49,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 23:08:49,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:08:49,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:49,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:49,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:49,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:49,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:49,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:49,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:49,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:08:49,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805246747] [2021-02-23 23:08:49,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:49,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:08:49,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801056728] [2021-02-23 23:08:49,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:08:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:49,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:08:49,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:08:49,669 INFO L87 Difference]: Start difference. First operand 293 states and 329 transitions. Second operand 15 states. [2021-02-23 23:08:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:50,853 INFO L93 Difference]: Finished difference Result 375 states and 415 transitions. [2021-02-23 23:08:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 23:08:50,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-02-23 23:08:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:50,863 INFO L225 Difference]: With dead ends: 375 [2021-02-23 23:08:50,863 INFO L226 Difference]: Without dead ends: 362 [2021-02-23 23:08:50,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-02-23 23:08:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-02-23 23:08:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 309. [2021-02-23 23:08:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2021-02-23 23:08:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 346 transitions. [2021-02-23 23:08:50,901 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 346 transitions. Word has length 71 [2021-02-23 23:08:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:50,903 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 346 transitions. [2021-02-23 23:08:50,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:08:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 346 transitions. [2021-02-23 23:08:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-23 23:08:50,905 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:50,906 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:50,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 23:08:50,906 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:50,907 INFO L82 PathProgramCache]: Analyzing trace with hash -864922744, now seen corresponding path program 1 times [2021-02-23 23:08:50,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:50,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037837821] [2021-02-23 23:08:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:51,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:51,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:51,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:51,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:08:51,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:08:51,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:08:51,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:08:51,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 23:08:51,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:08:51,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:51,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:51,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:51,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:51,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:51,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:51,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:51,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:08:51,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037837821] [2021-02-23 23:08:51,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:51,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:08:51,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110037282] [2021-02-23 23:08:51,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:08:51,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:08:51,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:08:51,254 INFO L87 Difference]: Start difference. First operand 309 states and 346 transitions. Second operand 15 states. [2021-02-23 23:08:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:52,485 INFO L93 Difference]: Finished difference Result 391 states and 433 transitions. [2021-02-23 23:08:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 23:08:52,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-02-23 23:08:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:52,488 INFO L225 Difference]: With dead ends: 391 [2021-02-23 23:08:52,488 INFO L226 Difference]: Without dead ends: 385 [2021-02-23 23:08:52,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-02-23 23:08:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-02-23 23:08:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 331. [2021-02-23 23:08:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-23 23:08:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 371 transitions. [2021-02-23 23:08:52,525 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 371 transitions. Word has length 71 [2021-02-23 23:08:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:52,525 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 371 transitions. [2021-02-23 23:08:52,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:08:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 371 transitions. [2021-02-23 23:08:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 23:08:52,527 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:52,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:52,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 23:08:52,528 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:52,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1905896482, now seen corresponding path program 1 times [2021-02-23 23:08:52,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:52,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365085796] [2021-02-23 23:08:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:52,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:52,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:52,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:52,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:52,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:52,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:52,650 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 23:08:52,651 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 23:08:52,669 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:08:52,673 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:08:52,688 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:08:52,689 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:08:52,705 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 23:08:52,708 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 23:08:52,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:08:52,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:08:52,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:08:52,797 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:08:52,798 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:08:52,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:52,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:52,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:52,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:52,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:52,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:52,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:52,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365085796] [2021-02-23 23:08:52,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:52,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 23:08:52,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947886460] [2021-02-23 23:08:52,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 23:08:52,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:52,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 23:08:52,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:08:52,959 INFO L87 Difference]: Start difference. First operand 331 states and 371 transitions. Second operand 18 states. [2021-02-23 23:08:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:54,747 INFO L93 Difference]: Finished difference Result 396 states and 439 transitions. [2021-02-23 23:08:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 23:08:54,748 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2021-02-23 23:08:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:54,750 INFO L225 Difference]: With dead ends: 396 [2021-02-23 23:08:54,751 INFO L226 Difference]: Without dead ends: 390 [2021-02-23 23:08:54,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 23:08:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-02-23 23:08:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 335. [2021-02-23 23:08:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2021-02-23 23:08:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2021-02-23 23:08:54,798 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 77 [2021-02-23 23:08:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:54,799 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2021-02-23 23:08:54,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 23:08:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2021-02-23 23:08:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 23:08:54,801 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:54,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:54,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 23:08:54,801 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1090022976, now seen corresponding path program 1 times [2021-02-23 23:08:54,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:54,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530339248] [2021-02-23 23:08:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:54,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:54,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:54,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:54,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:54,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:54,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:54,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:54,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:54,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:54,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:54,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:54,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:54,918 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 23:08:54,919 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 23:08:54,933 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:08:54,934 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:08:54,949 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:08:54,950 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:08:54,967 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 23:08:54,968 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 23:08:54,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:54,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:08:55,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:55,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:08:55,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:55,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:08:55,048 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:08:55,049 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:08:55,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:55,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:55,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:55,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:55,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:55,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:55,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:55,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:55,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:55,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:55,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:08:55,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530339248] [2021-02-23 23:08:55,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:55,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 23:08:55,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93487390] [2021-02-23 23:08:55,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 23:08:55,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:55,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 23:08:55,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:08:55,218 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand 18 states. [2021-02-23 23:08:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:57,013 INFO L93 Difference]: Finished difference Result 410 states and 453 transitions. [2021-02-23 23:08:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 23:08:57,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2021-02-23 23:08:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:57,016 INFO L225 Difference]: With dead ends: 410 [2021-02-23 23:08:57,016 INFO L226 Difference]: Without dead ends: 404 [2021-02-23 23:08:57,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 23:08:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-02-23 23:08:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 344. [2021-02-23 23:08:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2021-02-23 23:08:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 385 transitions. [2021-02-23 23:08:57,058 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 385 transitions. Word has length 77 [2021-02-23 23:08:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:57,059 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 385 transitions. [2021-02-23 23:08:57,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 23:08:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 385 transitions. [2021-02-23 23:08:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 23:08:57,060 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:57,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:57,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 23:08:57,061 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2126704752, now seen corresponding path program 1 times [2021-02-23 23:08:57,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:57,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509055251] [2021-02-23 23:08:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:57,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:57,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:57,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:08:57,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:08:57,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:08:57,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:08:57,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 23:08:57,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 23:08:57,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 23:08:57,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:57,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:57,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:57,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:57,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:57,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:57,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:57,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:08:57,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509055251] [2021-02-23 23:08:57,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:57,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 23:08:57,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994241931] [2021-02-23 23:08:57,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 23:08:57,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 23:08:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:08:57,344 INFO L87 Difference]: Start difference. First operand 344 states and 385 transitions. Second operand 15 states. [2021-02-23 23:08:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:08:58,514 INFO L93 Difference]: Finished difference Result 406 states and 449 transitions. [2021-02-23 23:08:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 23:08:58,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2021-02-23 23:08:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:08:58,518 INFO L225 Difference]: With dead ends: 406 [2021-02-23 23:08:58,518 INFO L226 Difference]: Without dead ends: 387 [2021-02-23 23:08:58,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-02-23 23:08:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-02-23 23:08:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 344. [2021-02-23 23:08:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2021-02-23 23:08:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 384 transitions. [2021-02-23 23:08:58,553 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 384 transitions. Word has length 77 [2021-02-23 23:08:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:08:58,554 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 384 transitions. [2021-02-23 23:08:58,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 23:08:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 384 transitions. [2021-02-23 23:08:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-02-23 23:08:58,555 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:08:58,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:08:58,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 23:08:58,556 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:08:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:08:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 445708284, now seen corresponding path program 2 times [2021-02-23 23:08:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:08:58,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305020825] [2021-02-23 23:08:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:08:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:58,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:58,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:58,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:08:58,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:58,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:08:58,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:08:58,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:08:58,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:08:58,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:58,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:08:58,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:58,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:58,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:58,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:08:58,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:08:58,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:08:58,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:58,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:08:58,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:08:58,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:58,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:08:59,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:59,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:08:59,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:59,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:59,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:08:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:08:59,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:08:59,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:08:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:08:59,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305020825] [2021-02-23 23:08:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:08:59,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:08:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004484864] [2021-02-23 23:08:59,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:08:59,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:08:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:08:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:08:59,127 INFO L87 Difference]: Start difference. First operand 344 states and 384 transitions. Second operand 22 states. [2021-02-23 23:09:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:01,865 INFO L93 Difference]: Finished difference Result 425 states and 469 transitions. [2021-02-23 23:09:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-23 23:09:01,866 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2021-02-23 23:09:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:01,868 INFO L225 Difference]: With dead ends: 425 [2021-02-23 23:09:01,868 INFO L226 Difference]: Without dead ends: 419 [2021-02-23 23:09:01,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=530, Invalid=2226, Unknown=0, NotChecked=0, Total=2756 [2021-02-23 23:09:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-02-23 23:09:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 358. [2021-02-23 23:09:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2021-02-23 23:09:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 399 transitions. [2021-02-23 23:09:01,915 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 399 transitions. Word has length 82 [2021-02-23 23:09:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:01,915 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 399 transitions. [2021-02-23 23:09:01,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:09:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 399 transitions. [2021-02-23 23:09:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-02-23 23:09:01,917 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:01,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:01,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 23:09:01,918 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:01,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1840002158, now seen corresponding path program 1 times [2021-02-23 23:09:01,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:01,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060398443] [2021-02-23 23:09:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:01,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:01,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:01,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:01,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:01,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:01,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:01,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:01,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:02,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:02,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:09:02,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:09:02,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:09:02,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:02,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:09:02,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:02,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:02,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:02,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:09:02,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:09:02,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:09:02,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:02,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:02,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:09:02,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:02,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:02,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:02,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:02,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:02,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:09:02,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060398443] [2021-02-23 23:09:02,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:02,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:09:02,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626652475] [2021-02-23 23:09:02,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:09:02,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:02,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:09:02,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:09:02,536 INFO L87 Difference]: Start difference. First operand 358 states and 399 transitions. Second operand 22 states. [2021-02-23 23:09:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:05,197 INFO L93 Difference]: Finished difference Result 459 states and 506 transitions. [2021-02-23 23:09:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-23 23:09:05,197 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2021-02-23 23:09:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:05,201 INFO L225 Difference]: With dead ends: 459 [2021-02-23 23:09:05,201 INFO L226 Difference]: Without dead ends: 453 [2021-02-23 23:09:05,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=545, Invalid=2317, Unknown=0, NotChecked=0, Total=2862 [2021-02-23 23:09:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-02-23 23:09:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 370. [2021-02-23 23:09:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2021-02-23 23:09:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 412 transitions. [2021-02-23 23:09:05,250 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 412 transitions. Word has length 82 [2021-02-23 23:09:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:05,250 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 412 transitions. [2021-02-23 23:09:05,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:09:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 412 transitions. [2021-02-23 23:09:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 23:09:05,252 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:05,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:05,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 23:09:05,252 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash 599616346, now seen corresponding path program 1 times [2021-02-23 23:09:05,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:05,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932430898] [2021-02-23 23:09:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:05,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:05,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:05,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:05,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:05,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:05,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:05,363 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 23:09:05,363 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 23:09:05,378 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:09:05,379 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:09:05,394 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:09:05,396 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:09:05,411 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 23:09:05,412 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 23:09:05,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:05,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:05,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:09:05,495 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:09:05,496 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:09:05,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:05,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:05,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:05,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:05,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:05,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:05,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:09:05,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932430898] [2021-02-23 23:09:05,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:05,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 23:09:05,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78423253] [2021-02-23 23:09:05,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 23:09:05,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:05,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 23:09:05,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:09:05,649 INFO L87 Difference]: Start difference. First operand 370 states and 412 transitions. Second operand 18 states. [2021-02-23 23:09:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:07,360 INFO L93 Difference]: Finished difference Result 436 states and 481 transitions. [2021-02-23 23:09:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 23:09:07,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2021-02-23 23:09:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:07,366 INFO L225 Difference]: With dead ends: 436 [2021-02-23 23:09:07,366 INFO L226 Difference]: Without dead ends: 421 [2021-02-23 23:09:07,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 23:09:07,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-02-23 23:09:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 372. [2021-02-23 23:09:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2021-02-23 23:09:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 414 transitions. [2021-02-23 23:09:07,418 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 414 transitions. Word has length 83 [2021-02-23 23:09:07,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:07,418 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 414 transitions. [2021-02-23 23:09:07,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 23:09:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 414 transitions. [2021-02-23 23:09:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 23:09:07,420 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:07,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:07,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 23:09:07,421 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1636298122, now seen corresponding path program 2 times [2021-02-23 23:09:07,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:07,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294369922] [2021-02-23 23:09:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:07,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:07,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:07,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:07,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:07,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:07,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:07,514 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 23:09:07,515 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 23:09:07,535 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:09:07,536 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:09:07,552 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:09:07,553 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:09:07,572 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 23:09:07,573 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 23:09:07,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:07,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:07,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:09:07,671 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:09:07,672 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:09:07,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:07,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:07,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:07,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:07,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:07,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:07,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:09:07,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294369922] [2021-02-23 23:09:07,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:07,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 23:09:07,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044777601] [2021-02-23 23:09:07,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 23:09:07,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 23:09:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:09:07,844 INFO L87 Difference]: Start difference. First operand 372 states and 414 transitions. Second operand 18 states. [2021-02-23 23:09:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:09,454 INFO L93 Difference]: Finished difference Result 418 states and 462 transitions. [2021-02-23 23:09:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 23:09:09,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2021-02-23 23:09:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:09,458 INFO L225 Difference]: With dead ends: 418 [2021-02-23 23:09:09,458 INFO L226 Difference]: Without dead ends: 388 [2021-02-23 23:09:09,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 23:09:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-02-23 23:09:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 361. [2021-02-23 23:09:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-02-23 23:09:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 402 transitions. [2021-02-23 23:09:09,518 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 402 transitions. Word has length 83 [2021-02-23 23:09:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:09,519 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 402 transitions. [2021-02-23 23:09:09,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 23:09:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 402 transitions. [2021-02-23 23:09:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-02-23 23:09:09,521 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:09,521 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:09,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 23:09:09,522 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash 545103608, now seen corresponding path program 2 times [2021-02-23 23:09:09,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:09,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426190780] [2021-02-23 23:09:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:09,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:09,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:09,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:09,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:09,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:09,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:09,644 WARN L141 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size [2021-02-23 23:09:09,645 WARN L147 QuantifierPusher]: treesize reduction 15, result has 50.0 percent of original size 15 [2021-02-23 23:09:09,661 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:09:09,662 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:09:09,679 WARN L141 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size [2021-02-23 23:09:09,680 WARN L147 QuantifierPusher]: treesize reduction 15, result has 48.3 percent of original size 14 [2021-02-23 23:09:09,699 WARN L141 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size [2021-02-23 23:09:09,700 WARN L147 QuantifierPusher]: treesize reduction 15, result has 57.1 percent of original size 20 [2021-02-23 23:09:09,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:09,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:09,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 23:09:09,785 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:09:09,785 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:09:09,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:09,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:09,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:09,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:09,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:09,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:09,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:09:09,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426190780] [2021-02-23 23:09:09,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:09,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 23:09:09,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596310671] [2021-02-23 23:09:09,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 23:09:09,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:09,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 23:09:09,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-02-23 23:09:09,941 INFO L87 Difference]: Start difference. First operand 361 states and 402 transitions. Second operand 18 states. [2021-02-23 23:09:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:11,697 INFO L93 Difference]: Finished difference Result 400 states and 442 transitions. [2021-02-23 23:09:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 23:09:11,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2021-02-23 23:09:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:11,701 INFO L225 Difference]: With dead ends: 400 [2021-02-23 23:09:11,701 INFO L226 Difference]: Without dead ends: 374 [2021-02-23 23:09:11,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 23:09:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-02-23 23:09:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 347. [2021-02-23 23:09:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2021-02-23 23:09:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 387 transitions. [2021-02-23 23:09:11,745 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 387 transitions. Word has length 83 [2021-02-23 23:09:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:11,745 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 387 transitions. [2021-02-23 23:09:11,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 23:09:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 387 transitions. [2021-02-23 23:09:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:09:11,747 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:11,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:11,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 23:09:11,747 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1994320820, now seen corresponding path program 1 times [2021-02-23 23:09:11,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:11,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229471930] [2021-02-23 23:09:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:11,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:11,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:11,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:11,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:11,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 23:09:11,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:09:11,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 23:09:11,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:09:11,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:11,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:09:11,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:11,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:11,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:11,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:11,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 23:09:12,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:09:12,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 23:09:12,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:12,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:09:12,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:09:12,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:12,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:12,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:12,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:12,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:12,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 23:09:12,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229471930] [2021-02-23 23:09:12,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:12,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 23:09:12,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326239074] [2021-02-23 23:09:12,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 23:09:12,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 23:09:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-23 23:09:12,307 INFO L87 Difference]: Start difference. First operand 347 states and 387 transitions. Second operand 22 states. [2021-02-23 23:09:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:14,687 INFO L93 Difference]: Finished difference Result 425 states and 469 transitions. [2021-02-23 23:09:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-23 23:09:14,687 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2021-02-23 23:09:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:14,691 INFO L225 Difference]: With dead ends: 425 [2021-02-23 23:09:14,691 INFO L226 Difference]: Without dead ends: 410 [2021-02-23 23:09:14,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-02-23 23:09:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-23 23:09:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 365. [2021-02-23 23:09:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2021-02-23 23:09:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 406 transitions. [2021-02-23 23:09:14,741 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 406 transitions. Word has length 88 [2021-02-23 23:09:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:14,741 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 406 transitions. [2021-02-23 23:09:14,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 23:09:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 406 transitions. [2021-02-23 23:09:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:09:14,743 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:14,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:14,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 23:09:14,743 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1263964700, now seen corresponding path program 3 times [2021-02-23 23:09:14,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:14,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306024706] [2021-02-23 23:09:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:14,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:14,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:14,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:14,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:14,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:14,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 23:09:14,865 WARN L141 QuantifierPusher]: treesize reduction 18, result has 45.5 percent of original size [2021-02-23 23:09:14,866 WARN L147 QuantifierPusher]: treesize reduction 18, result has 45.5 percent of original size 15 [2021-02-23 23:09:14,880 WARN L141 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-02-23 23:09:14,880 WARN L147 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size 19 [2021-02-23 23:09:14,896 WARN L141 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size [2021-02-23 23:09:14,897 WARN L147 QuantifierPusher]: treesize reduction 18, result has 51.4 percent of original size 19 [2021-02-23 23:09:14,915 WARN L141 QuantifierPusher]: treesize reduction 18, result has 63.3 percent of original size [2021-02-23 23:09:14,916 WARN L147 QuantifierPusher]: treesize reduction 18, result has 63.3 percent of original size 31 [2021-02-23 23:09:14,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:09:14,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:09:14,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:14,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 23:09:15,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 23:09:15,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-02-23 23:09:15,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-23 23:09:15,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 23:09:15,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 23:09:15,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 23:09:15,299 WARN L141 QuantifierPusher]: treesize reduction 8, result has 79.5 percent of original size [2021-02-23 23:09:15,303 WARN L147 QuantifierPusher]: treesize reduction 8, result has 79.5 percent of original size 31 [2021-02-23 23:09:15,343 WARN L141 QuantifierPusher]: treesize reduction 8, result has 77.1 percent of original size [2021-02-23 23:09:15,344 WARN L147 QuantifierPusher]: treesize reduction 8, result has 77.1 percent of original size 27 [2021-02-23 23:09:15,384 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size [2021-02-23 23:09:15,385 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.9 percent of original size 23 [2021-02-23 23:09:15,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:15,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:09:15,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:09:15,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:15,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:09:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:09:15,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:09:15,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:09:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:09:15,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306024706] [2021-02-23 23:09:15,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 23:09:15,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-02-23 23:09:15,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320423912] [2021-02-23 23:09:15,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-23 23:09:15,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:09:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-23 23:09:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-02-23 23:09:15,626 INFO L87 Difference]: Start difference. First operand 365 states and 406 transitions. Second operand 26 states. [2021-02-23 23:09:17,441 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-02-23 23:09:17,611 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-02-23 23:09:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:09:18,908 INFO L93 Difference]: Finished difference Result 429 states and 473 transitions. [2021-02-23 23:09:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-23 23:09:18,909 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 88 [2021-02-23 23:09:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:09:18,912 INFO L225 Difference]: With dead ends: 429 [2021-02-23 23:09:18,913 INFO L226 Difference]: Without dead ends: 416 [2021-02-23 23:09:18,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=558, Invalid=2748, Unknown=0, NotChecked=0, Total=3306 [2021-02-23 23:09:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-02-23 23:09:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 371. [2021-02-23 23:09:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2021-02-23 23:09:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 412 transitions. [2021-02-23 23:09:18,974 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 412 transitions. Word has length 88 [2021-02-23 23:09:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:09:18,974 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 412 transitions. [2021-02-23 23:09:18,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-23 23:09:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 412 transitions. [2021-02-23 23:09:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 23:09:18,976 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:09:18,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:09:18,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 23:09:18,977 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:09:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:09:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1310952102, now seen corresponding path program 1 times [2021-02-23 23:09:18,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:09:18,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007050414] [2021-02-23 23:09:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:09:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:09:19,015 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:09:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:09:19,043 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:09:19,105 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:09:19,105 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:09:19,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 23:09:19,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:09:19 BoogieIcfgContainer [2021-02-23 23:09:19,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:09:19,255 INFO L168 Benchmark]: Toolchain (without parser) took 36600.75 ms. Allocated memory was 166.7 MB in the beginning and 358.6 MB in the end (delta: 191.9 MB). Free memory was 142.2 MB in the beginning and 195.4 MB in the end (delta: -53.3 MB). Peak memory consumption was 139.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:19,255 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 166.7 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:09:19,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.13 ms. Allocated memory is still 166.7 MB. Free memory was 141.0 MB in the beginning and 118.6 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:19,255 INFO L168 Benchmark]: Boogie Preprocessor took 155.26 ms. Allocated memory is still 166.7 MB. Free memory was 118.6 MB in the beginning and 146.9 MB in the end (delta: -28.3 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:19,255 INFO L168 Benchmark]: RCFGBuilder took 975.83 ms. Allocated memory is still 166.7 MB. Free memory was 146.9 MB in the beginning and 141.6 MB in the end (delta: 5.3 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:19,256 INFO L168 Benchmark]: TraceAbstraction took 34801.83 ms. Allocated memory was 166.7 MB in the beginning and 358.6 MB in the end (delta: 191.9 MB). Free memory was 141.1 MB in the beginning and 195.4 MB in the end (delta: -54.4 MB). Peak memory consumption was 137.5 MB. Max. memory is 8.0 GB. [2021-02-23 23:09:19,256 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 166.7 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 642.13 ms. Allocated memory is still 166.7 MB. Free memory was 141.0 MB in the beginning and 118.6 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 155.26 ms. Allocated memory is still 166.7 MB. Free memory was 118.6 MB in the beginning and 146.9 MB in the end (delta: -28.3 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 975.83 ms. Allocated memory is still 166.7 MB. Free memory was 146.9 MB in the beginning and 141.6 MB in the end (delta: 5.3 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34801.83 ms. Allocated memory was 166.7 MB in the beginning and 358.6 MB in the end (delta: 191.9 MB). Free memory was 141.1 MB in the beginning and 195.4 MB in the end (delta: -54.4 MB). Peak memory consumption was 137.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 620]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; VAL [malloc(sizeof(*root))={-1:0}, root={-1:0}] [L553] root->left = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, root={-1:0}] [L554] root->right = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, root={-1:0}] [L555] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, malloc(sizeof(*root))={-1:0}, root={-1:0}] [L574] n = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, root={-1:0}] [L575] struct TreeNode* pred; VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, root={-1:0}] [L576] COND TRUE \read(*root) VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, root={-1:0}] [L577] pred = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, n={0:0}, pred={0:0}, root={-1:0}] [L578] n = root VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={-1:0}] [L579] EXPR n->left VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, pred={0:0}, root={-1:0}] [L579] n->left || n->right VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, pred={0:0}, root={-1:0}] [L579] EXPR n->right VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L579] n->left || n->right VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L579] COND FALSE !(n->left || n->right) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L586] COND FALSE !(\read(*pred)) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={-1:0}] [L592] root = ((void *)0) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={0:0}] [L576] COND FALSE !(\read(*root)) VAL [malloc(sizeof(*root))={-1:0}, n={-1:0}, pred={0:0}, root={0:0}] [L595] List a = (List) malloc(sizeof(struct node)); VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L596] COND FALSE !(a == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L597] List t; VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, pred={0:0}, root={0:0}] [L598] List p = a; VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}] [L599] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}] [L600] p->h = 1 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}] [L601] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L602] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L603] p->n = t VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-3:0}] [L604] EXPR p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-2:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L604] p = p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-3:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L599] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L606] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L607] p->h = 2 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-3:0}] [L608] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L609] COND FALSE !(t == 0) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L610] p->n = t VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L611] EXPR p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->n={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L611] p = p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-4:0}, p->n={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L606] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L613] p->h = 3 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-4:0}, pred={0:0}, root={0:0}, t={-4:0}] [L614] p = a VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, pred={0:0}, root={0:0}, t={-4:0}] [L615] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L615] COND FALSE !(p->h == 2) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L617] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L617] COND TRUE p->h == 1 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, root={0:0}, t={-4:0}] [L618] EXPR p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-2:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L618] p = p->n VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->n={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] [L617] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L617] COND FALSE !(p->h == 1) VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L619] EXPR p->h VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L619] COND TRUE p->h != 3 VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, root={0:0}, t={-4:0}] [L620] reach_error() VAL [a={-2:0}, malloc(sizeof(*root))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, malloc(sizeof(struct node))={-4:0}, n={-1:0}, p={-3:0}, pred={0:0}, root={0:0}, t={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 198 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 34.5s, OverallIterations: 19, TraceHistogramMax: 3, AutomataDifference: 26.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3252 SDtfs, 7263 SDslu, 26850 SDs, 0 SdLazy, 11991 SolverSat, 815 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 564 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=372occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 876 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 1380 NumberOfCodeBlocks, 1380 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1274 ConstructedInterpolants, 0 QuantifiedInterpolants, 671397 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 36/119 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...