/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/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 01:08:46,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 01:08:46,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 01:08:46,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 01:08:46,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 01:08:46,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 01:08:46,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 01:08:46,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 01:08:46,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 01:08:46,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 01:08:46,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 01:08:46,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 01:08:46,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 01:08:46,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 01:08:46,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 01:08:46,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 01:08:46,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 01:08:46,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 01:08:46,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 01:08:46,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 01:08:46,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 01:08:46,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 01:08:46,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 01:08:46,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 01:08:46,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 01:08:46,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 01:08:46,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 01:08:46,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 01:08:46,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 01:08:46,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 01:08:46,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 01:08:46,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 01:08:46,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 01:08:46,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 01:08:46,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 01:08:46,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 01:08:46,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 01:08:46,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 01:08:46,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 01:08:46,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 01:08:46,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 01:08:46,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 01:08:46,817 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 01:08:46,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 01:08:46,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 01:08:46,822 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 01:08:46,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 01:08:46,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 01:08:46,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 01:08:46,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 01:08:46,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 01:08:46,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 01:08:46,824 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 01:08:46,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 01:08:46,825 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 01:08:46,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 01:08:46,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 01:08:46,826 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 01:08:46,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 01:08:46,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 01:08:46,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:08:46,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 01:08:46,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 01:08:46,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 01:08:46,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 01:08:47,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 01:08:47,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 01:08:47,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 01:08:47,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 01:08:47,251 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 01:08:47,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-24 01:08:47,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32589c30b/592125fd39314650a5c4ad431f633e14/FLAG1ea254a38 [2020-10-24 01:08:48,107 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 01:08:48,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-10-24 01:08:48,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32589c30b/592125fd39314650a5c4ad431f633e14/FLAG1ea254a38 [2020-10-24 01:08:48,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32589c30b/592125fd39314650a5c4ad431f633e14 [2020-10-24 01:08:48,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 01:08:48,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 01:08:48,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 01:08:48,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 01:08:48,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 01:08:48,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:08:48" (1/1) ... [2020-10-24 01:08:48,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4d6f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:48, skipping insertion in model container [2020-10-24 01:08:48,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:08:48" (1/1) ... [2020-10-24 01:08:48,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 01:08:48,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 01:08:48,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:08:48,857 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 01:08:48,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:08:49,029 INFO L208 MainTranslator]: Completed translation [2020-10-24 01:08:49,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49 WrapperNode [2020-10-24 01:08:49,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 01:08:49,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 01:08:49,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 01:08:49,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 01:08:49,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (1/1) ... [2020-10-24 01:08:49,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (1/1) ... [2020-10-24 01:08:49,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (1/1) ... [2020-10-24 01:08:49,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (1/1) ... [2020-10-24 01:08:49,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (1/1) ... [2020-10-24 01:08:49,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (1/1) ... [2020-10-24 01:08:49,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (1/1) ... [2020-10-24 01:08:49,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 01:08:49,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 01:08:49,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 01:08:49,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 01:08:49,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (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 [2020-10-24 01:08:49,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 01:08:49,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 01:08:49,187 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 01:08:49,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 01:08:49,187 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-24 01:08:49,187 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-24 01:08:49,187 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-24 01:08:49,187 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-24 01:08:49,188 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-24 01:08:49,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-24 01:08:49,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-24 01:08:49,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-24 01:08:49,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-24 01:08:49,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-24 01:08:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-24 01:08:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-24 01:08:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-24 01:08:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-24 01:08:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-24 01:08:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-24 01:08:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-24 01:08:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-24 01:08:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-24 01:08:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-24 01:08:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-24 01:08:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-24 01:08:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-24 01:08:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-24 01:08:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-24 01:08:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-24 01:08:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-24 01:08:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-24 01:08:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-24 01:08:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-24 01:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-24 01:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-24 01:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-24 01:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-24 01:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-24 01:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-24 01:08:49,192 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-24 01:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-24 01:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-24 01:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-24 01:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-24 01:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-24 01:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-24 01:08:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 01:08:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-24 01:08:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-24 01:08:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-24 01:08:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-24 01:08:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-24 01:08:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-24 01:08:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-24 01:08:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-24 01:08:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 01:08:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-24 01:08:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-24 01:08:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-24 01:08:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-24 01:08:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-24 01:08:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-24 01:08:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-24 01:08:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-24 01:08:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-24 01:08:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-24 01:08:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-24 01:08:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-24 01:08:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-24 01:08:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-24 01:08:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-24 01:08:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-24 01:08:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-24 01:08:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-24 01:08:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-24 01:08:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-24 01:08:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-24 01:08:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-24 01:08:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-24 01:08:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-24 01:08:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-24 01:08:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-24 01:08:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-24 01:08:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-24 01:08:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-24 01:08:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-24 01:08:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-24 01:08:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-24 01:08:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-24 01:08:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-24 01:08:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-24 01:08:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-24 01:08:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-24 01:08:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-24 01:08:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-24 01:08:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-24 01:08:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-24 01:08:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-24 01:08:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-24 01:08:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 01:08:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 01:08:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 01:08:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 01:08:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 01:08:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 01:08:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 01:08:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 01:08:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 01:08:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 01:08:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 01:08:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 01:08:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 01:08:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 01:08:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 01:08:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 01:08:50,073 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 01:08:50,073 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-24 01:08:50,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:08:50 BoogieIcfgContainer [2020-10-24 01:08:50,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 01:08:50,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 01:08:50,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 01:08:50,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 01:08:50,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:08:48" (1/3) ... [2020-10-24 01:08:50,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca04df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:08:50, skipping insertion in model container [2020-10-24 01:08:50,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:49" (2/3) ... [2020-10-24 01:08:50,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca04df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:08:50, skipping insertion in model container [2020-10-24 01:08:50,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:08:50" (3/3) ... [2020-10-24 01:08:50,088 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-10-24 01:08:50,101 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 01:08:50,108 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 01:08:50,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 01:08:50,161 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 01:08:50,161 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 01:08:50,161 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 01:08:50,162 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 01:08:50,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 01:08:50,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 01:08:50,166 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 01:08:50,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 01:08:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-10-24 01:08:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 01:08:50,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:50,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:50,216 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1609758844, now seen corresponding path program 1 times [2020-10-24 01:08:50,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:50,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522921650] [2020-10-24 01:08:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:50,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:50,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522921650] [2020-10-24 01:08:50,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:50,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 01:08:50,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980835217] [2020-10-24 01:08:50,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 01:08:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 01:08:50,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 01:08:50,569 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2020-10-24 01:08:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:51,083 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-10-24 01:08:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 01:08:51,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-24 01:08:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:51,098 INFO L225 Difference]: With dead ends: 358 [2020-10-24 01:08:51,098 INFO L226 Difference]: Without dead ends: 186 [2020-10-24 01:08:51,107 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 [2020-10-24 01:08:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-24 01:08:51,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-24 01:08:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-24 01:08:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2020-10-24 01:08:51,222 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 18 [2020-10-24 01:08:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:51,223 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2020-10-24 01:08:51,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 01:08:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2020-10-24 01:08:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-24 01:08:51,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:51,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:51,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 01:08:51,227 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1384880224, now seen corresponding path program 1 times [2020-10-24 01:08:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555524371] [2020-10-24 01:08:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:51,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:51,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555524371] [2020-10-24 01:08:51,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:51,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:08:51,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323074046] [2020-10-24 01:08:51,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:51,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:51,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:51,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:51,366 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand 4 states. [2020-10-24 01:08:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:51,657 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2020-10-24 01:08:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:51,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-24 01:08:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:51,660 INFO L225 Difference]: With dead ends: 167 [2020-10-24 01:08:51,660 INFO L226 Difference]: Without dead ends: 160 [2020-10-24 01:08:51,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-24 01:08:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-24 01:08:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-24 01:08:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 181 transitions. [2020-10-24 01:08:51,683 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 181 transitions. Word has length 30 [2020-10-24 01:08:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:51,683 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 181 transitions. [2020-10-24 01:08:51,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 181 transitions. [2020-10-24 01:08:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 01:08:51,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:51,685 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] [2020-10-24 01:08:51,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 01:08:51,686 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:51,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1492035453, now seen corresponding path program 1 times [2020-10-24 01:08:51,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:51,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66045565] [2020-10-24 01:08:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:51,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:51,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66045565] [2020-10-24 01:08:51,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:51,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:08:51,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228190943] [2020-10-24 01:08:51,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:08:51,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:08:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:51,824 INFO L87 Difference]: Start difference. First operand 160 states and 181 transitions. Second operand 8 states. [2020-10-24 01:08:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:52,468 INFO L93 Difference]: Finished difference Result 249 states and 284 transitions. [2020-10-24 01:08:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 01:08:52,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-24 01:08:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:52,471 INFO L225 Difference]: With dead ends: 249 [2020-10-24 01:08:52,471 INFO L226 Difference]: Without dead ends: 242 [2020-10-24 01:08:52,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:08:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-24 01:08:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 155. [2020-10-24 01:08:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-24 01:08:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-10-24 01:08:52,496 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 32 [2020-10-24 01:08:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:52,497 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-10-24 01:08:52,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:08:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-10-24 01:08:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-24 01:08:52,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:52,499 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] [2020-10-24 01:08:52,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 01:08:52,499 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash -66764841, now seen corresponding path program 1 times [2020-10-24 01:08:52,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:52,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970474710] [2020-10-24 01:08:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:52,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:52,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970474710] [2020-10-24 01:08:52,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:52,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 01:08:52,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391741039] [2020-10-24 01:08:52,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 01:08:52,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 01:08:52,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:08:52,606 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 6 states. [2020-10-24 01:08:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:53,120 INFO L93 Difference]: Finished difference Result 362 states and 415 transitions. [2020-10-24 01:08:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 01:08:53,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-24 01:08:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:53,122 INFO L225 Difference]: With dead ends: 362 [2020-10-24 01:08:53,123 INFO L226 Difference]: Without dead ends: 241 [2020-10-24 01:08:53,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-24 01:08:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 158. [2020-10-24 01:08:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 01:08:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2020-10-24 01:08:53,175 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 38 [2020-10-24 01:08:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:53,176 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2020-10-24 01:08:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 01:08:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2020-10-24 01:08:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-24 01:08:53,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:53,179 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] [2020-10-24 01:08:53,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 01:08:53,179 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1112940044, now seen corresponding path program 1 times [2020-10-24 01:08:53,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:53,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965352546] [2020-10-24 01:08:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:53,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:53,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965352546] [2020-10-24 01:08:53,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:53,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 01:08:53,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263148218] [2020-10-24 01:08:53,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 01:08:53,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:53,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 01:08:53,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:08:53,301 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand 6 states. [2020-10-24 01:08:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:53,836 INFO L93 Difference]: Finished difference Result 260 states and 296 transitions. [2020-10-24 01:08:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 01:08:53,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-24 01:08:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:53,839 INFO L225 Difference]: With dead ends: 260 [2020-10-24 01:08:53,839 INFO L226 Difference]: Without dead ends: 229 [2020-10-24 01:08:53,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-24 01:08:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 158. [2020-10-24 01:08:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 01:08:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-10-24 01:08:53,879 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 40 [2020-10-24 01:08:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:53,882 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-10-24 01:08:53,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 01:08:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-10-24 01:08:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-24 01:08:53,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:53,894 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] [2020-10-24 01:08:53,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 01:08:53,895 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash 232926315, now seen corresponding path program 1 times [2020-10-24 01:08:53,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:53,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449782823] [2020-10-24 01:08:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:54,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:54,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449782823] [2020-10-24 01:08:54,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:54,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 01:08:54,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114150855] [2020-10-24 01:08:54,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 01:08:54,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:54,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 01:08:54,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 01:08:54,057 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 7 states. [2020-10-24 01:08:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:54,662 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2020-10-24 01:08:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 01:08:54,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-24 01:08:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:54,664 INFO L225 Difference]: With dead ends: 238 [2020-10-24 01:08:54,664 INFO L226 Difference]: Without dead ends: 233 [2020-10-24 01:08:54,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-24 01:08:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-24 01:08:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 156. [2020-10-24 01:08:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-24 01:08:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2020-10-24 01:08:54,702 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 44 [2020-10-24 01:08:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:54,702 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2020-10-24 01:08:54,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 01:08:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2020-10-24 01:08:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 01:08:54,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:54,703 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] [2020-10-24 01:08:54,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 01:08:54,704 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:54,704 INFO L82 PathProgramCache]: Analyzing trace with hash 439633619, now seen corresponding path program 1 times [2020-10-24 01:08:54,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:54,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36724408] [2020-10-24 01:08:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:54,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:54,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36724408] [2020-10-24 01:08:54,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:54,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:08:54,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064632395] [2020-10-24 01:08:54,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:54,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:54,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:54,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:54,787 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand 4 states. [2020-10-24 01:08:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:55,080 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2020-10-24 01:08:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:55,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-24 01:08:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:55,083 INFO L225 Difference]: With dead ends: 259 [2020-10-24 01:08:55,083 INFO L226 Difference]: Without dead ends: 192 [2020-10-24 01:08:55,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-24 01:08:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2020-10-24 01:08:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-24 01:08:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2020-10-24 01:08:55,109 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 48 [2020-10-24 01:08:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:55,110 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2020-10-24 01:08:55,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2020-10-24 01:08:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 01:08:55,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:55,112 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] [2020-10-24 01:08:55,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 01:08:55,113 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash 824217848, now seen corresponding path program 1 times [2020-10-24 01:08:55,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:55,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190358331] [2020-10-24 01:08:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:55,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:55,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190358331] [2020-10-24 01:08:55,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:55,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:08:55,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566833203] [2020-10-24 01:08:55,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:55,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:55,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:55,214 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand 4 states. [2020-10-24 01:08:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:55,505 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2020-10-24 01:08:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:55,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-24 01:08:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:55,508 INFO L225 Difference]: With dead ends: 162 [2020-10-24 01:08:55,508 INFO L226 Difference]: Without dead ends: 158 [2020-10-24 01:08:55,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-24 01:08:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-24 01:08:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 01:08:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2020-10-24 01:08:55,533 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 50 [2020-10-24 01:08:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:55,533 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2020-10-24 01:08:55,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2020-10-24 01:08:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-24 01:08:55,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:55,535 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] [2020-10-24 01:08:55,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 01:08:55,536 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash -817730258, now seen corresponding path program 1 times [2020-10-24 01:08:55,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:55,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055618072] [2020-10-24 01:08:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:55,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:55,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055618072] [2020-10-24 01:08:55,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:55,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 01:08:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503777678] [2020-10-24 01:08:55,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 01:08:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 01:08:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:08:55,766 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand 9 states. [2020-10-24 01:08:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:56,533 INFO L93 Difference]: Finished difference Result 345 states and 390 transitions. [2020-10-24 01:08:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 01:08:56,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-24 01:08:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:56,536 INFO L225 Difference]: With dead ends: 345 [2020-10-24 01:08:56,536 INFO L226 Difference]: Without dead ends: 276 [2020-10-24 01:08:56,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:08:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-24 01:08:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-10-24 01:08:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-24 01:08:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2020-10-24 01:08:56,566 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 54 [2020-10-24 01:08:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:56,567 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2020-10-24 01:08:56,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 01:08:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2020-10-24 01:08:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-24 01:08:56,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:56,569 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] [2020-10-24 01:08:56,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 01:08:56,569 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash -419961564, now seen corresponding path program 1 times [2020-10-24 01:08:56,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:56,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457418140] [2020-10-24 01:08:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:56,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:56,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457418140] [2020-10-24 01:08:56,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:56,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:08:56,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499117426] [2020-10-24 01:08:56,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:56,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:56,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:56,645 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand 4 states. [2020-10-24 01:08:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:56,929 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2020-10-24 01:08:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:56,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-24 01:08:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:56,931 INFO L225 Difference]: With dead ends: 185 [2020-10-24 01:08:56,931 INFO L226 Difference]: Without dead ends: 178 [2020-10-24 01:08:56,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-24 01:08:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-24 01:08:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-24 01:08:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2020-10-24 01:08:56,968 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 58 [2020-10-24 01:08:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:56,969 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2020-10-24 01:08:56,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2020-10-24 01:08:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 01:08:56,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:56,970 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] [2020-10-24 01:08:56,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 01:08:56,970 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1529988056, now seen corresponding path program 1 times [2020-10-24 01:08:56,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:56,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144053091] [2020-10-24 01:08:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:57,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 01:08:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144053091] [2020-10-24 01:08:57,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:57,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:08:57,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817590378] [2020-10-24 01:08:57,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:08:57,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:57,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:08:57,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:57,125 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand 8 states. [2020-10-24 01:08:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:57,706 INFO L93 Difference]: Finished difference Result 263 states and 293 transitions. [2020-10-24 01:08:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 01:08:57,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-24 01:08:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:57,709 INFO L225 Difference]: With dead ends: 263 [2020-10-24 01:08:57,709 INFO L226 Difference]: Without dead ends: 233 [2020-10-24 01:08:57,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-24 01:08:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-24 01:08:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2020-10-24 01:08:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-24 01:08:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2020-10-24 01:08:57,740 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 59 [2020-10-24 01:08:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:57,741 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2020-10-24 01:08:57,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:08:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2020-10-24 01:08:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 01:08:57,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:57,742 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] [2020-10-24 01:08:57,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 01:08:57,742 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash 184861191, now seen corresponding path program 1 times [2020-10-24 01:08:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:57,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713381232] [2020-10-24 01:08:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:58,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:58,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713381232] [2020-10-24 01:08:58,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:58,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-24 01:08:58,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80778648] [2020-10-24 01:08:58,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 01:08:58,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 01:08:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-24 01:08:58,205 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand 14 states. [2020-10-24 01:09:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:00,591 INFO L93 Difference]: Finished difference Result 637 states and 723 transitions. [2020-10-24 01:09:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 01:09:00,594 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-24 01:09:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:00,598 INFO L225 Difference]: With dead ends: 637 [2020-10-24 01:09:00,598 INFO L226 Difference]: Without dead ends: 632 [2020-10-24 01:09:00,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 01:09:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-10-24 01:09:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 236. [2020-10-24 01:09:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-24 01:09:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 264 transitions. [2020-10-24 01:09:00,652 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 264 transitions. Word has length 59 [2020-10-24 01:09:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:00,653 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 264 transitions. [2020-10-24 01:09:00,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 01:09:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 264 transitions. [2020-10-24 01:09:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 01:09:00,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:00,654 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] [2020-10-24 01:09:00,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 01:09:00,654 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:00,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:00,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1994540127, now seen corresponding path program 1 times [2020-10-24 01:09:00,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:00,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181642720] [2020-10-24 01:09:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:00,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181642720] [2020-10-24 01:09:00,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:00,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:09:00,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122830022] [2020-10-24 01:09:00,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:09:00,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:00,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:09:00,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:09:00,779 INFO L87 Difference]: Start difference. First operand 236 states and 264 transitions. Second operand 8 states. [2020-10-24 01:09:01,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:01,325 INFO L93 Difference]: Finished difference Result 257 states and 286 transitions. [2020-10-24 01:09:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 01:09:01,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-24 01:09:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:01,327 INFO L225 Difference]: With dead ends: 257 [2020-10-24 01:09:01,327 INFO L226 Difference]: Without dead ends: 250 [2020-10-24 01:09:01,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-24 01:09:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-24 01:09:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 231. [2020-10-24 01:09:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-24 01:09:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2020-10-24 01:09:01,372 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 60 [2020-10-24 01:09:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:01,373 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2020-10-24 01:09:01,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:09:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2020-10-24 01:09:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-24 01:09:01,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:01,374 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, 1, 1, 1] [2020-10-24 01:09:01,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 01:09:01,374 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:01,375 INFO L82 PathProgramCache]: Analyzing trace with hash -215686495, now seen corresponding path program 1 times [2020-10-24 01:09:01,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:01,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263618341] [2020-10-24 01:09:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:01,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:01,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263618341] [2020-10-24 01:09:01,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:01,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-24 01:09:01,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202525380] [2020-10-24 01:09:01,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 01:09:01,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:01,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 01:09:01,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-24 01:09:01,866 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand 15 states. [2020-10-24 01:09:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:04,260 INFO L93 Difference]: Finished difference Result 625 states and 708 transitions. [2020-10-24 01:09:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 01:09:04,261 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-24 01:09:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:04,265 INFO L225 Difference]: With dead ends: 625 [2020-10-24 01:09:04,265 INFO L226 Difference]: Without dead ends: 620 [2020-10-24 01:09:04,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 01:09:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-24 01:09:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 235. [2020-10-24 01:09:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-24 01:09:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 262 transitions. [2020-10-24 01:09:04,329 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 262 transitions. Word has length 63 [2020-10-24 01:09:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:04,330 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 262 transitions. [2020-10-24 01:09:04,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 01:09:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 262 transitions. [2020-10-24 01:09:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 01:09:04,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:04,331 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, 1, 1, 1, 1] [2020-10-24 01:09:04,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 01:09:04,331 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash -233861473, now seen corresponding path program 1 times [2020-10-24 01:09:04,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:04,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913323012] [2020-10-24 01:09:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:04,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 01:09:04,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913323012] [2020-10-24 01:09:04,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:04,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:09:04,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568972367] [2020-10-24 01:09:04,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:09:04,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:09:04,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:09:04,396 INFO L87 Difference]: Start difference. First operand 235 states and 262 transitions. Second operand 4 states. [2020-10-24 01:09:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:04,743 INFO L93 Difference]: Finished difference Result 243 states and 269 transitions. [2020-10-24 01:09:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:09:04,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-24 01:09:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:04,745 INFO L225 Difference]: With dead ends: 243 [2020-10-24 01:09:04,745 INFO L226 Difference]: Without dead ends: 239 [2020-10-24 01:09:04,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:09:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-24 01:09:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 234. [2020-10-24 01:09:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-24 01:09:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 260 transitions. [2020-10-24 01:09:04,802 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 260 transitions. Word has length 64 [2020-10-24 01:09:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:04,802 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 260 transitions. [2020-10-24 01:09:04,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:09:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 260 transitions. [2020-10-24 01:09:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-24 01:09:04,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:04,804 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:09:04,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 01:09:04,804 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash 906480798, now seen corresponding path program 1 times [2020-10-24 01:09:04,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:04,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653666656] [2020-10-24 01:09:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:04,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:04,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653666656] [2020-10-24 01:09:04,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:04,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 01:09:04,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541020526] [2020-10-24 01:09:04,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 01:09:04,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 01:09:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 01:09:04,919 INFO L87 Difference]: Start difference. First operand 234 states and 260 transitions. Second operand 7 states. [2020-10-24 01:09:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:05,535 INFO L93 Difference]: Finished difference Result 378 states and 425 transitions. [2020-10-24 01:09:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 01:09:05,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-24 01:09:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:05,538 INFO L225 Difference]: With dead ends: 378 [2020-10-24 01:09:05,538 INFO L226 Difference]: Without dead ends: 271 [2020-10-24 01:09:05,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-24 01:09:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-24 01:09:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2020-10-24 01:09:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-24 01:09:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 258 transitions. [2020-10-24 01:09:05,603 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 258 transitions. Word has length 65 [2020-10-24 01:09:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:05,603 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 258 transitions. [2020-10-24 01:09:05,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 01:09:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 258 transitions. [2020-10-24 01:09:05,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-24 01:09:05,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:05,605 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:05,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 01:09:05,605 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:05,606 INFO L82 PathProgramCache]: Analyzing trace with hash 894248917, now seen corresponding path program 1 times [2020-10-24 01:09:05,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:05,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459164642] [2020-10-24 01:09:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:05,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:05,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459164642] [2020-10-24 01:09:05,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:05,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 01:09:05,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727664343] [2020-10-24 01:09:05,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 01:09:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:05,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 01:09:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:09:05,741 INFO L87 Difference]: Start difference. First operand 234 states and 258 transitions. Second operand 9 states. [2020-10-24 01:09:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:06,813 INFO L93 Difference]: Finished difference Result 490 states and 547 transitions. [2020-10-24 01:09:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 01:09:06,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-10-24 01:09:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:06,816 INFO L225 Difference]: With dead ends: 490 [2020-10-24 01:09:06,817 INFO L226 Difference]: Without dead ends: 422 [2020-10-24 01:09:06,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-10-24 01:09:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-24 01:09:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 320. [2020-10-24 01:09:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-24 01:09:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 357 transitions. [2020-10-24 01:09:06,922 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 357 transitions. Word has length 68 [2020-10-24 01:09:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:06,923 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 357 transitions. [2020-10-24 01:09:06,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 01:09:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 357 transitions. [2020-10-24 01:09:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-24 01:09:06,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:06,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:06,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 01:09:06,924 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash -680181352, now seen corresponding path program 1 times [2020-10-24 01:09:06,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:06,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918185917] [2020-10-24 01:09:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:06,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:06,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918185917] [2020-10-24 01:09:06,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:06,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:09:06,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033561266] [2020-10-24 01:09:06,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:09:06,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:09:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:09:07,000 INFO L87 Difference]: Start difference. First operand 320 states and 357 transitions. Second operand 4 states. [2020-10-24 01:09:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:07,566 INFO L93 Difference]: Finished difference Result 560 states and 644 transitions. [2020-10-24 01:09:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:09:07,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-24 01:09:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:07,571 INFO L225 Difference]: With dead ends: 560 [2020-10-24 01:09:07,571 INFO L226 Difference]: Without dead ends: 426 [2020-10-24 01:09:07,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:09:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-24 01:09:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 369. [2020-10-24 01:09:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-24 01:09:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 415 transitions. [2020-10-24 01:09:07,725 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 415 transitions. Word has length 70 [2020-10-24 01:09:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:07,726 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 415 transitions. [2020-10-24 01:09:07,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:09:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 415 transitions. [2020-10-24 01:09:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-24 01:09:07,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:07,728 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 01:09:07,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 01:09:07,728 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash -266651992, now seen corresponding path program 1 times [2020-10-24 01:09:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:07,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573936396] [2020-10-24 01:09:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:07,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573936396] [2020-10-24 01:09:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 01:09:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957049571] [2020-10-24 01:09:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 01:09:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 01:09:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-24 01:09:07,881 INFO L87 Difference]: Start difference. First operand 369 states and 415 transitions. Second operand 10 states. [2020-10-24 01:09:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:08,956 INFO L93 Difference]: Finished difference Result 600 states and 682 transitions. [2020-10-24 01:09:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 01:09:08,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-24 01:09:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:08,959 INFO L225 Difference]: With dead ends: 600 [2020-10-24 01:09:08,959 INFO L226 Difference]: Without dead ends: 539 [2020-10-24 01:09:08,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-24 01:09:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-24 01:09:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 416. [2020-10-24 01:09:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-24 01:09:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 470 transitions. [2020-10-24 01:09:09,093 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 470 transitions. Word has length 73 [2020-10-24 01:09:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:09,094 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 470 transitions. [2020-10-24 01:09:09,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 01:09:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 470 transitions. [2020-10-24 01:09:09,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-24 01:09:09,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:09,095 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-10-24 01:09:09,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 01:09:09,096 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:09,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2064139585, now seen corresponding path program 1 times [2020-10-24 01:09:09,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:09,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933116482] [2020-10-24 01:09:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:09:09,124 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:09:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:09:09,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:09:09,189 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 01:09:09,189 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 01:09:09,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 01:09:09,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 01:09:09 BoogieIcfgContainer [2020-10-24 01:09:09,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 01:09:09,299 INFO L168 Benchmark]: Toolchain (without parser) took 20891.58 ms. Allocated memory was 158.3 MB in the beginning and 298.8 MB in the end (delta: 140.5 MB). Free memory was 133.3 MB in the beginning and 264.0 MB in the end (delta: -130.7 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:09,299 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 132.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:09:09,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.72 ms. Allocated memory is still 158.3 MB. Free memory was 132.7 MB in the beginning and 110.1 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:09,300 INFO L168 Benchmark]: Boogie Preprocessor took 84.05 ms. Allocated memory is still 158.3 MB. Free memory was 110.1 MB in the beginning and 107.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:09,300 INFO L168 Benchmark]: RCFGBuilder took 961.98 ms. Allocated memory is still 158.3 MB. Free memory was 107.0 MB in the beginning and 119.5 MB in the end (delta: -12.6 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:09,301 INFO L168 Benchmark]: TraceAbstraction took 19217.46 ms. Allocated memory was 158.3 MB in the beginning and 298.8 MB in the end (delta: 140.5 MB). Free memory was 119.0 MB in the beginning and 264.0 MB in the end (delta: -145.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:09:09,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 132.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 607.72 ms. Allocated memory is still 158.3 MB. Free memory was 132.7 MB in the beginning and 110.1 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.05 ms. Allocated memory is still 158.3 MB. Free memory was 110.1 MB in the beginning and 107.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 961.98 ms. Allocated memory is still 158.3 MB. Free memory was 107.0 MB in the beginning and 119.5 MB in the end (delta: -12.6 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19217.46 ms. Allocated memory was 158.3 MB in the beginning and 298.8 MB in the end (delta: 140.5 MB). Free memory was 119.0 MB in the beginning and 264.0 MB in the end (delta: -145.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1002] SLL* list = malloc(sizeof(SLL)); VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1003] list->next = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] COND FALSE !(!(list != ((void*)0))) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] list->inner = malloc(sizeof(SLL)) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1004] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1004] list->inner->next = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1004] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1004] list->inner->inner = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1004] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1004] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1004] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1006] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1009] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1019] end = ((void*)0) VAL [end={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1020] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1023] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1025] COND TRUE ((void*)0) != end VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1027] int len = 0; VAL [end={-1:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1028] EXPR end->inner VAL [end={-1:0}, end->inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1028] SLL* inner = end->inner; VAL [end={-1:0}, end->inner={-2:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1029] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1031] COND TRUE len == 0 VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1032] len = 1 VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1035] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1036] EXPR inner->inner VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1036] COND FALSE !(!(((void*)0) == inner->inner)) VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1037] EXPR inner->next VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1037] COND FALSE !(!(((void*)0) == inner->next)) VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1038] EXPR inner->inner VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1038] inner = inner->inner VAL [end={-1:0}, inner={0:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1039] COND TRUE len == 1 VAL [end={-1:0}, inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1040] EXPR inner->inner VAL [end={-1:0}, inner={0:0}, inner->inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1040] inner = inner->inner VAL [end={-1:0}, inner={54:-7}, inner->inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1029] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1031] COND FALSE !(len == 0) VAL [end={-1:0}, inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1034] len = 2 VAL [end={-1:0}, inner={54:-7}, len=2, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1035] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={54:-7}, len=2, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1036] EXPR inner->inner VAL [end={-1:0}, inner={54:-7}, inner->inner={58:50}, len=2, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1036] COND TRUE !(((void*)0) == inner->inner) VAL [end={-1:0}, inner={54:-7}, inner->inner={58:50}, len=2, list={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}] [L1036] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "sll-01-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 181 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.0s, OverallIterations: 20, TraceHistogramMax: 2, AutomataDifference: 14.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3285 SDtfs, 4761 SDslu, 9884 SDs, 0 SdLazy, 6962 SolverSat, 430 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=416occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 1617 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 1072 NumberOfCodeBlocks, 1072 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 974 ConstructedInterpolants, 0 QuantifiedInterpolants, 366599 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 16 PerfectInterpolantSequences, 12/16 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...